INSTRUCTION MANUA L
FOR
BE1-11g
Generator Protection System
Publication: 9424200994
Revision: N Sep-14
9424200994 Rev N i
Caution
Note
Preface
This instruction manual provides information about the installation and operation of the BE1-11g
Generator Protection System. To accomplish this, the following information is provided:
• General information and a quick start guide
• Controls and indicators
• Inputs and outputs
• Protection and control functions
• Reporting and alarms information
• Mounting and connection diagrams
• BESTCOMSPlus® software
• Communication and security
• Testing and troubleshooting procedures
• Specifications
• Time curve characteristics
• RTD module (optional)
Optional instruction manuals for the BE1-11g include:
• Modbus™ communication protocol (Basler Electric part number 9424200774)
• Distributed Network Protocol (DNP) (Basler Electric part number 9424200773)
• IEC 61850 communicat ion pr otoc ol (Basler Electric part number 9424200892)
Conventions Used in this Ma nua l
Important safety and procedural information is emphasized and presented in this manual through
warning, caution, and note boxes. Each type is illustrated and defined as follows.
Warning!
Warning boxes call attention to conditions or actions that may cause
personal injury or death.
Caution boxes call attention to operating conditions that may lead to
equipment or property damage.
Note boxes emphasize important information pertaining to installation
or operation.
BE1-11g Preface
ii 9424200994 Rev N
Basler Electric does not assume any responsibility to compliance or noncompliance with national code, local code,
For terms of service relating to this product and software, see the Commercial Terms of Products and Services
document available at www.basler.com/terms.
This publication contains confidential information of Basler Electric Company, an Illinois corporation. It is loaned for
and options are subject to modification without notice. Over time, improvements and revisions may be made to this
manual.
The English-language version of this manual serves as the only approved manual version.
12570 State Route 143
Highland IL 62249-1074 USA
www.basler.com
info@basler.com
Tel: +1 618.654.2341
Fax: +1 618.654.2351
© 2014 by Basler Electric
All rights reserved
First printing: June 2009
Warning!
READ THIS MANUAL. Read this manual before installing, operating, or maintaining the BE1-11g. Note
all warnings, cautions, and notes in this manual as well as on the product. Keep this manual with the
product for reference. Only qualified personnel should install, operate, or service this system. Failure to
follow warning and cautionary labels may result in personal injury or property damage. Exercise
caution at all times.
or any other applicable code. This manual serves as reference material that must be well understood prior to
installation, operation, or maintenance.
confidential use, subject to return on request, and with the mutual und er st and ing that it will not be used in any
manner detrimental to the interests of Basler Electric Company and used strictly for the purpose intended.
It is not the intention of this manual to cover all details and variations in equipment, nor does this manual provide
data for every possible contingency regarding installation or operation. The availability and design of all features
publication. Before performing any of the following procedures, contact Basler Electric for the latest revision of this
Preface BE1-11g
9424200994 Rev N iii
Contents
Introduction ................................................................................................................................................. 1
Applications ............................................................................................................................................... 1
Features .................................................................................................................................................... 2
Model and Style Number Description ........................................................................................................ 8
Quick Start ................................................................................................................................................. 11
Maintenance ............................................................................................................................................ 11
Storage .................................................................................................................................................... 11
Install BESTCOMSPlus® Software .......................................................................................................... 11
Power Up and Activate the BE1-11 Plug-In ............................................................................................ 12
Programming the BE1-11g ...................................................................................................................... 16
Controls and Indicators ............................................................................................................................ 25
Illustrations and Descriptions .................................................................................................................. 25
Menu Navigation ...................................................................................................................................... 28
Front Panel Operations ........................................................................................................................... 28
Display Setup .......................................................................................................................................... 30
Contact Inputs and Outputs ..................................................................................................................... 33
Contact-Sensing Inputs ........................................................................................................................... 33
Contact Outputs ....................................................................................................................................... 37
Overexcitation (24) Protection ................................................................................................................. 43
Element Operation ................................................................................................................................... 43
Logic Connections ................................................................................................................................... 45
Operational Settings ................................................................................................................................ 45
Settings Example ..................................................................................................................................... 46
Sync-Check (25) Protection ..................................................................................................................... 49
Element Operation ................................................................................................................................... 49
Logic Connections ................................................................................................................................... 52
Operational Settings ................................................................................................................................ 52
Phase Undervoltage (27P) Protection ..................................................................................................... 55
Element Operation ................................................................................................................................... 55
Logic Connections ................................................................................................................................... 56
Operational Settings ................................................................................................................................ 57
Auxiliary Undervoltage (27X) Protection ................................................................................................ 59
Element Operation ................................................................................................................................... 59
Logic Connections ................................................................................................................................... 61
Operational Settings ................................................................................................................................ 61
Negative-Sequence Voltage (47) Protection........................................................................................... 63
Phase Overvoltage (59P) Protec tion ....................................................................................................... 65
Element Operation ................................................................................................................................... 65
Logic Connections ................................................................................................................................... 66
Operational Settings ................................................................................................................................ 66
Auxiliary Overvoltage (59X) Protection .................................................................................................. 69
Element Operation ................................................................................................................................... 69
Logic Connections ................................................................................................................................... 71
Operational Settings ................................................................................................................................ 71
Stator Ground (64G) Protection ............................................................................................................... 73
Vector Jump (78V) Protection .................................................................................................................. 75
Element Operation ................................................................................................................................... 75
Logic Connections ................................................................................................................................... 76
Operational Settings ................................................................................................................................ 76
BE1-11g Contents
iv 9424200994 Rev N
Frequency (81) Protection ........................................................................................................................ 79
Frequency Measurement......................................................................................................................... 79
Underfrequency and Overfrequency Protection ...................................................................................... 79
Frequency Rate-of-Change Protection .................................................................................................... 80
Logic Connections ................................................................................................................................... 82
Operational Settings ................................................................................................................................ 82
Negative-Sequence Overcurrent (46) Protection ................................................................................... 85
Pickup Settings ........................................................................................................................................ 85
Coordination Settings .............................................................................................................................. 86
Instantaneous Overcurrent (50) Protection ............................................................................................ 87
Element Operation ................................................................................................................................... 87
Logic Connections ................................................................................................................................... 88
Operational Settings ................................................................................................................................ 89
Breaker Failure (50BF) Protection ........................................................................................................... 91
Element Operation ................................................................................................................................... 91
Logic Connections ................................................................................................................................... 92
Operational Settings ................................................................................................................................ 93
Inverse Overcurrent (51) Protection ........................................................................................................ 95
Element Operation ................................................................................................................................... 95
Logic Connections ................................................................................................................................. 100
Operational Settings .............................................................................................................................. 100
Directional Overcurrent (67) Protection ................................................................................................ 103
Polarization Methods ............................................................................................................................. 103
Maximum Torque Angle and Directional Tests ..................................................................................... 105
Theory of Using Sequence Impedances for Fault Direction .................................................................. 106
Phase Current Differential (87) Prote ction ........................................................................................... 109
Element Operation ................................................................................................................................. 109
Logic Connections ................................................................................................................................. 112
Settings .................................................................................................................................................. 113
Neutral Current Differential (87N) Protection ....................................................................................... 117
Element Operation ................................................................................................................................. 117
Logic Connections ................................................................................................................................. 119
Operational Settings .............................................................................................................................. 120
Phase Differential Protection: Self-Balancing and Split-Phase Configurations (50/51) .................. 121
Power (32) Protection ............................................................................................................................. 123
Element Operation ................................................................................................................................. 123
Logic Connections ................................................................................................................................. 126
Operational Settings .............................................................................................................................. 126
Loss of Excitation - Reverse Var Based (40Q) Protection .................................................................. 127
Element Operation ................................................................................................................................. 127
Logic Connections ................................................................................................................................. 128
Operational Settings .............................................................................................................................. 129
Distance (21) Protection ......................................................................................................................... 131
Element Operation ................................................................................................................................. 131
Logic Connections ................................................................................................................................. 132
Operational Settings .............................................................................................................................. 132
Loss of Excitation - Impedance Based (40Z) Protection ..................................................................... 135
Element Operation ................................................................................................................................. 135
Logic Connections ................................................................................................................................. 136
Operational Settings .............................................................................................................................. 137
Typical Applic a tion ................................................................................................................................. 138
Contents BE1-11g
9424200994 Rev N v
Out of Step (78OOS) Protection ............................................................................................................ 139
Element Operation ................................................................................................................................. 139
Logic Connections ................................................................................................................................. 140
Operational Settings .............................................................................................................................. 141
Resistance Temperature Detector (49RTD) Protection ....................................................................... 143
Element Operation ................................................................................................................................. 143
Logic Connections ................................................................................................................................. 144
Operational Settings .............................................................................................................................. 144
Remote RTD Metering........................................................................................................................... 145
Analog Input Protection ......................................................................................................................... 147
Element Operation ................................................................................................................................. 147
Logic Connections ................................................................................................................................. 148
Operational Settings .............................................................................................................................. 148
Remote Analog Input Metering .............................................................................................................. 149
Synchronizer (25A) ................................................................................................................................. 151
Element Operation ................................................................................................................................. 151
Logic Connections ................................................................................................................................. 155
Operational Settings .............................................................................................................................. 157
Virtual Control Switches (43) ................................................................................................................. 159
Element Operation ................................................................................................................................. 159
Logic Connections ................................................................................................................................. 161
Operational Settings .............................................................................................................................. 161
Logic Timers (62) .................................................................................................................................... 163
Element Operation ................................................................................................................................. 163
Logic Connections ................................................................................................................................. 166
Operational Settings .............................................................................................................................. 166
Lockout Functions (86) ........................................................................................................................... 169
Element Operation ................................................................................................................................. 169
Logic Connections ................................................................................................................................. 169
Operational Settings .............................................................................................................................. 169
Retrieving Lockout Status from the BE1-11g ........................................................................................ 170
Breaker Control Switch (101) ................................................................................................................. 171
Element Operation ................................................................................................................................. 171
Logic Connections ................................................................................................................................. 172
Operational Settings .............................................................................................................................. 173
Setting Groups ........................................................................................................................................ 175
Setting Group Functions ........................................................................................................................ 175
Logic Connections ................................................................................................................................. 178
Operational Settings .............................................................................................................................. 179
Logic Override of the Setting Group Selection Function ....................................................................... 181
Metering ................................................................................................................................................... 183
Metering Explorer .................................................................................................................................. 183
Analog Metering Functions .................................................................................................................... 184
Sequence of Events ................................................................................................................................ 191
Retrieving SER Information ................................................................................................................... 191
Fault Reporting ........................................................................................................................................ 193
Fault Reporting Trigger Logic ................................................................................................................ 193
Targets .................................................................................................................................................. 193
Fault Reports ......................................................................................................................................... 196
Oscillographic Records.......................................................................................................................... 199
Distance to Fault .................................................................................................................................... 200
Protective Fault Analysis ....................................................................................................................... 202
BE1-11g Contents
vi 9424200994 Rev N
Alarms ...................................................................................................................................................... 205
Alarm Settings ....................................................................................................................................... 207
User Programmable Alarms .................................................................................................................. 207
Retrieving Alarm Information ................................................................................................................. 208
Resetting Alarms ................................................................................................................................... 208
Differential Reporting ............................................................................................................................. 211
Breaker Monitoring ................................................................................................................................. 213
Breaker Status Reporting ...................................................................................................................... 213
Breaker Duty Monitoring ........................................................................................................................ 214
Breaker Alarms ...................................................................................................................................... 218
Demands .................................................................................................................................................. 219
Current ................................................................................................................................................... 219
Power..................................................................................................................................................... 220
Retrieving Demand Reporting Information ............................................................................................ 220
Load Profile ............................................................................................................................................. 223
Setting the Load Profile Recording Function ......................................................................................... 223
Retrieving Load Profile Recorded Data ................................................................................................. 223
Power Quality .......................................................................................................................................... 225
Power Quality Settings .......................................................................................................................... 225
Retrieving Power Quality Data .............................................................................................................. 225
Trip Circuit Monitor (52TCM).................................................................................................................. 229
Element Operation ................................................................................................................................. 229
Logic Connections ................................................................................................................................. 234
Operational Settings .............................................................................................................................. 235
Fuse Loss (60FL) ..................................................................................................................................... 237
Element Operation ................................................................................................................................. 237
Logic Connections ................................................................................................................................. 239
Operational Settings .............................................................................................................................. 239
BESTnet™Plus ......................................................................................................................................... 241
Status Page ........................................................................................................................................... 241
Real Time Data ...................................................................................................................................... 241
Demand Data ........................................................................................................................................ 242
Faults ..................................................................................................................................................... 243
Sequence of Events .............................................................................................................................. 245
Power Quality ........................................................................................................................................ 245
Mounting .................................................................................................................................................. 247
J Type Case Cutouts and Dimensions .................................................................................................. 247
H or P Type Case Cutouts and Dimensions.......................................................................................... 255
Dovetailing Procedure ........................................................................................................................... 262
Terminals and Connectors ..................................................................................................................... 265
J Type Case .......................................................................................................................................... 265
H or P Type Case .................................................................................................................................. 266
CT Polarity ............................................................................................................................................. 267
Typical Connections ............................................................................................................................... 271
Power System Applications ................................................................................................................... 277
BESTCOMSPlus® Software .................................................................................................................... 283
Installation ............................................................................................................................................. 284
Activate the BE1-11 Plugin for BESTCOMSPlus® ................................................................................ 284
Menu Bars ............................................................................................................................................. 289
Settings Explorer ................................................................................................................................... 291
Metering Explorer .................................................................................................................................. 292
Contents BE1-11g
9424200994 Rev N vii
Settings File Management ..................................................................................................................... 292
Auto Export Metering ............................................................................................................................. 294
BESTCOMSPlus® Updates ................................................................................................................... 295
Firmware Updates ................................................................................................................................. 295
BESTlogic™Plus ...................................................................................................................................... 297
Overview of BESTlogic™Plus ................................................................................................................ 297
Logic Schemes ...................................................................................................................................... 307
Programming BESTlogic ™Plus.............................................................................................................. 312
Offline Logic Simulator .......................................................................................................................... 313
BESTlogic™Plus File Management ....................................................................................................... 313
BESTlogic™Plus Ex amp les ................................................................................................................... 315
Communication ....................................................................................................................................... 317
Connections ........................................................................................................................................... 317
Ethernet Setup ....................................................................................................................................... 318
Email Setup ........................................................................................................................................... 320
RS-485 Setup ........................................................................................................................................ 321
DNP Setup ............................................................................................................................................. 321
Modbus™ Setup ..................................................................................................................................... 325
Security .................................................................................................................................................... 327
Access Levels ........................................................................................................................................ 327
Username Setup .................................................................................................................................... 327
Port Access Setup ................................................................................................................................. 328
Access Control ...................................................................................................................................... 329
Viewing the Security Log ....................................................................................................................... 330
Timekeeping ............................................................................................................................................ 331
Clock Setup ........................................................................................................................................... 331
Setting the Time and Date ..................................................................................................................... 332
IRIG Port ................................................................................................................................................ 333
Real-Time Clock Specificat ions ............................................................................................................. 333
Backup Battery for the Real-Time Clock ............................................................................................... 334
Device Information .................................................................................................................................. 339
Style Number ......................................................................................................................................... 339
Device Info ............................................................................................................................................. 340
Firmware Updates ................................................................................................................................. 340
Configuration ........................................................................................................................................... 343
Power System Measurements .............................................................................................................. 343
Power System Settings ......................................................................................................................... 346
Sensing Transformers Settings ............................................................................................................. 347
Transformer Setup ................................................................................................................................. 349
Display Units .......................................................................................................................................... 359
Introduction to Testing ........................................................................................................................... 361
Testing Philosophies ............................................................................................................................. 361
Testing and Troubleshooting Aids ......................................................................................................... 362
Acceptance Testing ................................................................................................................................ 365
Test Equipment ..................................................................................................................................... 365
Power Up ............................................................................................................................................... 365
Communications .................................................................................................................................... 365
Style Number and Serial Number Verificat io n ....................................................................................... 365
IRIG Verification (if used) ...................................................................................................................... 366
Contact Sensing Inputs ......................................................................................................................... 366
Control Outputs ..................................................................................................................................... 366
Current Circuit Verification..................................................................................................................... 367
Three-Phase Voltage Circuit Verification .............................................................................................. 368
Power Reading Verification ................................................................................................................... 369
BE1-11g Contents
viii 9424200994 Rev N
Auxiliary Voltage Input Verificati on - VX and VX 3
rd
(Fundamental and Third Harm onic ) ..................... 369
Frequency Verification ........................................................................................................................... 370
Commissioning Testing ......................................................................................................................... 371
Digital I/O Connection Verification ......................................................................................................... 371
Virtual Selector Switches ....................................................................................................................... 372
Virtual Contro l Sw i tc h ............................................................................................................................ 372
Protection and Control Function Verification ......................................................................................... 373
Verify Other Setpoints as Appropriate ................................................................................................... 373
Reporting and Alarm Functions ............................................................................................................. 373
Periodic Testing ...................................................................................................................................... 377
Settings Verification ............................................................................................................................... 377
Analog Circuit Verification ..................................................................................................................... 377
Overexcitation (24) Test ......................................................................................................................... 379
Functional Test Procedure .................................................................................................................... 379
Functional Test Report .......................................................................................................................... 383
Sync-Check (25) Test .............................................................................................................................. 385
Functional Test Procedure .................................................................................................................... 385
Functional Test Report .......................................................................................................................... 388
Phase Undervoltage (27P) Test ............................................................................................................. 391
Functional Test Procedure .................................................................................................................... 391
Functional Test Report .......................................................................................................................... 393
Auxiliary Undervoltage (27X) Test ......................................................................................................... 395
Functional Test Procedure .................................................................................................................... 395
Functional Test Report .......................................................................................................................... 404
Phase Overvoltage (59P) Test................................................................................................................ 407
Functional Test Procedure .................................................................................................................... 407
Functional Test Report .......................................................................................................................... 409
Auxiliary Overvoltage (59X) Test ........................................................................................................... 411
Functional Test Procedure .................................................................................................................... 411
Functional Test Report .......................................................................................................................... 419
Vector Jump (78V) Test .......................................................................................................................... 423
Functional Test Procedure .................................................................................................................... 423
Functional Test Report .......................................................................................................................... 424
Frequency (81) Test ................................................................................................................................ 427
Functional Test Procedure .................................................................................................................... 427
Functional Test Report .......................................................................................................................... 432
Instantaneous Overcurrent (50) Test .................................................................................................... 435
Functional Test Procedure .................................................................................................................... 435
Functional Test Report .......................................................................................................................... 442
Breaker Fail (50BF) Test ......................................................................................................................... 447
Functional Test Procedure .................................................................................................................... 447
Functional Test Report .......................................................................................................................... 450
Inverse Overcurrent (51) Test ................................................................................................................ 451
Functional Test Procedure .................................................................................................................... 451
Functional Test Report .......................................................................................................................... 461
Directional Overcurrent (67) Test .......................................................................................................... 467
Functional Test Procedure .................................................................................................................... 467
Functional Test Report .......................................................................................................................... 473
Phase Current Differential (87) Test ...................................................................................................... 475
Restrained Functional Test Procedure .................................................................................................. 475
Contents BE1-11g
9424200994 Rev N ix
Unrestrained Functional Test Procedure ............................................................................................... 482
Harmonic Restraint Functional Test Procedure .................................................................................... 482
Functional Test Reports ........................................................................................................................ 484
Neutral Current Differential (87N) Test ................................................................................................. 487
Functional Test Procedure .................................................................................................................... 487
Functional Test Report .......................................................................................................................... 489
Power (32) Test ........................................................................................................................................ 491
Functional Test Procedure .................................................................................................................... 491
Functional Test Report .......................................................................................................................... 494
Loss of Excitation - Reverse Var Based (40Q) Test ............................................................................ 497
Functional Test Procedure .................................................................................................................... 497
Functional Test Report .......................................................................................................................... 499
Distance (21) Test ................................................................................................................................... 501
Pickup Verification ................................................................................................................................. 501
Timing Verification ................................................................................................................................. 502
Functional Test Report .......................................................................................................................... 503
Loss of Excitation – Impedance Based (40Z) Test .............................................................................. 505
Functional Test Procedure .................................................................................................................... 505
Functional Test Report .......................................................................................................................... 507
Out of Step (78OOS) Test ....................................................................................................................... 509
Functional Test Procedure .................................................................................................................... 509
Functional Test Report .......................................................................................................................... 512
Synchronizer (25A) Test ......................................................................................................................... 513
Phase-Lock-Loop (PLL) Functional Test Procedure ............................................................................. 513
Functional Test Report - PLL ................................................................................................................ 518
Anticipatory Functional Test Procedure ................................................................................................ 519
Functional Test Report - Anticipatory .................................................................................................... 523
Voltage Monitor Functional Test Procedure .......................................................................................... 523
Voltage Monitor Functional Test Report ................................................................................................ 526
Virtual Control Switches (43) Test ......................................................................................................... 527
Functional Test Procedure .................................................................................................................... 527
Functional Test Report .......................................................................................................................... 529
Logic Timers (62) Test ............................................................................................................................ 531
Functional Test Procedure .................................................................................................................... 531
Functional Test Report .......................................................................................................................... 539
Lockout Functions (86) Test .................................................................................................................. 541
Functional Test Procedure .................................................................................................................... 541
Functional Test Report .......................................................................................................................... 542
Breaker Control Switch (101) Test ........................................................................................................ 543
Functional Test Procedure .................................................................................................................... 543
Functional Test Report .......................................................................................................................... 544
Frequently Asked Questions (FAQ) ...................................................................................................... 545
Electrical/Connections ........................................................................................................................... 545
General Operation ................................................................................................................................. 545
Features ................................................................................................................................................ 546
Communications .................................................................................................................................... 546
Troubleshooting ...................................................................................................................................... 547
Communications .................................................................................................................................... 547
Inputs and Outputs ................................................................................................................................ 548
Metering/Display .................................................................................................................................... 548
General Operation ................................................................................................................................. 548
BE1-11g Contents
x 9424200994 Rev N
Specifications .......................................................................................................................................... 551
Operational Specifications ..................................................................................................................... 551
General Specifications........................................................................................................................... 562
Specifications - 25 Hz Operation ........................................................................................................... 569
Operational Specifications ..................................................................................................................... 569
Time Curve Characteristics.................................................................................................................... 581
Inverse Overcurrent (51) ....................................................................................................................... 581
Under/Overvoltage (27/59) .................................................................................................................... 609
Overexcitation (24) ................................................................................................................................ 613
RTD Module ............................................................................................................................................. 617
Features ................................................................................................................................................ 617
Functional Description ........................................................................................................................... 617
Mounting ................................................................................................................................................ 618
Connections ........................................................................................................................................... 619
RTD Module Communications Setup Procedure .................................................................................. 622
RTD Module Plugin for BESTCOMSPlus® ............................................................................................ 625
Remote Analog Inputs Configuration .................................................................................................... 630
Remote Analog Outputs Configuration .................................................................................................. 631
Remote RTDs Configuration ................................................................................................................. 632
Specifications ........................................................................................................................................ 633
Repair .................................................................................................................................................... 636
Maintenance .......................................................................................................................................... 636
Storage .................................................................................................................................................. 636
Digital Points ........................................................................................................................................... 637
Revision History ...................................................................................................................................... 651
Contents BE1-11g
9424200994 Rev N 1
Introduction
The BE1-11g Generator Protection System provides flexible, reliable, and economical protection, control,
monitoring, and measurement functions for small, medium, and large generators. The BE1-11g offers
vector jump, out of step, distance, phase and neutral current differential, overexcitation (V/Hz),
overcurrent, directional overcurrent, over/undervoltage, over/underfrequency, RTD (Resistance
Temperature Detector) with remote module, breaker failure, and fuse loss protection. It offers breakerand trip-circuit monitoring, and oscillography and sequential events recording. Control features include
virtual selector switches, circuit breaker control, virtual lockout, and variable-mode timer s. An auto
synchronizer is optional. System metering, status information, and fault locating are available at the
BE1-11g front panel and through the BE1-11g communication ports. The capabilities of the BE1-11g
make it suitable for detecting generator faults and abnormal operating conditions in an integrated system.
Suitable BE1-11g applications include large power generation, distributed generation, local backup
generation, and intertie protection applications.
A front-panel USB port or optional rear Ethernet port enables local communication between the BE1-11g
and a PC operating with BESTCOMSPlus® software. BESTCOMSPlus software simplifies the
commissioning process by providing a graphical interface for setting the BE1-11g and configuring a
protection and control scheme for your application. Through BESTCOMSPlus, all BE1-11g settings and
logic can be retained in a file for printing or uploading to other BE1-11g protection systems. Oscillography
and sequential events records can be retrieved from a BE1-11g, viewed, and printed.
Front-panel features include a large, backlit alphanumeric display and LED indicators that display system
parameters, BE1-11g settings, and BE1-11g status. Pushbuttons enable navigation through the display
menu, changes to settings, resetting of targets (with password access), and direct access to virtual
switches.
Applications
The capabilities of the BE1-11g make it ideally suited for applications with the following attributes:
• Generator specific protection and control elements including loss of field, out of step, stator
ground protection, and sync check or synchronizer
• Generator focused protection including reverse power, negative-sequence, overexcitation, and
differential
• Isolation between the RTDs and the BE1-11g due to distance between the BE1-11g package and
the RTD module
• Low burden to extend the linear range of CTs
• The flexibility provided by wide setting ranges, multiple setting groups, and multiple coordination
curves in one unit
• The economy and space savings provided by a multifunction, multiphase unit. This one unit can
provide all of the protection, control, metering, and local and remote indication functions required
for typical applications.
• Directional control and fault recording
• High-speed Ethernet communications and protocol support
• The capabilities of a numeric multifunction relay
• The small size and limited behind-panel projection facilitates modernizing protection and control
systems in existing equipment
• Detection of low ground current levels (SEF option)
• IEC 61850 functionality
• Logic library with logic schemes for basic low Z grounded generator protection, low Z grounded
generator with sequential trip, low Z grounded generator with sequential trip and sync check,
basic high Z grounded generator protection, high Z grounded generator protection
BE1-11g Introduction
2 9424200994 Rev N
Features
The BE1-11g protection system includes many features for the protection, monitoring, and control of
power system equipment. These features include protection and control functions, metering functions,
and reporting and alarm functions. A highly flexible programmable logic system called BESTlogic™Plus
allows the user to apply the available functions with complete flexibility and customize the system to meet
the requirements of the protected power system. Programmable I/O, extensive communication features,
and an advanced user interface provide easy access to the features provided.
The following information summarizes the capabilities of this multifunction device. Each feature, along
with its setup and use, is described in greater detail in the later chapters of this manual.
General Features
HMI (Human-Machine Interface)
Each BE1-11g has a front-panel display and LED indicators. Protection systems in an H or P style case
have five LED indicators: Power Supply Status, Relay Trouble Alarm, Minor Alarm, Major Alarm, and Trip.
Protection systems in a J style case have 12 LED indicators: Power Supply Status, Relay Trouble Alarm,
Minor Alarm, Major Alarm, Trip, Select Control Switch, Operate Control Switch, and Indicator 1 through 7
(programmable in BESTlogicPlus). The backlit, liquid crystal display (LCD) allows the BE1-11g to replace
local indication and control functions such as panel metering, alarm annunciation, and control switches.
Four scrolling pushbuttons enable navigation through the LCD menu tree. Parameters are changed using
the Edit pushbutton. Targets, alarms, and other registers are cleared with the Reset pushbutton. In Edit
mode, the scrolling pushbuttons provide data entry selections. Edit mode is indicated by an LED on the
Edit pushbutton. Protection systems in a J-style case have pushbuttons for selecting and controlling the
virtual control switches.
The LCD has automatic priority logic to govern which metering values are displayed on the screen so that
when an operator approaches, the metering data of most interest is automatically displayed without
having to navigate the menu structure. Scrollable metering parameters are selected on the General
Settings, Front Panel HMI settings screen in BESTCOMSPlus.
Device Information
The version of the embedded software (firmware), serial number, and style number are available from the
front-panel display or the communication ports.
Three free-form fields (Device ID, Station ID, and User ID) can be used to enter information to identify the
BE1-11g. These fields are used by many of the reporting functions to identify the BE1-11g reporting the
information. Examples of BE1-11g identification field uses include station name, circuit number, relay
system, and purchase order, and others.
Device Security
Passwords provide access security for six distinct functional access areas: Read, Control, Operator,
Settings, Design, and Administrator. Each username/password is assigned an access area with access to
that area and each area below it. An administrator password provides access to all six of the functional
areas.
A second dimension of security is provided by the ability to restrict access for any of the access areas to
only specific communication ports. For example, you could set up security to deny access to control
commands through the Ethernet port.
Security settings affect read and write access. Refer to the Security chapter for more informat ion.
Setting Groups
Four setting groups allow adaptive relaying to be implemented to optimize BE1-11g settings for various
operating conditions. Auto matic and ex terna l log ic ca n be employ e d to select the active setting group.
Introduction BE1-11g
9424200994 Rev N 3
Clock
The clock is used by the logging functions to timestamp events. BE1-11g timekeeping can be selfmanaged by the internal clock or coordinated with an external source through a network or IRIG device.
A backup capacitor and additional battery backup are provided for the clock. During a loss of operating
power, the backup capacitor maintains timekeeping for up to 24 hours depending on conditions. As the
capacitor nears depletion, the backup battery takes over and maintains timekeeping. The backup battery
has a life expectancy of greater than five years depending on conditions.
IRIG
A standard unmodulated IRIG-B input receives time synchronization signals from a master clock.
Automatic daylight saving time compensation can be enabled and set for floating or fixed dates.
NTP (Network Time Protocol)
NTP synchronizes the real-time clock to network time servers through the Ethernet port. BESTCOMSPlus
is used to establish the priority of time reference sources available to the BE1-11g, IRIG-B, NTP, DN P,
and RTC (real-time clock). The NTP address is set using BESTCOMSPlus.
Communications
Three independent communication ports provide access to all BE1-11g functions. A USB (universal serial
bus) port is located on the front panel, a two-wire RS-485 port is located on the rear panel, and an
optional Ethernet port is also located on the rear panel. The RS-485 and Ethernet ports are electrically
isolated.
Modbus™ and DNP3 protocols are optionally available for the RS-485 or Ethernet communication port.
The IEC 61850 protocol is optionally av ai lable for the Ether net port. Sep ar ate instruction manuals cover
each available protocol. Consult the product bulletin or Basler Electric for availability of these options and
instruction manuals. Modbus sessions can be operated simultaneously over the Ethernet and RS-485
ports.
System Parameters
Three-phase currents and voltages are digitally sampled and the fundamental is extracted using a
Discrete Fourier Transform (DFT) algorithm.
The voltage sensing circuits can be configured for single-phase, three-phase-three-wire, or four-wire
voltage transformer circuits. Voltage sensing circuitry provides voltage protection, frequency protection,
polarizing, and watt/var metering. Neutral-shift, positive-sequence, and negative-sequence voltage
magnitudes are derived from the three-phase voltages. Digital sampling of the measured frequency
provides high accuracy at off-nominal values.
An auxiliary voltage sensing input (Vx) provides protection capabilities for over/underv olta ge mon itor ing of
the fundamental and third harmonic voltage of the VT source connected to the Vx input. This capability is
useful for ground fault protection or sync-check functions.
Each current sensing circuit has low burden and is isolated. Neutral, positive-sequence, and negativesequence current magnitudes are derived from the three-phase curr ents . An ind e pend ent ground current
input is available for direct measurement of the current in a transformer neutral, tertiary winding or flux
balancing current transformer. Either one or two sets of CTs are provided in the BE1-11g depending on
the style number. Refer to the style chart for more information.
Programmable Inputs and Outputs
Programmable contact inputs and outputs are described in the following paragraphs.
Programmable Inputs
Programmable contact sensing inputs with programmable signal conditioning provide a binary logic
interface to the protection and control system. Each input function and label is programmable using
BE1-11g Introduction
4 9424200994 Rev N
BESTlogicPlus. A user -meaningful label can be assigned to each input and to each state (energized and
de-energized) for use in reporting functions. Board mounted jumpers support dual voltage ratings.
Protection systems in a J style case are equipped with seven contact sensing inputs. Protection systems
in an H or P style case are equipped with five contact sensing inputs.
Programmable Outputs
Programmable general-purpose contact outputs provide a binary logic interface to the protection and
control system. One programmable, failsafe contact output serves as an alarm output. Each output
function and label is programmable using BESTlogicPlus. A user-meaningful name can be assigned to
each output and to each state (energized and de-energized) for use in reporting functions. Output logic
can be overridden to open, close, or pulse each output contact for testing or control purposes. All output
contacts are trip rated.
Protection systems in a J style case are equipped with eight general-purpose contact outputs. Protection
systems in an H or P style case are equipped with five general-purpose contact outputs.
Reporting and Alarms
Several reporting and alarm functions provide fault reporting, differential reporting, demand, breaker, and
trip circuit monitoring. Reporting of power quality, energy data, and general status is also provided.
Alarms
Extensive self diagnostics will trigger a fatal relay trouble alarm if any of the BE1-11g core functions are
compromised. Fatal relay trouble alarms are not programmable and are dedicated to the Alarm output
(OUTA) and the front panel Relay Trouble LED. Additional relay trouble alarms and all other alarm
functions are programmable for major or minor priority. Programmed alarms are indicated by major or
minor alarm LEDs on the front panel. Major and minor alarm points can also be programmed to any
output contact including OUTA. Over 50 alarm conditions are available to be monitored including userdefinable logic conditions u sing BE STlogicPlus.
Active alarms can be read and reset at the front panel or through the communication ports. A historical
sequence of events report with time stamps lists when each alarm occurred and cleared. These reports
are available through the communication ports.
Breaker Monitoring
Breaker statistics are recorded for a single breaker. They include the number of operations, fault current
interruption duty, and breaker time to trip. Each of these conditions can be set to trigger an alarm.
Trip Circuit Monitor (52TCM)
The trip circuit of a breaker or lockout relay can be monitored for loss of voltage (fuse blown) or loss of
continuity (trip coil open). Additional trip or close circuit monitors can be implemented in BESTlogicPlus
using additional inputs, logic timers, and programmable logic alarms.
Demands
Demand values are continuously calculated for phase currents, neutral current, negative-sequence
current, ground current, real power, reactive power, and apparent power. The demand interval and
demand calculation method are independently settable for phase, neutral, and negative-sequence
measurements. Demand reporting records peak and present demand with time stamps for each register.
Power Quality
The BE1-11g offers IEC 61000-4-30 Class B power quality measurement performance. Power quality
settings include a fixed or sliding reference mode, dip hysteresis, dip ratio, swell hysteresis, and swell
ratio.
Energy Data Reporting
Energy information in the form of watthours and varhours is measured and reported by the BE1-11g. Both
positive and negative values are reported in three-phase, primary units.
Introduction BE1-11g
9424200994 Rev N 5
General Status Reporting
The BE1-11g provides extensive general status reporting for monitoring, commissioning, and
troubleshooting. Status reports are available from the front-panel display or communication ports.
Fault Reporting
Fault reports consist of simple target information, fault summary reports, and detailed oscillography
records to enable the user to retrieve information about disturbances in as much detail as is desired. The
BE1-11g records and reports oscillography data in industry-standard IEEE, COMTRADE format to allow
using any fault analysis software. Basler Electric provides a Windows
BESTwave™ that can read and plot binary or ASCII format files that are in the COMTRADE format. A
copy of BESTwave is included on the BE1-11 product CD.
Sequence of Events Recorder
A Sequence of Events Recorder (SER) records and time stamps all BE1-11g inputs and outputs as well
as all alarm conditions monitored by the BE1-11g. Time stamp resolution is to the nearest half-cycle. I/O
and Alarm reports can be extracted from the records as well as reports of events recorded during the time
span associated with a specific fault report.
® based program called
Protection and Control
Protection functions consist of Overexcitation, Sync-Check, Undervoltage, Overvoltage, Vector Jump,
Frequency, Instantaneous Overcurrent, Breaker Failure, Inverse Overcurrent, Phase Current Differential
(optional), Neutral Current Differe nti al (optional), Power, Loss of Excitation, Distance, Out of Step,
Thermal, and Analog protection. Virtual Control Switches, Timers, a Lockout Function, a Breaker Control
Switch, and an Auto Synchronizer (optional) make up the control functions. The following paragraphs
describe each protection and control function.
Overexcitation (24) Protection
One volts per hertz protection element provides overexcitation protection for a generator and/or
transformer.
Sync-Check (25) Protection
With the auxiliary voltage input connected to the bus, one sync-check function provides synchronism
protection. Sync-check protection checks for phase angle difference, magnitude difference, frequency
difference (slip) and, optionally, if the three-phase VT frequency is greater than the auxiliary VT
frequency. One voltage monitor output (25VM) provides independent dead/live voltage closing logic.
Undervoltage (27P) and Overvoltage (59P) Protection
Five phase undervoltage and four phase overvoltage elements are included. Phase
undervoltage/overvoltage protection can be set for one of three, two of three, or three of three logic.
When a four-wire voltage transformer connection is used, under/overvoltage protection can be set for
either phase-to-phase voltage or phase-to-neutral voltage. The 27P elements are equipped with an
undervoltage inhibit feature. Inverse or definite time can be selected. Refer to the T ime Cur ve
Characteristics chapter.
Auxiliary Undervoltage (27X) and Auxiliary Overvoltage (59X) Protection
Four auxiliary overvoltage and four auxiliary undervoltage elements provide over/undervoltage protection.
Auxiliary voltage protection elements can be set to individually monitor the third harmonic, neutral-shift,
positive-sequence, negative-sequence, or auxiliary fundamental voltages. Ground unbalance protection is
provided when the auxiliary voltage input is connected to a source of 3V0 such as a broken-delta VT. The
27X is equipped with an undervoltage inhibit feature. Inverse or definite time can be selected. Refer to the
Time Curve Characteristics chapter.
BE1-11g Introduction
6 9424200994 Rev N
Note
Vector Jump (78) Protection
One vector jump protection element protects the generator by disconnecting it from the grid when a loss
of mains or mains failure occurs, preventing the generator from remaining tied to the mains if the mains
returns due to an external reclose device.
Frequency (81) Protection
Eight independent frequency elements can be set for over, under, or rate of change (81R) frequency
operation. Each can be individually set to monitor the frequency on the main three-phase voltage input or
the Vx input. Rate of change can be set to operate on positive, negative, or “either”.
BE1-11g protection systems enabled for IEC-61850 communication
(style Gxxxx5xxxxxxxx) have their frequency protection elements fixed
at four underfrequency elements, two overfrequency elements, and
two frequency rate-of-change elements.
Instantaneous Overcurrent (50) Protection
Directional overcurrent protection is provided by six instantaneous overcurrent elements. Digital signal
processing filters out unwanted harmonic components while providing fast overcurrent response with
limited transient overreach and overtravel.
Instantaneous overcurrent elements can be set for single-phase, three-phase, ground, neutral, positivesequence, negative-sequence, or unbalanced protection.
Breaker Failure (50BF) Protection
One breaker failure function provides protection and security for the power system against failure of the
monitored breaker.
Inverse Overcurrent (51) Protection
Seven inverse overcurrent elements can be set for single-phase, three-phase, ground, neutral, positivesequence, negative-sequence, or unbalanced protection. Inverse-overcurrent functions employ a dynamic
integrating timing algorithm covering a range from pickup to 40 times pickup with selectable
instantaneous or integrated reset characteristics. Inverse time overcurrent curves conform to IEEE Std
C37.112-1996 - IEEE Standard Inverse-Time Characteristic Equations for Overcurrent Relays, and
include seven curves similar to Westinghouse/ABB CO curves, five curves similar to GE IAC curves, a
fixed time curve, and a user programmable curve. Refer to the Time Curve Characteristics chapter for
more information about the inverse over cur r ent protec t i on characteristic curves.
Phase inverse overcurrent elements can be voltage restrained or controlled for generator backup
applications. Negative-sequence current protection (46) is included as a mode of the 51 (inverse
overcurrent) element. Each inverse overcurrent element can be individually set for forward, reverse, or
non-directional control.
A separate ground current input provides ground overcurrent protection for a separate ground CT.
Optionally, an SEF (sensitive earth fault) version of the separate ground CT is available.
Phase Current Differential (87) Protection (style GxxxxxxxPxxxxx o r GxxxxxxxTxxxxx)
One phase current differential element provides three-phase, percent age-restrained, differential
protection with dual-s lo pe, i n-phase, differential mode. In flux balance mode, the differential CTs are
connected in a flux balancing configuration.
Neutral Current Differ e nti al (87N) Protection (style GxxxxxxxPxxxxx or GxxxxxxxTxxxxx)
One neutral current differential element provides sensitive phase-to-ground fault differential protection for
the wye winding of the transformer.
Introduction BE1-11g
9424200994 Rev N 7
Note
Power (32) Protection
Two directional power elements are included in the BE1-11m and can be set for forward or reverse,
overpower or underpower protection. The element can be used for any application requiring directional
power flow detection including intertie protection (interconnects between an electric utility and a source of
non-utility generation). The power measurement algorithm is adapted as appropriate for any possible
three-phase or single-phase voltage transformer connection. Directional power is calibrated on a threephase basis regardless of the voltage transformer connection used. Directional Power Protection can be
set for one of three, two of three, three of three, or total power.
BE1-11g protection systems enabled for IEC-61850 communication
(style Gxxxx5xxxxxxxx) have their power protection elements fixed at
one underpower element and one overpower element.
Loss of Excitation - Reverse Var Based (40Q) Protection
One loss of excitation element monitors three-phase reactive power (vars) to determine when a loss of
field condition exists.
Loss of Excitation - Impedance Based (40Z) Protection
One loss of excitation element implements a two zone offset mho characteristic to protect against varying
load conditions.
Distance (21) Protection
Two distance protection elements provide backup protection for external faults that are not cleared by
external protective relaying due to a failure of the external system protection scheme or equipment.
Settings are provided to configure a zone of reach using a mho circle.
Out of Step (78OOS) Protection
When a generator loses synchronism, high peak currents and off-frequency operation can cause winding
stress, high rotor iron currents, pulsating torques, and mechanical resonances that may be damaging to
the machine. The out of step element monitors the generator or step-up transformer terminals and detects
an out-of-step condition based on the rate of impedance change.
Resistance Temperature Detector (49RTD) Protection
Fourteen resistance temperature detector elements provide over/undertemperature protection in
applications where a remote RTD module is connected to the BE1-11g via Ethernet or RS-485 cable. For
more information, refer to the RTD Module chapter.
Analog Input Protection
Eight analog input protection elements monitor external analog input signals when two remote RTD
modules are connected via an Ethernet or RS-485 cable. Four analog inputs are provided with each RTD
module. For more information, refer to the RTD Module chapter.
Fuse Loss (60FL)
A fuse loss element protects against false tripping due to a loss of voltage sensing. Voltage transformer
circuit monitoring adds security by detecting problems in the voltage transformer sensing circuits and
preventing mis-operations of the 25, 27P, 47, 59P, and 51/27 functions.
Auto Synchronizer (25A) (style GxxxxxxxSxxxxx or GxxxxxxxTxxxxx)
An auto synchronizer element synchronizes a generator to a bus by matching the voltage, frequency, and
phase angle. Modes are provided for Phase Lock Loop or Anticipatory operation.
BE1-11g Introduction
8 9424200994 Rev N
Breaker Control Switch (101)
Tripping and closing of a selected breaker can be controlled by the virtual breaker control switch. The
virtual breaker control switch is accessed locally at the front panel or remotely through the communication
ports.
Virtual Control Switches (43)
Five virtual control switches are accessed locally at the front panel or remotely through the
communication ports. Virtual switches can be used to trip and close additional switches or breakers, or
enable and disable certain functions.
Logic Timers (62)
Eight logic timers with six modes of operation emulate virtually any type of timer.
Lockout Functions (86)
Two lockout elements are provided.
BESTlogic™Plus Programmable Logic
Each BE1-11g protection and control function is implemented in an independent function element. Every
function block is equivalent to its single function, discrete device counterpart so it is immediately familiar
to the protection engineer. Each independent function block has all of the inputs and outputs that the
discrete component counterpart may have. Progr a mm i ng with BEST logicPlus is equivalent to choosing
the devices required by your protection and control scheme and then drawing schematic diagrams to
connect the inputs and outputs to obtain the desired operating logic.
Refer to the BESTlogicPlus chapter for more information on logic schemes. Custom logic settings allow
you to tailor the BE1-11g functionality to match the needs of your operation's practices and power system
requirements.
Metering Functions
Metering is provided for the following parameters:
• Primary and secondary voltages (P-P, P-N, V1, V2, 3V0, Vx, Vx 3
• Frequency (phase and auxiliary)
• Primary and secondary currents (phase, ground, I1, I2, 3I0)
• Power (real, reactive, app a r ent)
• Power factor
nd
• Phase differential (Iop, Ir, 2
Harmonic, 5th Harmonic)
• Neutral differential (Iop)
• Energy (total watthours and total varhours)
For details on metering functions, refer to the Metering chapter.
rd
harmonic)
Model and Style Number Description
BE1-11g electrical characteristics and operational features are defined by a combination of letters and
numbers that make up the style number. The style number describes the options included in a specific
device and appears on labels located on the front panel and inside the case. Upon receipt of a BE1-11g,
be sure to check the style number against the requisition and the packing list to ensure that they agree.
The model number and style number are shown in Figure 1.
Introduction BE1-11g
9424200994 Rev N 9
Figure 1. Style Chart
BE1-11g Introduction
10 9424200994 Rev N
Introduction BE1-11g
9424200994 Rev N 11
Note
Quick Start
This chapter provides basic installation and setup information about the BE1-11g Gener ator Pr ot ec tio n
System. BE1-11g protection systems are delivered with a BE1-11 product CD. Upon receipt of the
BE1-11g, check the model and style number against the requisition and packing list for agreement. If
there is evidence of shipping damage, file a claim with the carrier, and notify the Basler Electric Regional
Sales Office, your sales representative, or a sales representative at Basler Electric, Highland, Illinois.
If the BE1-11g is not installed immediately, store it in the original shipping carton in a moisture- and dustfree environment.
Included on the BE1-11 product CD:
• BESTCOMSPlus® Software
• BESTwave™ Software
• BEST61850™ Software
• Quick Start Guide
• Communications Quick Start Guide
• Instruction Manual
• Modbus™ Instruction Manual
• DNP Instruction Manual
• IEC 61850 Instruction Manual
Do not connect a USB cable between the PC and the BE1-11g until
BESTCOMSPlus is installed. Connecting a USB cable before setup is
complete may result in errors.
Maintenance
Preventive maintenance consists of periodic replacement of the backup battery and periodically checking
that the connections between the BE1-11g and the system are clean and tight. The front cover should be
removed only when replacing the backup battery for the real-time clock. Ensure that the BE1-11g is
powered off and taken out of service before removing the front cover. BE1-11g units are manufactured
using state-of-the-art, surface-mount technology. As such, Basler Electric recommends that no repair
procedures be attempted by anyone other than Basler Electric personnel.
Storage
This device contains long-life aluminum electrolytic capacitors. For devices that are not in service (spares
in storage), the life of these capacitors can be maximized by energizing the device for 30 minutes once
per year.
Install BESTCOMSPlus® Software
BESTCOMSPlus software is built on the Microsoft® .NET Framework. The setup utility that installs
BESTCOMSPlus on your PC also installs the BE1-11 plugin and the required version of .NET Framework
(if not already installed). BESTCOMSPlus operates with systems using Windows® XP 32-bit SP3,
Windows Vista 32-bit SP1 (all editions), Windows 7 32-bit (all editions), Windows 7 64-bit (all editions),
and Windows 8. System recommendations for the .NET Framework and BESTCOMSPlus are listed in
Table 1.
BE1-11g Quick Start
12 9424200994 Rev N
System Type
Component
Recommendation
32/64 bit
Processor
2.0 GHz
32/64 bit
RAM
1 GB (minimum), 2 GB (recommended)
32 bit
Hard Drive
100 MB (if .NET Framework is already installed on PC)
950 MB (if .NET Framework is not already installed on PC)
64 bit
Hard Drive
100 MB (if .NET Framework is already installed on PC)
2.1 GB (if .NET Framework is not already installed on PC)
Table 1. System Recommendations for BESTCOMSPlus and the .NET Framework
To install BESTCOMSPlus, a Windows user must have Administrator rights.
1. Insert the BE1-11 product CD into the PC CD-ROM drive.
2. When the BE1-11 Product CD menu appears, click the installation button for BESTCOMSPlus. The
setup utility installs BESTCOMSPlus, the .NET Framework (if not already installed), the USB driver,
and the BE1-11 plugin for BESTCO M SPlus on your PC.
When BESTCOMSPlus installation is complete, a Basler Electric folder is added to the Windows
programs menu. This folder is accessed by clicking the Windows Start button and then accessing the
Basler Electric folder in the Programs menu. The Basler Electric folder contains an icon that starts
BESTCOMSPlus when clicked.
Power Up and Activate the BE1-11 Plug-In
The BE1-11 plugin is a module that runs inside the BESTCOMSPlus shell. The BE1-11 plugin contains
specific operational and logic settings for only BE1-11 protection systems. Uploading settings to the
BE1-11g is possible only after activating the BE1-11 plugin.
Note that if a protection system is not connected, you will not be able to configure certain Ethernet
settings. Ethernet settings can be changed only when an active USB or Ethernet connection is present.
Refer to the Communication chapter for more information.
USB Connection
The USB driver was copied to your PC during BESTCOMSPlus installation and is
installed automatically after powering the BE1-11g. USB driver installation progress is
shown in the Windows Taskbar area. Windows will notify you when installation is
complete.
Connect a USB cable between the PC and your BE1-11g protection system. A typical
USB cable with a B-type connector is shown to the right.
NOTE
In some instances, the Found New Hardware Wizard will prompt you for the
USB driver. If this happens, direct the wizard to the following folder:
C:\Program Files\Basler Electric\USB Device Drivers\
Apply Operating Power
The nominal power supply values are listed on the front-panel label. See Figure 2 for an example.
Quick Start BE1-11g
9424200994 Rev N 13
ETHERNET
!
WARNING
BE1-11
C12C11C10C9C8C7C6C5C4C3C2C1 C13 C14 C15 C16 C17 C18
V
A
OUT 2 OUT 3 OUT 4 OUT 5OUT 1 ALARM VBV
C
V
X
VXN
E12E11E10E9E8E7E6E5E4E3E2E1
OUT 8 OUT 7
IN5 IN6
IN7
OUT 6
A8A7A6A5A4A3A2A1
IRIG PWR
CA B
COM2 RS-485
GND
B8B7B6B5B4B3B2B1
IN1 IN2
IN3
IN4
D1 D3 D5 D7
IA1IB1IC1I
G1
I
A1
D2 D4 D6 D8
IB1IC1I
G1
I
A2
F2 F4 F6 F8
IB2IC2I
G2
F1 F3 F5 F7
IA2IB1IC2I
G2
P0061-43
Figure 2. Front Panel Label Example
Connect rear terminals A6, A7, and A8 (groun d) to a power supp ly. Figure 3 shows the rear terminals of
the BE1-11g in a J type case. Figure 4 shows the rear terminals of the BE1-11g in an H or P type case.
Apply operating power consistent with the nominal power supply values listed on the front-panel label.
Wait until the boot sequence is complete.
BE1-11g Quick Start
Figure 3. PWR Rear Terminals (J Type Case)
14 9424200994 Rev N
P0069-28
Basler Electric
Highland, Illinois USA (618) 654-2341
Figure 4. PWR Rear Terminals (H or P Type Case)
Start BESTCOMSPlus® and Activate BE1-11 Plugin
To start BESTCOMSPlus, click the Start button, point to Programs, Basler Elec tric, and then click the
BESTCOMSPlus icon. During initial startup, the BESTCOMSPlus Select Language screen is displayed
(Figure 5
can select a preferred language and this screen will be bypassed in the future. Click OK to continue. This
screen can be accessed later by selecting Tools and Select Language from the menu bar.
The BESTCOMSPlus splash screen is shown for a brief time. See Figure 6.
The BESTCOMSPlus platform window opens. Select New Connection from the Communication pull-down
menu and select BE1-11. See Figure 7. The BE1-11 plugin is activated automatically after connecting to a
BE1-11g.
). You can choose to have this screen displayed each time BESTCOMSPlus is started, or you
Figure 5. BESTCOMSPlus Select Language Screen
The BE1-11 Connection screen shown in Figure 8 appears. Select USB Connection and then click the
Connect button.
Quick Start BE1-11g
9424200994 Rev N 15
Figure 6. BESTCOMSPlus Splash Screen
Figure 7. Communication Pull-Down Menu
Figure 8. BE1-11 Connection Screen
The BE1-11 plugin opens indicating that activation was successful. You can now configure the BE1-11g
communication ports and other BE1-11g settings.
BE1-11g Quick Start
16 9424200994 Rev N
Programming the BE1-11g
This section contains an introduction to BESTCOMSPlus, explains summary screens, and gives an
example of settings elements and programming logic.
Introduction to BESTCOMSPlus®
BESTCOMSPlus is a Windows®-based, PC application that provides a user-friendly, graphical user
interface (GUI) for use with Basler Electric communicating products. The name BESTCOMSPlus is an
acronym that stands for Basler Electric Software Tool for Communications, Operations, Maintenance, and
Settings.
BESTCOMSPlus provides the user with a point-and-click means to set and monitor the BE1-11g. The
capabilities of BESTCOMSPlus make the configuration of one or several BE1-11g Generator Protection
Systems fast and efficient. A primary advantage of BESTCOMSPlus is that a settings scheme can be
created, saved as a file, and then uploaded to the BE1-11g at the user’s convenience.
The BE1-11 plugin opens inside the B ESTCO M S Plus main shell. The same default logic scheme that is
shipped with the BE1-11g is brought into BESTCOMSPlus by downloading settings and logic from the
BE1-11g or by selecting application type “G” on the Style Number screen. This gives the user the option
of developing a custom setting file by modifying the default logic scheme or by building a unique scheme
from scratch.
BESTlogic™Plus Programmable Logic is used to program BE1-11g logic for protection elements, inputs,
outputs, alarms, etc. This is accomplished by the drag-and-drop method. The user can drag elements,
components, inputs, and outputs onto the program grid and make connections between them to create
the desired logic scheme.
BESTCOMSPlus also allows for downloading industry-standard COMTRADE files for analysis of stored
oscillography data. Detailed analysis of the oscillography files can be accomplished using BESTwave
software.
Figure 9 illustrates the typical user interface components of the BE1-11 plugin with BESTCOMSPlus.
Figure 9. BESTCOMSPlus Typical User Interface Components
Click the View drop-down button to switch between the Settings Explorer and Metering Explorer or split
the view between both. The Settings Info Panel displays settings ranges. A workspace can be opened,
saved, or set as default. See Figure 10.
Quick Start BE1-11g
9424200994 Rev N 17
Figure 10. View Drop-Down Button
Summary Screens
Summary screens provide an overview of the system setup. The legend, located in the lower right-hand
corner, provides interpretation for the various indicated colors. The current state of a protection and
control function or element is indicated by the color of the adjacent indicator. If the function is enabled, the
color is green. If the function is disabled only by a setting (such as zero), the color is yellow. If the function
is disabled only by a mode, the color is blue. If the function is disabled by both a setting and mode, the
color is gray. The System Summary screen is available by clicking BE1-11 in the Settings Explorer as
shown in Figure 11. Summary screens are also available for General Settings, Alarm Configuration,
Protection, and Control.
Figure 11. System Summary Screen
BE1-11g Quick Start
18 9424200994 Rev N
Programming Example
Changing default logic is sometimes required to match the protection requirements of the system.
Additionally, elements must be enabled and operating settings set. This example demonstrates how to
configure typical nominal settings and program the 50-3 instantan eous ov erc ur rent elem ent. Sy s tem
nominal quantities are set to 69.3 volts and 3.6 amps. The 50-3 element is set for a 5.62 amp pickup and
a 30 second time delay. Additionally, the element pickup output is logically wired to output 4 and a user
alarm.
Step 1: Star t BE ST C OMSPlus and select New Connection, BE1-11 from the Communication pull-down
menu to connect to the BE1-11g. See Figure 7.
Step 2: The BE1-11 Connection screen appears. See Figure 8. Select USB Connection and click
Connect.
Step 3: Select Download Settings and Logic from Device from the Communication pull-down menu. This
copies all settings and logic from the BE1-11g to BESTCOMSPlus.
Step 4: Click on the View drop-down button and de-select Show Metering Panel and Show Setting
Information. See Figure 10. This maximizes the workspace.
Step 5: In the Settings Explorer, click the “+” next to BE1-11. This expands the sub menus in the tree.
Now expand System Parameters and select the Power System screen. See Figure 12.
Step 6: Under Nominal Settings, enter settings for Secondary Phase Voltage (69.3 V) and Secondary
Phase Current (3.6 A).
Figure 12. Power System Screen
Step 7: In the Settings Explorer, expand Protection, Current and select the Instantaneous Overcurrent
(50-3) screen. See Figure 13.
Step 8: Select the Mode (3 Phase) and enter settings for Pickup (5.62 A) and Time Delay (30,000 ms).
Step 9: In the Settings Explorer, click BESTlogicPlus Programmable Logic to open the logic diagram.
Click the Logic Page 1 tab. See Figure 14. Examine the 50-3 element. The Logic 0 connected to
the Block input indicates that the 50-3 element is never blocked.
Off-Page Inputs/Outputs are used to make connections between logic pages and help keep logic
diagrams free from clutter. The Trip output is connected to an Off-Page Output named 50-3 Trip.
This 50-3 Trip Off-Page Output is carried over to the Logic Page 2 tab (Figure 15) where it
becomes an Off-Page Input. The 50-3 Trip Off-Page Input and several others are AND gated to
the Trip Bus Off-Page Output which is carried over to the Logic Page 3 tab (Figure 16) where it
Quick Start BE1-11g
9424200994 Rev N 19
becomes an Off-Page Input. The Trip Bus Off-Page Input in connected to physical Output 1 on
the BE1-11g. Therefore, the OUT1 contacts operate when the 50-3 element is tripped.
Figure 13. Instantaneous Overcurrent (50-3) Screen
Figure 14. BESTlogicPlus Logic Page 1
BE1-11g Quick Start
20 9424200994 Rev N
Figure 15. BESTlogicPlus Logic Page 2
Figure 16. BESTlogicPlus Logic Page 3
Step 10: In this step, the Pickup output of the 50-3 element is connected to Output 4. When the Pickup
output of the 50-3 element is true, the label of Output 4 is displayed in the fault report and/or
sequence of events report. The label is named in Step 12. Click the Logic Page 1 tab and then
click the I/O tab at the bottom. Expand Output Objects and then Physical Outputs. Click and
drag OUT4 over to the logic diagram. Click on the Pickup output of the 50-3 element and drag it
to the input of OUT4 to make a connection. Refer to Figure 17.
Quick Start BE1-11g
9424200994 Rev N 21
Figure 17. BESTlogicPlus Programming OUT4
Step 11: In this step, the Pickup output of the 50-3 element is connected to User Alarm 1. When the
Pickup output of the 50-3 element is true, the label of the user alarm is displayed on the Alarms
screen on the front-panel display and in the fault report and/or sequence of events report. The
label is named in Step 13. Click the Logic Page 1 tab and then click the Elements tab at the
bottom. Locate the User Alarm 1 element. Click and drag USERALM1 over to the logic diagram.
Click on the Pickup output of the 50-3 element and drag to the input of USERALM1 to make a
connection. Refer to Figure 18.
Figure 18. BESTlogicPlus Programming User Alarm 1
Step 12: Click the Save button to save the logic to BESTCOMSPlus memory for later inclusion in the
settings file. See Figure 19.
BE1-11g Quick Start
22 9424200994 Rev N
Figure 19. BESTlogicPlus Toolbar
Step 13: In the Settings Explorer, expand Programmable Outputs, Contact Outputs, and name Output #4
(50-3 Pickup) as shown in Figure 20.
Figure 20. Contact Outputs Screen
Step 14: In the Settings Explorer, expand Alarm Configuration, User Programmable Alarms, and name
User Programmable Alarm #1 (50-3 Pickup) as shown in Figure 21.
Step 15: Figure 22 shows the user-defined labels of OUT4 and USERALM1 that were named in Step 13
and Step 14.
Step 16: Select Save from the File pull-down menu to save your new settings file.
Step 17: To make your new settings active in the BE1-11g, select Upload Settings and Logic to Device
from the Communication pull-down menu. Enter the username and password.
Quick Start BE1-11g
9424200994 Rev N 23
Figure 21. User Programmable Alarms Screen
Figure 22. OUT4 and USERALM1 with User-Defined Labels
BE1-11g Quick Start
24 9424200994 Rev N
Quick Start BE1-11g
9424200994 Rev N 25
Controls and Indicators
BE1-11g controls and indicators are located on the front panel and include sealed membrane switches,
LED (light emitting diode) indicator lamps, and a multiple-line, alphanumeric LCD (liquid crystal display).
Illustrations and Descriptions
The HMI (Human-Mac hine I nterfac e) of a BE1-11g in a J type case is illustrated in Figure 23 and
described in Table 2. The locators and descriptions of Table 2 correspond to the locators shown in
Figure 23.
Figure 23. Front Panel (J Type Case)
BE1-11g Controls and Indicators
26 9424200994 Rev N
Locator
Description
A
Power Indicator – This green LED lights when operating power is applied to the BE1-11g.
B
Relay Trouble Indicator – This red LED lights momentarily during start-up and lights
provides a complete description of all BE1-11g failure alarm diagnostics.
C, D
Minor Alarm, Major Alarm Indicators – These red LEDs light to indicate that a programmable
conditions. The Alarms chapter provides detailed information about programming alarms.
E
Trip Indicator – A flashing red Trip LED indicates that a protective element is picked up. A
protective trip has occurred and targets are dis play ed.
F
Display – 64 x 128 dot pixels liquid crystal display (LCD) with backlighting. The LCD is the
displayed in a menu.
G
Indicators – These red LEDs are programmable through BESTlogic™Plus. An indicator label
Indicator status is also available through the Metering Explorer in BESTCOMSPlus®.
H
Reset Pushbutton – Pressing this button resets the Trip LED, sealed-in Trip Targets, Peak
Demand Currents, and Alarms.
I
Operate Control Switch – This pushbutton operates a 43 virtual control switch after it has
chapter for more information about the control switches.
J
USB – This universal serial bus port is used to communicate with the BE1-11g using
BESTCOMSPlus.
K
Identification Label – This label lists the style number, serial number, sensing input current
announcements.
L
Select Control Switch – This pushbutton selects an enabled 43 virtual control switch. The
Virtual Control Switches (43) chapter for more information about the control switches.
M
Edit Pushbutton – Settings changes are made at the front panel using this pushbutton.
Access Error.
N
Scrolling Pushbuttons – Use these four switches to navigate (UP/DOWN/LEFT/RIGHT)
change the variable.
Table 2. Front Panel Descriptions (J Type Case)
continuously when a BE1-11g failure is detected. The Contact Inputs and Outputs chapter
alarm has been set. Each indicator can be programmed to annunciate one or more
continuously lit LED indicates that a trip output is closed. This red LED is sealed in if a
primary source for obtaining information from the BE1-11g or when locally setting the
BE1-11g. Information such as targets, metering values, demand values, communication
parameters, and diagnostic information is provided by the LCD. Information and settings are
can be attached next to each LED. Labels of typical system conditions are provided. Refer
to the BESTlogicPlus chapter for information on assigning logic elements to LED indicators.
been selected using the Select Control Switch (L). Refer to the Virtual Control Switches (43)
and voltage range, and power supply input voltages. The QR (Quick Response) code is
read by an imaging device, such as a camera on a mobile phone or tablet. If an internet
connection is available, you will be directed to the BE1-11g mobile web page where you can
access this instruction manual, frequently asked questions, and a basic troubleshooting
guide. You can also contact technical support and subscribe to Basler Electric product email
Operate Control Swit c h (J) operates the switch after it has been selected. Refer to the
When pushed, this switch lights to indicate that Edit mode is active. When you are finished
making settings changes (using the scrolling pushbuttons) and the Edit switch is pressed
again, the switch light turns off to indicate that your settings changes have been saved. If
changes are not completed and saved before the access timeout length setting expires, the
BE1-11g will automatically exit the Edit mode without saving any changes and announce an
through the LCD menu tree. When in Edit mode, the LEFT and RIGHT scrolling
pushbuttons select the variable to be changed. The UP and DOWN scrolling pushbuttons
The front-panel interface of a BE1-11g in a H or P type case is illustrated in Figure 24 and described in
Table 3. The locators and descriptions of Table 3 correspond to the locators shown in Figure 24.
Controls and Indicators BE1-11g
9424200994 Rev N 27
Locator
Description
A
Display – 64 x 128 dot pixels liquid crystal display (LCD) with backlighting. The LCD is the
displayed in a menu.
B
Power Indicator – This green LED lights when operating power is applied to the BE1-11g.
C
Relay Trouble Indicator – This red LED lights momentarily during start-up and lights
provides a complete description of all BE1-11g failure alarm diagnostics.
D, E
Minor Alarm, Major Alarm Indicators – These red LEDs light to indicate that a programmable
conditions. The Alarms chapter provides detailed information about programming alarms.
F
Trip Indicator – A flashing red Trip LED indicates that a protective element is picked up. A
protective trip has occurred and targets are dis play ed.
G
USB – This universal serial bus port can be used to communicate with the BE1-11g using
BESTCOMSPlus.
H
Reset Pushbutton – Pressing this button resets the Trip LED, sealed-in Trip Targets, Peak
Demand Currents, and Alarms.
I
Scrolling Pushbuttons – Use these four switches to navigate (UP/DOWN/LEFT/RIGHT)
change the variable.
Figure 24. Front Panel (H or P Type Case)
Table 3. Front Panel Descriptions (H or P Type Case)
primary source for obtaining information from the BE1-11g or when locally setting the
BE1-11g. Information such as targets, metering values, demand values, communication
parameters, and diagnostic information is provided by the LCD. Information and settings are
continuously when a BE1-11g failure is detected. The Contact Inputs and Outputs chapter
alarm has been set. Each indicator can be programmed to annunciate one or more
continuously lit LED indicates that a trip output is closed. This red LED is sealed in if a
through the LCD menu tree. When in Edit mode, the LEFT and RIGHT scrolling
pushbuttons select the variable to be changed. The UP and DOWN scrolling pushbuttons
BE1-11g Controls and Indicators
28 9424200994 Rev N
Locator
Description
J
Edit Pushbutton – Sett ings changes are made at the front panel using this pushbutton.
Access Error.
K
Identification Label – This label lists the style number, serial number, sensing input current
announcements.
BE1-11
g
BE
1-11 Menu
Metering
Settings
Metering Explorer
Analog Metering
Status
Reports
Demand Meter
Power Quality
Control
P
0069-40
Settings Explorer
General Settings
Communication
System Parameters
Input Contacts
Analog Inputs
RTD Types
Analog Outputs
Alarm Configuration
Metering Configuration
Protection
Control
Logic
GENERATOR
PROTECTION SYSTEM
When pushed, this switch lights to indicate that Edit mode is active. When you are finished
making settings changes (using the scrolling pushbuttons) and the Edit switch is pressed
again, the switch light turns off to indicate that your settings changes have been saved. If
changes are not completed and saved before the access timeout length setting expires, the
BE1-11g will automatically exit the Edit mode without saving any changes and announce an
and voltage range, and power supply input voltages. The QR (Quick Response) code is
read by an imaging device, such as a camera on a mobile phone or tablet. If an internet
connection is available, you will be directed to the BE1-11g mobile web page where you can
access this instruction manual, frequently asked questions, and a basic troubleshooting
guide. You can also contact technical support and subscribe to Basler Electric product email
Menu Navigation
A menu tree with a Metering branch and a Settings branch can be accessed through the front-panel
controls and display. A greater level of detail in a menu branch is accessed using the right scrolling
pushbutton. The left scrolling pushbutton is used to return to the top of the menu branch.
Figure 25 illustrates the organization of the front-panel display menu tree structure.
Figure 25. Front-Panel Display Menu Tree Layout
Front Panel Operations
The following paragraphs describe how the front-panel interface is used to set and control BE1-11g
functions.
Entering Usernames and Passwords
If password security has been initiated for a function, the front-panel display will prompt you to enter a
username and password when the Edit pushbutton is pressed. To gain access, you must enter the
appropriate username and pas s word. Y ou can enter usernames and passwords by performing the
following procedure:
Controls and Indicators BE1-11g
9424200994 Rev N 29
1. Press the Edit pushbutton.
2. Enter the username by pressing the UP or DOWN scrolling pushbuttons until the proper first
character of the username appears. Pressing the UP pushbutton scrolls through the alphabet and
then the numbers in ascending order. Pressing DOWN scrolls through the numbers and then the
alphabet in descending order.
3. Press the RIGHT scrolling pushbutton to move the cursor to the next character of the username
and select the appropriate character.
4. Continue the process until the entire username has been spelled out. Press the Edit pushbutton
when finished.
5. Repeat Steps 2 through 4 for the password.
6. Press the Edit pushbutton.
7. If the proper username and password have been entered, the screen will flash the type of access
that has been granted. If an incorrect password has been entered, the screen will flash “Read
Access”.
8. Once you gain access, it remains in effect until the access timeout length setting expires. As long
as you continue to press the Edit key for a function for which you have gained access, the fiveminute timer will be refreshed and you will not be prompted for a password.
To close access immediately, press the Reset button while any non-settings screen is displayed. The
BE1-11g should flash “Read Only” on the LCD screen to indicate access through the front panel has been
terminated.
Entering Settings
Settings for protection functions can be edited by using the RIGHT, LEFT, UP, and DOWN front-panel
navigation keys. Navigate to Settings, Protection.
To edit a setting using the manual scrolling pushbuttons, perform the following procedures:
1. After scrolling to the desired settings group and element category, scroll to the screen that
displays the function to be edited.
2. Press the Edit pushbutton to gain access. If password security has been initiated for settings, you
will be prompted to enter the appropriate username and password. See the paragraphs, Entering
Usernames and Passwords , for details on entering usernames and passwords from the front
panel. Once access has been gained, the Edit LED will be lit and a cursor will appear in the first
settings field on the screen.
3. Press the UP or DOWN scrolling key to select the desired setting. Some settings require entering
a number one character at a time. For example, to enter a 51-1 pickup as 7.3 amps, you would
place the cursor in the PU field and press the UP pushbutton until the 7 is showing. Then press
the RIGHT pushbutton to move the cursor over to the right side of the decimal and press the UP
pushbutton until the 3 is showing. Other settings require scrolling through a list of selections. For
example, you would move the cursor over to the CRV field and then scroll through a list of
available TCC curves.
4. Once all of the settings on the screen have been entered, press the Edit pushbutton a second
time and the settings will be validated. If the settings are in range, the Edit LED will go out. If you
want to abort the edit session without changing any settings, pres s the Res et pus hbut t on before
you press the Edit pushbutton the second time. The Edit LED will go out.
Performing Control Operations
Control operations can be executed by navigating to Metering, Control. These functions allow you to
control the state of virtual switches, override logic, control the active setting group, and control the state of
output contacts. All of these functions work similarly to the process of entering settings in that you press
the Edit pushbutton for the action to be executed.
BE1-11g Controls and Indicators
30 9424200994 Rev N
To operate the switch, use the following procedure:
1. Use the scrolling pushbuttons to scroll to Metering, Control, Virtual Switches, 43-1.
2. Press the Edit pushbutton to gain access. If password security has been initiated for control
functions, you will be prompted to enter the appropriate username and password. Once access is
gained to the control function, press the Edit pushbutton and the Edit LED will light.
3. Press the UP or DOWN scrolling key to select the new state for the switch. The “PUL” selection
will pulse the state of the switch from its present state to the opposite state for approximately 200
milliseconds. The “SET” selection will set the state of the switch to TRUE. The “RST” selection
will set the state of the switch to FALSE. The allowable states are dependent upon the logic mode
setting for the switch. If the switch is set to Switch mode, only the “SET” and “RST” will function. If
the switch is set to Pulse mode, only the “PUL” selection will function. If the switch is set to
Switch/Pulse mode, any of the selections will function.
4. Press the Edit pushbutton a second time and the switch will change to the selected position and
the Edit LED will go out. If you want to abort the editing session without changing any controls,
press the Reset pushbutton before you press the Edit pushbutton the second time. The Edit LED
will go out.
Resetting Functions
The Reset pushbutton is context sensitive. Its function is dependent upon the screen that is presently
being displayed. For example, pressing the Reset key when the Demand screen is displayed will reset the
demands but it will not reset the alarms, etc. It is necessary to scroll through the menu tree to the
appropriate alarm screen to reset an alarm. You are prompted for a username and password when using
the Reset key.
Display Setup
BESTCOMSPlus Navigation Path: Settings Explorer, General Settings, Front Panel HMI
HMI Navigation Path: Settings Explorer, Control, General Settings, Front Panel HMI
The contrast of the front-panel LCD (liquid crystal display) can be adjusted to suit the viewing angle used
or compensate for environmental conditions. When Invert Display is enabled, the display is inverted to
have black letters on a white background.
A power saving feature, referred to as Sleep mode, will dim the front-panel LCD backlight when a frontpanel key is not pressed for more than the user settable time delay. Normal display operation is resumed
when any front-panel button is pressed. Sleep mode is enabled and disabled in BESTCOMSPlus.
When Screen Scrolling is enabled, the front-panel summary screen will scroll through the list of Scrolling
Screen items. The Scroll Time Delay determines the scrolling speed. When this feature is enabled and no
screens are selected, the splash screen is displayed.
Targets and alarms are automatically displayed on the front-panel LCD when they become active if on the
splash screen. After targets and alarms are reset, the BE1-11g returns to the main screen and begins
scrolling if scrolling is enabled. Press the RIGHT navigation key to access the menu when targets and
alarms are being displayed.
The BESTCOMSPlus Front Panel HMI screen is illustrated in Figure 26. Settings are listed in Table 4.
Controls and Indicators BE1-11g
9424200994 Rev N 31
Locator
Setting
Range
Increment
Unit
Default
A
LCD Contrast Value
25 to 100
1
percent
50
B
Invert Display
Disabled or Enabled
n/a
n/a
Disabled
C
Sleep Mode
Disabled or Enabled
n/a
n/a
Enabled
D
Sleep Mode Time Delay
1 to 120
1
seconds
1
E
Language Selection
English or Russian
n/a
n/a
English
F
Enable Scroll
Disabled or Enabled
n/a
n/a
Enabled
G
Scroll Time Delay
1 to 600
1
seconds
3
H
Scrollable Metering Settings
All Metering Screens
n/a
n/a
None
Figure 26. Front-Panel Display Setup Screen
Table 4. Settings for Front-Panel Display
BE1-11g Controls and Indicators
32 9424200994 Rev N
Controls and Indicators BE1-11g
9424200994 Rev N 33
Note
Contact Sensing Turn-On Voltage *
Jumper Installed
(Low Position)
Jumper Not Installed
(High Position)
Gxx1xxxxxxxxxx
48 Vdc or 125 Vac/dc
26 to 38 Vdc
69 to 100 Vdc
56 to 97 Vac
Gxx2xxxxxxxxxx
125/250 Vac/dc
69 to 100 Vdc
56 to 97 Vac
138 to 200 Vdc
112 to 194 Vac
Gxx3xxxxxxxxxx
24 Vdc
n/a
Approx. 5 Vdc
Contact Inputs and Outputs
BE1-11g Generator Protection Systems provide up to seven contact inputs, up to eight general-purpose
contact outputs, and one dedicated, fail-s afe alar m contact output. Each input and output is isolated and
terminated at separate terminals. This section describes the function and setup of each input and output.
Contact-Sensing Inputs
A BE1-11g in a J type case has seven contact inputs to initiate BE1-11g actions. Four contact inputs are
provided in an H or P ty pe c as e. Each isolated input requires an external wetting voltage. The nominal
voltage(s) of the external dc source(s) must fall within the BE1-11g dc power supply input voltage range.
To enhance user flex ibil ity, the BE1-11g protection system uses wide-range ac/dc power supplies that
cover several common control voltage ratings. To enhance flexibility, the input circuits are designed to
respond to voltages at the lower end of the control voltage range while not overheating at the high end of
the control voltage range.
The contact input circuits are polarity sensitive. When an ac wetting voltage is applied, the input signal is
half-wave rectified by the opto-isolator diodes. The contact inputs drive BESTlogic™Plus variables IN1
through IN4 (H or P type case) or IN1 through IN7 (J type case). Each contact input is completely
programmable so meaningful lab els can be as signe d to each in put and the lo gic -high and logic-low
states. The BESTlogicPlus chapter provides more information about using contact inputs in your
programmable logic scheme.
Contact-Sensing Input Jumpers
The BE1-11g protection system is delivered with the jumpers in the
HIGH position. Read the following paragraphs before placing the BE111g in service.
Energizing levels for the contact-sensing inputs are jumper selectable for a minimum of approximately 5
Vdc for 24 Vdc nominal sensing voltages, 26 Vdc for 48 Vdc nominal sensing voltages, or 69 Vdc for 125
Vdc nominal sensing voltages. See Table 5 for the contact-sensing turn-on voltages.
Table 5. Contact-Sensing Turn-On Voltages
Style Option Nominal Input Voltage
* AC voltage ranges are calculated using the default recognition time (4 ms) and debounce time (16 ms).
Each BE1-11g is delivered with the co ntac t-sensing jumpers disconnected for operation in the higher end
of the control voltage range. If the contact-sensing inputs are to be operated at the lower end of the
control voltage range, the jumpers must be installed.
Contact-Sensing Jumper Configuration in a J Type Case
The following paragraphs describe how to locate and remove/change the contact-sens ing input jumper s :
BE1-11g Contact Inputs and Outputs
34 9424200994 Rev N
1. Remove the BE1-11g from ser v ice and de-en ergiz e it.
2. The contact-sensing input jumpers are located behind the rear terminal blocks that are used for
input connections. Using a 7/64” hex tool, remove the rear terminal block(s) associated with the
input(s) that you want to configure. Observe all electrostatic discharge (ESD) precautions when
handling the BE1-11g.
3. Using the input labels on the rear panel as a guide, locate the appropriate jumper terminal block
that is mounted on the circuit board. Each terminal block has two sets of pins. With the jumper as
installed at the factory, one pin should be visible when viewed from the back of the unit. This
configuration allows the inputs to operate at the higher end of the control voltage range. Figure 27
illustrates the location of the contact-sens i ng jumper s . The jumpers are shown in the HIGH
position.
4. To select operation at the lower end of the control voltage range, install the jumper across the two
pins using needle-nose pliers. Use care when removing and installing each jumper so that no
components are damaged.
5. When all jumpers are positioned for operation in the desired control voltage range, reinstall the
rear terminal block(s).
6. Using a 7/64” hex tool, tighten the screws to 10 in-lbs.
Figure 27. Contact-Sensing Jumper Locations (J Type Case)
Contact-Sensing Jumper Configuration in an H or P Type Case
The following paragraphs describe how to locate and remove/change the contact-sens ing input jumper s :
1. Remove the BE1-11g from ser v ice and de-en ergiz e it.
2. Remove the drawout assembly by loosening the two thumbscrews and pulling the assembly out
of the case. Observe all electrostatic discharge (ESD) precautions when handling the drawout
assembly.
Contact Inputs and Outputs BE1-11g
9424200994 Rev N 35
3. Locate the two jumper terminal block s that are moun ted on the Digital Circuit Board. The Digital
Circuit Board is the middle board in the assemb ly and the jumper ter min al bloc k s are located on
the component side of the circuit board. Each terminal block has two sets pins. With the jumper
as installed at the factory, one pin should be visible when viewed from the side of the unit. This
configuration allows the inputs to operate at the higher end of the control voltage range. Figure 28
illustrates the location of the contact-sensing jumpers. The jumpers are shown in the HIGH
position.
4. To select operation at the lower end of the control voltage range, install the jumper across the two
pins. Use care when removing and installing each jumper so that no components are damaged.
5. When all jumpers are positioned for operation in the desired control voltage range, prepare to
place the drawout assembly back into the case.
6. Align the drawout assembly with the case guides and slide the assembly into the case.
7. Tighten the screws.
Figure 28. Contact-Sensing Jumper Locations (H or P Type Case)
Digital Input Conditioning Function
Status of the contact-sensing inputs is checked every 1 millisecond. User-settable digital contact
recognition and debounce timers condition the signals applied to the inputs. These parameters can be
adjusted to obtain the optimum compromise between speed and security for a specific application. (See
Figure 29.)
If the sampled status of a monitored contact is detected as energized for the recognition time, the logic
variable changes from a de-energized (logic 0 or false) state to an energized (logic 1 or true) state. Once
contact closure is recognized, the logic variable remains in the energized state until the sampled status of
the monitored contact is detected to be de-energized for a period that is longer than the debounce time.
At this point, the logic variable will change from an energized (logic 1 or true) state to a de-energized
(logic 0 or false) state.
BE1-11g Contact Inputs and Outputs
36 9424200994 Rev N
Figure 29. Digital Input Conditioning Timing Diagram
Setting the Contact Inputs
BESTCOMSPlus Navigation Path: Settings Explorer, Programmable Inputs, Contact Inputs
HMI Navigation Path: Settings Explorer, Contact Inputs
Settings and labels for the contact inputs are set using BESTCOMSPlus®.
Each of the inputs has two settings and three labels. The settings are Recognition Time and Debounce
Time. The labels include a label to descr ibe the input, a labe l to descr ibe the En ergiz ed Sta te, and a labe l
to describe the De-Energized State. Labels are used by the BE1-11g's reporting functions.
To edit the settings or labels, use the Settings Explorer to open the Programmable Inputs, Contact Inputs
tree branch as shown in Figure 30.
Figure 30. Contact Inputs Screen
Contact Inputs and Outputs BE1-11g
9424200994 Rev N 37
Setting
Range
Increment
Unit
Default
Label
User programmable label for the input contact. Used by the reporting function to
characters long.
Recognition Time
4 to 255
1 *
milliseconds
4
Debounce Time
4 to 255
1 *
milliseconds
16
Energized State
User programmable label for the energized state of the contact. Used by the
This label can be up to 64 characters long.
De-Energized
User programmable label for the de-energized state of the contact. Used by the
This label can be up to 64 characters long.
See Table 6 for a list of settings and their defaults.
Table 6. Contact Input Settings
give meaningful identification to the input contact. This label can be up to 64
reporting function to give meaningful identification to the state of the input contact.
State
* Since the input conditioning function is evaluated every quarter cycle, the setting is internally rounded to
the nearest multiple of 4.16 milliseconds (60 Hz systems) or 5 milliseconds (50 Hz systems).
If you are concerned about ac voltage being coupled into the contact sensing circuits, the recognition time
can be set higher than one-half of the power system cycle period. This will take advantage of the halfwave rectification provided by the input circuitry.
If an ac wetting voltage is used, the recognition time can be set to less than one-half of the power system
cycle period and the debounce timer can be set to greater than one-half of the power system cycle period.
The extended debounce time will keep the input energized during the negative half-cycle. The default
settings of 4 and 16 milliseconds are compatible with ac wetting voltages.
Settings for contact inputs can also be entered through the front panel.
See the Terminals and Connectors chapter for an illustration of the programmable output terminals.
Contact output electrical ratings are listed in the Specifications chapter.
reporting function to give meaningful identification to the state of the input contact.
Retrieving Contact-Sensing Input Status
Contact input status is determined through BESTCOMSPlus by using the Metering Explorer to open the
Status, Inputs tree branch. BESTCOMSPlus must be online with the BE1-11g to view contact input status.
Alternately, status can be determined through the front-panel display by navigating to Metering > Status >
Inputs.
Contact Outputs
A BE1-11g in a J type case has eight contact outputs (OUT1 through OUT8) and one failsafe, normally
open or closed (when de-energized) alarm contact output (OUTA). Five contact outputs (OUT1 through
OUT5) are provided in an H or P type case.
Each output is isolated and rated for tripping duty. OUT1 through OUT8 are Form A (normally open), and
OUTA is Form B (normally closed) or Form A (normally open).The style number determines the type of
alarm contact output. A trip c oil monitoring circuit is hardwired across OUT1. See the Trip Circuit Monitor
(52TCM) chapter for det ails .
Contact outputs OUT1 through OUT8 and OUTA are driven by BESTlogicPlus expressions for OUT1
through OUT8 and OUTA. The use of each contact output is completely programmable so you can assign
meaningful labels to each output and to the logic 0 and logic 1 states of each output. The BESTlogicPlus
chapter has more information about programming output expressions in your programmable logic
schemes.
BE1-11g Contact Inputs and Outputs
38 9424200994 Rev N
Name
Description
NVMH Settings File Not Opened
Error opening settings file
Update NVM Blocks Failed
Error writing settings file
NVMH Saving Blocks Error
Error writing settings file
NVMH Flash File Error
Error writing settings file
Flash Error
Flash file system error
uP Reset
Repetitive reboot
Cal Error
Calibration error
Cal Defaults Loaded
BE1-11g not calibrated
Defaults Loaded
Defaults have been loaded
uP Overload
Microprocessor is busy
Power Supply
Input power is too low/failed
BESTlogicPlus expressions for OUT1 through OUT8 and OUTA drive contact outputs OUT1 through
OUT8 and OUTA. The state of the contact outputs can vary from the state of the output logic expressions
for three reasons:
1. The relay trouble alarm disables all hardware outputs.
2. The programmable hold timer is active.
3. The select-before-operate function overrides a virtual output.
Figure 31 shows a diagram of the contact output logic for the general-purpose contact outputs. The OUT1
relay closes when the 50-1 element is in a trip condition.
Figure 31. Output Logic, General Purpose Contact Outputs
Figure 32 illustrates the contact output logic for the failsafe alarm contact output when OUTA is normally
closed (style xxxxxxx2xxxxxx). The OUTA relay closes when the 50-1 element is in a trip condition.
Figure 32. Output Logic, Failsafe Alarm Contact Output
Relay Trouble Alarm Disable
All internal circuitry and software that affects how the BE1-11g functions is monitored by the continuous
self-test diagnostics function of the relay trouble alarms. A detailed list of relay trouble alarms is provided
in Table 7. If any one of these points asserts, the failsafe alarm output relay de-energizes and
closes/opens (depending on style number) the OUTA contact, the front-panel Relay Trouble LED lights,
all output relays are disabled, logic OUTA is set, and the BE1-11g is taken offline. The relay trouble
alarms function is not programmable.
Table 7. Relay Trouble Alarms
Contact Inputs and Outputs BE1-11g
9424200994 Rev N 39
Programmable Hold Timer—Hold Attribute
Historically, electromechanical relays have provided trip contact seal-in circuits. These seal-in circuits
consisted of a dc coil in series with the relay trip contact and a seal-in contact in parallel with the trip
contact. The seal-in feature serves several purposes for electromechanical relays. One purpose is to
provide mechanical energy to drop the target. A second purpose is to carry the dc tripping current from
the induction disk contact, which might not have significant closing torque for a low resistance connection.
A third purpose is to prevent the relay contact from dropping out until the current has been interrupted by
the 52a contacts in series with the trip coil. If the tripping contact opens before the dc current is
interrupted, the contact might be damaged. Of the three items, only item three is an issue for electronic
protection systems like the BE1-11g.
Contact Output Seal-In Logic
To prevent the output relay contacts from opening prematurely, a 200 millisecond hold timer can be
selected with BESTCOMSPlus. If the protection engineer desires seal-in logic with feedback from the
breaker position logic, he/she can provide this logic by modifying the logic for the tripping output. To do
this, use one of the general purpose timers (62) and set it for Pickup/Dropout mode. Set the timer logic so
that it is initiated by the breaker position input and set the timer for two cycles pickup and two cycles
dropout. The same can be done for the closing output. Figure 33 provides a seal-in logic diagram.
Figure 33. Contact Output Seal-In Logic Diagram
Setting the Contact Outputs
BESTCOMSPlus Navigation Path: Settings Explorer, Programmable Outputs, Contact Outputs
HMI Navigation Path: Not available through the fron t pane l
Settings and labels for the contact outputs are set using BESTCOMSPlus.
Each of the outputs has one setting and three labels. The sett ing consists of a Hold Attribute. The labels
include a label to describe the output, a label to describe the Ener g ized Stat e, and a label to describe the
De-Energized State. Labels are used by the BE1-11g's reporting functions.
To edit the settings or labels, use the Settings Explorer to open the Programmable Outputs, Contact
Outputs tree branch as shown in Figure 34.
BE1-11g Contact Inputs and Outputs
40 9424200994 Rev N
Figure 34. Contact Outputs Screen
Contact Output Logic Override Control
BESTCOMSPlus Navigation Path: Metering Explorer, Control, Output Override
HMI Navigation Path: Metering Explorer, Control, Output Override Contacts
Each contact output can be controlled directly using the select-before-operate output control function. The
output logic expression that normally controls the state of an output can be overridden and the contact
pulsed, held open, or held closed. This function is useful for testing purposes. An alarm point is available
in the programmable alarm function for monitoring when the output logic has been overridden. See the
Alarms chapter for more information about programmable alarms. Output logic override control is
achieved using the front-panel interface or BEST CO M SPlus. Use the Metering Explorer to open the
Control, Output Override screen. Refer to Figure 35.
Figure 35. Output Override Screen
Enabling Logic Override Contr ol
By default, logic override control is disabled. Output logic override must be enabled before the control can
be used. Enabling of the output logic override control is not possible at the front panel. It can only be
enabled through a communication port using BESTCOMSPlus (Figure 35). Click on the Disabled button
next to the output you want to control. This button will change to Enabled and the follow ing three ac tio n
choices will appear to the right: Reset, Set, and Pulse.
Pulsing a Contact Output
Pulsing BE1-11g outputs provides the user the ability to test the operability of an output without
energizing a measuring or timing element. This feature is useful when testing the protection and control
system. When pulsed, an output changes from the current state (as determined by the virtual output logic
expression) to the opposite state for 200 milliseconds. After 200 milliseconds, the output is returned
automatically to logic control.
Contact Inputs and Outputs BE1-11g
9424200994 Rev N 41
In the Action column, select Pulse from the drop-down menu and click on the green arrow to the right.
Pulse override control can also be accessed at the Metering > Control > Override Output Cont act s sc reen
of the front-panel display by selecting PUL in the Override State field for the output contact to be pulsed.
Changing the State of a Contact Output
Outputs can be forced to an energized (logic 1 or true) state or to a de-energized (logic 0 or false) state.
This feature can be used to disable a contact during testing.
In the Action column, select Set or Reset from the drop-down menu and click on the green arrow to the
right. Contact output override control can also be accessed at the Metering > Control > Override Output
Contacts screen of the front-panel display by entering a SET (logic 1 or true) or RST (logic 0 or false) in
the Override State field for the contact output to be controlled.
Returning a Contact Output to Logic Control
When the output logic has been overridden and the contact is held in an energized or de-energized state,
it is necessary to return the output to logic control.
Click on the Enabled button next to the output you want to change to logic control. This button changes to
Disabled and the action choices disappear. Logic control can also be achieved at the Metering > Control
> Override Output Contacts screen of the front-panel display by setting Override Enable to Disabled.
See the Terminals and Connectors chapter for an illustration of the programmable output terminals.
Contact output electrical ratings are listed in the Specifications chapter.
Retrieving Contact Output Status
Output status is determined through BESTCOMSPlus by using the Metering Explorer to open the
Status/Outputs tree branch. BESTCOMSPlus must be online with the BE1-11g to view contact output
status. Alternately, status can be determined through the front-panel display by navigating to Metering >
Status > Outputs.
BE1-11g Contact Inputs and Outputs
42 9424200994 Rev N
Contact Inputs and Outputs BE1-11g
9424200994 Rev N 43
Frequency Nominal
3V
V/Hz
Frequency Measured
V Measured
V/Hz
Nominal
Nominal
Phase-Phase
Measured
∗
==
Frequency Nominal
V
V/Hz
Frequency Measured
V Measured
V/Hz
Nominal
Nominal
-NeutralPhase
Measured
==
Overexcitation (24) Protecti on
The overexcitation (24) element monitors the volts per hertz ratio and protects transformers and
generators from the adverse effects of excessive heating resulting from overexcitation. Overexcitation
exists whenever the per unit volts per hertz exceeds the equipment design limitations.
Element logic connections are made on the BESTlogic™Plus sc reen in BESTCOMSPlus® a nd ele me nt
operational settings are configured on the Overexcitation (24) settings screen in BESTCOMSPlus. A
summary of the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Overexcitation (24)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Overexcitation 24
Element Operation
Overexcitation occurs when a generator or transformer magnetic core becomes saturated. When this
happens, stray flux is induced in non-laminated components, causing overheating. The BE1-11g detects
overexcitation conditions with a volts per hertz element that consists of one alarm setting, one inverse
time characteristic with selectable exponents (3 sets of time curves), and two definite-time characteristics.
This allows the user to select an individual inverse-time characteristic, a composite characteristic with
inverse time, and one or two definite-time elements, or a dual-level, definite-time element.
The inverse time characteristic closely approximates the heating characteristic of the protected equipment
as overexcitation increases. A linear reset characteristic provides for the decreasing (cooling) condition.
The overexcitation element responds to the magnitude of voltage versus frequency where the measured
voltage is phase to phase and includes the phase with the frequency measurement element.
Sensing Configuration
The pickup settings determine the V/Hz pickup level. The measured V/Hz is always calculated as the
measured voltage divided by the sensed system frequency. The measured phase depends on the
sensing voltage setting. The 24 element monitors VAB for both 3-wire and 4-wire connections. Thus, the
setting is in VPP/Hz for VT connection = 3W, 4W, AB, BC, CA and VP N/Hz for VT connect ion = AN, BN,
CN. For more information, refer to the Configuration chapter.
Nominal voltage for the BE1-11g is defined as a phase-to-neutral quantity. Nominal V/Hz depends on the
sensing voltage (VT) connection, nominal voltage, and nominal frequency settings. Nominal V/Hz is
calculated as the nominal voltage divided by nominal frequency. For VT connections equal to 3W, 4W,
AB, BC, CA, the nominal voltage (phase-neutral value) must be converted to a phase-phase value by
multiplying by the square root of 3. No additional conversion is required for VT connections equal to AN,
BN, or CN.
For 3W, 4W, AB, BC, or CA phase to phase sensing connections:
Equation 1. V/Hz Measured (3W, 4W, AB, BC, or CA)
For AN, BN, or CN phase to neutral sensing connections:
Equation 2. V/Hz Measured (AN, BN, or CN)
BE1-11g Overexcitation (24) Protection
44 9424200994 Rev N
n
Nominal
Measured
T
T
1
V/Hz
V/Hz
D
T
−
=
100*
FST
E
*DT
T
RR
=
Trip and Reset Equations
Equation 3 and Equation 4 represent the trip time and reset time for a constant V/Hz level. Normally, the
V/Hz pickup is set to a value greater than the V/Hz nominal. This ensures that V/Hz measured divided by
V/Hz nominal is always greater than 1.000 throughout the pickup range. If the pickup is set less than
nominal, then measured values above pickup and below nominal will result in the maximum time delay.
The maximum time delay is determined by Equation 3 with (V/Hz measured / V/Hz nominal) set equal to
1.001. The overall inverse time delay range is limited to 1,000 seconds maximum and 0.2 seconds
minimum.
Equation 3. Time to Trip
Equation 4. Time to Reset
where:
T
= Time to trip
T
T
= Time to reset
R
D
= Time dial trip
T
D
= Time dial, reset
R
E
= Elapsed time
T
n = Curve exponent (0.5, 1, 2)
FST = Full scale trip time (T
E
/FST = Fraction of total travel toward trip that integration had progressed to. (After a trip, this value
T
)
T
will be equal to one.)
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured V/Hz increases above the V/Hz threshold
established by the Pickup setting. In BESTlogicPlus, the Pickup output can be connected to other logic
elements to annunciate the condition, con tr ol other el e ments in logic , and start the fault recorder (logic
element FAULTTRIG).
Assertion of the Pickup output initiates an inverse or definite timer that begins timing to a trip. The
duration of the timer is established by the Time Dial (inverse time) or Time Delay (definite time) setting. A
Time Delay or Time Dial setting of zero (0) makes the 24 element instantaneous with no intentional time
delay.
If the monitored V/Hz is above both the calculated inverse time and definite time delay thresholds, the
definite time delay has priority over the inverse time characteristic.
If the pickup condition subsides before the element delay or calculated inverse time expires, the timer and
Pickup output are reset, no corrective action is taken, and the element is rearmed for any other
occurrences of overexcitation. If inverse reset is chosen, the inverse trip timer will ramp down towards
reset at a linear rate based on the Reset Dial setting. A Reset Dial setting of zero (0) makes the reset
instantaneous with no intentional delay. See the Time Curve Characteristics chapter for details on each of
the available time curves.
Trip
The Trip output becomes true if an overexcitation pickup condition exists for the duration of the element
Time Delay (definite time) or calculated inverse time. In BESTlogicPlus, the Trip output can be connected
to other logic elements and to a physical relay output to an nunc i ate the co nd ition and to initiate corrective
action. If a target is enabled for the element, the BE1-11g will record a target when the Trip output
becomes true. See the Fault Reporting chapter for more information about target reporting.
Overexcitation (24) Protection BE1-11g
9424200994 Rev N 45
Setting
Range
Increment
Unit of Measure
Default
Alarm Pickup
0 or 0.5 to 6
0.01
V/Hz
0
Alarm Time Delay
0 or 50 to 600,000
varies
milliseconds
0
Name
Function
Purpose
Block
Input
Disables the 24 function when true
Trip
Output
True when the 24 element is in trip condition
Pickup
Output
True when the 24 element is in pickup condition
Programmable Alarm
A 24 Volts per Hz alarm occurs during overexcitation so that corrective action can be taken before the 24
function trips. The alarm appears on the front-panel display, web page interface, and on the Alarms
metering screen in BESTCOMSPlus. Refer to the Alarms chapter for information about programming
alarms.
When the Alarm Pickup setting is exceeded, a timer is initiated and begins timing toward a trip. The
duration of the timer is established by the alarm Time Delay setting. An alarm Time Delay setting of zero
(0) makes the alarm instantaneous with no intentional time delay.
If the alarm pickup condition persists for the duration of the alarm Time Delay setting, the 24 Volts per Hz
alarm becomes true. If the alarm pickup condition subsides before the alarm time delay expires, the timer
is reset and no corrective action is taken.
Table 8 lists the programmable alarm settings.
Table 8. Programmable Alarm Settings
Element Blocking
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogicPlus. When the ele ment is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Overexcitation element logic connections are made on the BESTlogicPlus scr een in BESTCOMSPlus.
The overexcitation element logic block is illustrated in Figure 36. Logic inputs and outputs are
summarized in Table 9.
Figure 36. Overexcitation Element Logic Block
Table 9. Logic Inputs and Outputs
Operational Setti ngs
Overexcitation operational settings are configured on the Overexcitation (24) settings screen (Figure 37)
in BESTCOMSPlus. Setting ranges and defaults are summarized in Table 10.
BE1-11g Overexcitation (24) Protection
46 9424200994 Rev N
Setting
Range
Increment
Unit of Measure
Default
Mode
Disabled or Enabled
n/a
n/a
Disabled
Pickup (Inverse Time)
0 or 0.5 to 6
0.01
v/Hz
0
Time Dial (Inverse Time)
0 to 9.9
0.1
units
0
Reset Dial (Inverse Time)
0 to 9.9
0.1
units
0
Curve Exponent (Inverse Time)
0.5, 1, or 2
n/a
n/a
1
Pickup (Definite Time 1 & 2)
0 or 0.5 to 6
0.01
v/Hz
0
Time Delay (Definite Time 1 & 2)
50 to 600,000
varies
milliseconds
50
Note
Figure 37. Overexcitation Settings Screen
Table 10. Operational Settings
Settings Example
The overexcitation element is used to de-energize a generator or transformer that is experiencing an
overexcitation condition. Therefore, the manufacturer's overexcitation limit curves are required to
establish optimum protection. Figure 38 and F i gure 39 show examples of a transformer and generator
limit curve along with the optimum composite protection characteristic.
Overexcitation (24) Protection BE1-11g
Actual damage curves must be obtained from the equipment
manufacturer for the particular equipment to be protected.
9424200994 Rev N 47
Volt/Hz Characteristic
1.0
10.0
100.0
1000.0
100% 105% 110% 115% 120%
125% 130% 135% 140%
Percent of Nominal V/Hz
Time in Seconds
Transformer Limit
Generator Limit
Inverse
105%, TD=1.9
Definite
118%, 6s
Volt/Hz Characteristic
100%
105%
110%
115%
120%
125%
130%
135%
140%
1.0 10.0 100.0 1000.0
Time in Seconds
Percent of Nominal V/Hz
Transformer Limit
Generator Limit
Inverse
105%, TD=1.9
Definite
118%, 6s
D2871-43
02-12-04
Figure 38. Time Shown on Vertical Axis
BE1-11g Overexcitation (24) Protection
Figure 39. Time Shown on Horizontal Axis
48 9424200994 Rev N
seconds300100
50
30
0.5T100
FST
E
DT
R
T
RR
=∗∗=∗∗=
Assuming a Vnom of 69.3 Vpn, 1 pu volts/hertz = (69.3 * √3) / 60 = 2.00. Using IEEE Std C37.102-2006 -
IEEE Guide for AC Generator Protection as a guide for setting overexcitation protection, the following
example demonstrates how to set the BE1-11g to provide a composite V/Hz characteristic for protection
of a generator and a step-up transformer:
• Alarm = 105% @ 1 second time delay; V/Hz = 2 * 1.05 = 2.10
• Inverse time pickup = 105%; Time Dial = 1.9; Inverse Trip Curve = (M-1)^2; V/Hz = 2 * 1.05 = 2.10
• Definite Time #1 = 118% @ 6 seconds time delay; V/Hz = 1.18 * 2.0 = 2.36
The reset rate is determined by the Reset Dial setting. A setting of zero (0) gives an instantaneous reset.
Using the inverse squared characteristic, assume a trip time dial setting 2.0 and a pickup multiple of 1.2.
The total time to trip will be 50 seconds. If this exists for 30 seconds before being corrected (60% elapsed
time), what would the total reset time be for a reset dial setting of 5? Based on the reset equation
(Equation 5), the calculation will be:
Equation 5. Time to Reset
If the overexcitation condition returns prior to total reset (i.e., less than 300 seconds), timing resumes from
that point at the inverse square rate. For example, if this condition recurs after 150 seconds or 50% of the
total reset time, then trip time from the second event will start at 30% instead of 0%, therefore tripping in
70% of the original trip time or 35 seconds. Figure 40 illustrates the inverse time delay and reset time.
Figure 40. Inverse Time Delay and Reset Time
Overexcitation (24) Protection BE1-11g
9424200994 Rev N 49
Note
Sync-Check (25) Protection
The sync-check (25) element provides breaker closing supervision by comparing the voltage magnitude,
angle, and frequency of the phase voltage to the voltage magnitude, angle, and frequency of the auxiliary
voltage to determine synchronism. This element is not available in styles GxxxxxxxSxxxxx and
GxxxxxJxTxxxxx.
Element logic connect ions are made on the BE ST logic™Plus screen in BESTCOMSPlus® and eleme nt
operational setting are configured on the Sync-Check settings screen in BESTCOMSPlus. A summary of
the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Sync-Check (25)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Sync Check 25
Element Operation
When monitored voltage between the sources meets angle, voltage, and slip criteria, the element Sync
output becomes true. In BESTlogicPlus, the Sync output can be connected to other logic elements to
annunciate the condition or control other elements in logic. The Sync logic output becomes true when all
three of the following conditions are met:
1. Phase angle between sources is less than the Slip Angle setting.
2. Frequency error between sources is less than the Slip Frequency setting. (Note: When the
Source Freq > Destination Freq setting box is checked, only generator frequency greater than
bus frequency is allowed.)
3. Voltage magnitude between sources is less than setting. (Note: The voltage used by the BE1-11g
for this feature is a voltage magnitude measurement, not a voltage phasor measurement.)
Voltage thresholds are entered in percent allowing the use of non-equal transformers with the sync-check
function. The sync-check element Sync logic output is true when the criteria are met for the entered
nominal bus voltage, nominal line voltage, and allowable percent difference. For example, the sensing for
the generator is on one side of a step-down transformer and the sensing for the bus is on the other.
Dead/Live values are entered as percent as well.
The sync-check function will not work if VTX connections are set for
residual voltage input.
Measuring slip frequency directly allows the sync-check element to rapidly determine if systems are in
synchronism and requires no timer or inherent delay (as compared to systems that check only that the
phase angle is held within a window for some stretch of time). The moment that conditions 1, 2, and 3
(listed above) are met, the systems can be considered in synchronism, and the Sync logic output
becomes true. Refer to the Metering chapter for more information about slip frequency measurement.
VT Connections
The sync-check element compares the phase (generator) voltage to the auxiliary (bus) voltage. Proper
connection of the voltage transformer inputs is vital for correct operation of the sync-check element.
For clarification on single-phase VTP connections, refer to the Typical Connections chapter. The singlephase parallel connections ensure that the zero-crossing circuit is always connected to the sensed circuit.
For single-phase sensing connections derived from a phase-to-neutral source:
BE1-11g Sync-Check (25) Protection
50 9424200994 Rev N
Caution
Secondary
(Phase-Neutral)
3-wire
ABC
AB
69.3
120
0°
3-wire
ABC
BC
69.3
120
240°
3-wire
ABC
CA
69.3
120
120°
3-wire
ACB
AB
69.3
120
0°
3-wire
ACB
BC
69.3
120
120°
3-wire
ACB
CA
69.3
120
240°
4-wire
ABC
AN
69.3
69.3
0°
4-wire
ABC
BN
69.3
69.3
240°
4-wire
ABC
CN
69.3
69.3
120°
4-wire
ABC
AB
69.3
120
30°
4-wire
ABC
BC
69.3
120
270°
4-wire
ABC
CA
69.3
120
150°
4-wire
ACB
AN
69.3
69.3
0°
4-wire
ACB
BN
69.3
69.3
120°
4-wire
ACB
CN
69.3
69.3
240°
4-wire
ACB
AB
69.3
120
330°
4-wire
ACB
BC
69.3
120
90°
4-wire
ACB
CA
69.3
120
210°
Terminals Va (C13), Vb (C14), and Vc (C15) are connected in parallel. The single-phase signal is
connected between the parallel group and terminal N (C16).
For single-phase sensing connections derived from a phase-to-phase source:
Terminals Vb (C14), Vc (C15), and N (C16) are connected in parallel. The single-phase signal is
connected between terminal Va (C13) and the parallel group.
Note that the voltage monitor (described below) performs three of three testing for all connections. For
3W and 4W, phases A, B, and C are actually tested. For single-phase connections, the terminals are
connected in parallel as described above and the single-phase is tested three times.
The Aux VT Connection must be properly selected on the Sensing
Transformers screen in BESTCOMSPlus. Refer to the Configuration
chapter for more information on this setting.
Angle Compensation
Compensation for phase angle differences between the phase and auxiliary VT connections (including
single-phase VTP connections) are possible with the Angle Compensation setting. That is, for a VTP
selection of phase-to-phase and a VTX selection of phase-to-neutral, a value of 30° should be defined for
angle compensation.
Common system and sensing transformer combinations are shown in Table 11. This table assumes no
step-up or step-down transformer between the two measurement PTs. If the synchronizing zone includes
a step-up or step-down transformer, change the nominal voltages accordingly.
Table 11. Common System and Sensing Transformer Combinations
Phase VT
Connection
Phase
Rotation
Aux VT
Connection
Phase Voltage
Secondary
Aux Voltage
Angle
Compensation
Sync-Check (25) Protection BE1-11g
9424200994 Rev N 51
Secondary
(Phase-Neutral)
AB
ABC
AB
69.3
120
0°
AB
ACB
AB
69.3
120
0°
BC
ABC
BC
69.3
120
0°
BC
ACB
BC
69.3
120
0°
AB
ABC
BC
69.3
120
240°
AB
ACB
BC
69.3
120
120°
AB
ABC
AN
69.3
69.3
330°
AB
ACB
AN
69.3
69.3
30°
Phase VT
Connection
Phase
Rotation
Aux VT
Connection
Phase Voltage
Secondary
Aux Voltage
Angle
Compensation
Voltage Monitoring
The sync-check element Sync logic output provides closing supervision for only the live line/live bus
condition.
The Volt Monitor logic output is provided for conditions where the bus and/or the line are dead. In
BESTlogicPlus, the Volt Monitor logic output can be connected to other logic elements to annunciate the
condition or control other elements in logic. A live condition for either the phase voltage or auxiliary
voltage is determined when the measured voltage on the respective input is equal to or above the live
voltage threshold established by the Live Voltage setting. A dead condition for either phase voltage or
auxiliary voltage is determined when the measured voltage on the respective input is equal to or below
the dead voltage threshold established by the Dead Voltage setting. The Dropout Delay setting provides
hysteresis for the Volt Monitor logic output.
For the phase voltage input, if the connection is three phase, 3W or 4W, all three phases are tested and
must be above the live voltage threshold for a live condition to be true. Similarly, all three phases must be
below the dead voltage threshold for a dead condition to be true.
The Volt Monitor logic is illustrated in Figure 41. Any combination of logic settings can be selected for the
Voltage Monitor Logic on the Sync-Check (25) settings screen in BESTCOMSPlus. When a logic
combination is selected, the sync-check element closes the respective switch in Figure 41 associated with
each of the outputs.
Figure 41. Voltage Monitor Logic
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block the 25 element when fuse loss or loss
of potential is detected in a three-phase system.
BE1-11g Sync-Check (25) Protection
52 9424200994 Rev N
Logic
Function
Block
Input
Disables the 25 function when true
Sync
Output
True when the monitored voltage between the sources meets angle,
voltage, and slip criteria
Volt Monitor
Output
True when the bus and/or line is dead
Volt Synced
Output
True when the voltage magnitude between sources is less than setting
Angle
Synced
Output
True when the phase angle between sources is less than the Slip
Angle setting
Slip Synced
Output
True when the frequency error between sources is less than the Slip
Frequency setting
If the 60FL element trip logic is true and Block Phase/V1 is enabled, all functions that use the phase
voltage are blocked. See the Fuse Loss (60FL) chapter for more information on the 60FL functions.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the element outputs to logic 0. Connect the element Block input to the desired logic in
BESTlogicPlus. When the element is initially selected from the Elements view, the default condition of the
Block input is a logic 0.
Logic Connections
Sync-check element logic connections are made on the BESTlogicPlus scr een in BESTCOMSPlus. The
sync-check element logic block is illustrated in Figure 42. Logic inputs and outputs are summarized in
Table 12.
Figure 42. Sync-Check Element Logic Block
Table 12. Logic Inputs and Outputs
Name
Purpose
Operational Setti ngs
Sync-check element operational settings are configured on the Sync-Check (25) settings screen (Figure
43) in BESTCOMSPlus. Setting ranges and defaults are summarized in Table 13.
Sync-Check (25) Protection BE1-11g
9424200994 Rev N 53
Setting
Range
Increment
Unit of Measure
Default
Mode
Disabled or Enabled
n/a
n/a
Disabled
Voltage Difference
0 or 1 to 50
1
percent 0 Slip Angle
1 to 99
1
degrees
10
Slip Frequency
0.01 to 0.5
0.01
hertz
0.01
Source Freq > Destination Freq
Disabled or Enabled
n/a
n/a
Disabled
Angle Compensation
0 to 359.9
0.1
degrees
0
25 VM Live Voltage
0 or 10 to 90
1
percent
0
25 VM Dead Voltage
0 or 10 to 90
1
percent
0
25 VM Drop Out Delay
0 or 50 to 60,000
varies
milliseconds
50
0 = Disabled
123, 12, 13, 23
Figure 43. Sync-Check Settings Screen
Table 13. Operational Settings
25 Voltage Monitor Logic
n/a n/a 0
BE1-11g Sync-Check (25) Protection
54 9424200994 Rev N
Sync-Check (25) Protection BE1-11g
9424200994 Rev N 55
Phase Undervoltage (27P) Protection
Five phase undervoltage (27P) elements monitor the sensing voltage applied to the BE1-11g. An element
can be configured to protect against undervoltage when the phase voltage decreases below a defined
level.
The five, identical phase undervoltage pr otec t ion elements are designated 27P-1, 27P-2, 27P-3, 27P-4,
and 27P-5. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus® and
element operational settings are configured on the Undervoltage settings screen in BESTCOMSPlus. A
summary of the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Undervoltage (27P)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Undervoltage 27P
Element Operation
Phase undervoltage protection can be used to prevent large transformer and equipment damage when an
undervoltage condition exists. For example, an undervoltage condition could occur when a tap changing
control fails.
Modes of Protection
Three modes of protection are available. The One of Three mode activates protection when one of the
three phases of voltage decreases below the Pickup setting. The Two of Three mode activates protection
when any two of the three phases of voltage decrease below the Pickup setting. The Three of Three
mode activates protection when all three phases of voltage decrease below the Pickup setting.
Voltage Response
The phase undervoltage element can be set to monitor VPP or VPN. This is determined by the 27/59
Mode parameter of the phase VT connections found on the System Parameters/Sensing Transformers
settings screen in BESTCOMSPlus. For more information on the VTP setup for PP or PN voltage
response, see the Configuration chapter.
Timings
The timing mode can be set for definite or inverse. For details on the inverse time curve, refer to the Time
Curve Characteristics chapter.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured voltage decreases below the voltage threshold
established by the Pickup setting. In BESTlogicPlus, the Pickup output can be connected to other logic
elements to annunciate the condition, control other elements in logic, and start the fault recorder (logic
element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay (definite timing) or Time Dial (inverse timing). A Time Delay or Time Dial
setting of zero (0) makes the 27P element instantaneous with no intentional time delay.
If the pickup condition subsides before the element delay or calculated inverse time expires, the timer and
Pickup output are reset, no corrective action is taken, and the element is rearmed for any other
occurrences of undervoltage.
BE1-11g Phase Undervoltage (27P) Protection
56 9424200994 Rev N
Name
Logic Function
Purpose
Block
Input
Disables the 27P func ti on when true
Trip
Output
True when the 27P element is in a trip condition
Pickup
Output
True when the 27P element is in a pickup condition
Trip
The Trip output becomes true when an undervoltage pickup condition persists for the duration of the
element Time Delay setting or calculated inverse time. In BESTlogicPlus, the Trip output can be
connected to other logic elements and to a physical relay output to annunciate the condition and to initiate
corrective action. If a target is enabled for the element, the BE1-11g will record a target when the Trip
output becomes true. See the Fault Reporting chapter for more information about target reporting.
Voltage Inhibit
The Voltage Inhibit setting impedes phase undervoltage element operation during undervoltage
conditions that may occur during equipment startup. This setting is expressed in primary or secondary
voltage depending on the Settings Display Mode selected on the General Settings/Display Units settings
screen in BESTCOMSPlus. Its unit of measure depends upon the phase VT connection setting. For fourwire or phase-to-neutral sensing connections, the inhibit level is expressed in Vpn. For three-wire or
phase-to-phase sensing connections the inhibit level is expressed in Vpp.
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block 27P protection when fuse loss or loss
of potential is detected in a three-phase system.
If the 60FL element trip logic is true and Block Phase/V1 is enabled, all functions that use the phase
voltage are blocked. See the Fuse Loss (60FL) chapter for more information on the 60FL function.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogicPlus. When the ele me nt is i nit ially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Phase undervoltage element logic connections are made on the BESTlogicPlus screen in
BESTCOMSPlus. The phase undervoltage element logic block is illustrated in Figure 44. Logic inputs and
outputs are summarized in Table 14.
Figure 44. Phase Undervoltage Element Logic Block
Table 14. Logic Inputs and Outputs
Phase Undervoltage (27P) Protec t ion BE1-11g
9424200994 Rev N 57
Setting
Range
Increment
Unit of Measure
Default
Disabled,
or Three of Three
Pickup
0 or 1 to 300
0.1
volts
0
Inhibit Level
0 or 1 to 300
0.1
volts
0
Timing Mode
Definite or Inverse
n/a
n/a
Definite
Time Delay (Definite Timing)
50 to 600,000
varies
milliseconds
50
Time Dial (Inverse Timing)
0 to 9.9
0.1
units
0
Operational Setti ngs
Phase undervoltage element operational settings are configured on the Undervoltage (27P) settings
screen (Figure 45) in BESTCOMSPlus. Setting ranges and defaults are sum marized in Table 15.
Figure 45. Phase Undervoltage Settings Screen
Mode
Table 15. Operational Settings
One of Three,
Two of Three,
n/a n/a Disabled
BE1-11g Phase Undervoltage (27P) Protection
58 9424200994 Rev N
Phase Undervoltage (27P) Protec t ion BE1-11g
9424200994 Rev N 59
Auxiliary Undervoltage (27X) Protection
Four auxiliary undervoltage (27X) elements monitor the phase and auxiliary voltage applied to the BE111g. An element can be configured to protect against undervoltage by monitoring neutral-shift voltage,
positive-sequence voltage, negative-sequence voltage, fundamental voltage on the Vx input, or thirdharmonic voltage on the Vx input.
The four, identical auxiliary undervoltage protection elements are designated 27X-1, 27X-2, 27X-3, and
27X-4. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus® and
element operational settings are configured on the Undervoltage (27X) settings screen in
BESTCOMSPlus. A summary of the logic inputs and outputs and operational settings appears at the end
of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Undervoltage (27X)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Undervoltage 27X
Element Operation
Auxiliary undervoltage protection can be used to protect equipment from damage caused by phase
failure, positive/negative phase sequence, or phase unbalance.
Modes of Protection
Five modes of protection are available: 3V0, V1, V2, Vx Fundamental, and Vx Third Harmonic.
3V0 Mode
3V0 mode provides voltage unbalance protection in a three-phase system. The 3V0 measurement
increases as the three-phase voltages become unbalanced.
V1 Mode
V1 mode provides positive phase-sequence protection in a three-phase system. The V1 measurement
increases as the phase sequence is brought forward.
V2 Mode
V2 mode provides negative phase-sequence protection in a three-phase system. The V2 measurement
increases as voltage becomes unbalanced or the phase sequence is reversed.
Vx Fundamental Mode
Vx Fundamental mode provides ground offset detection on high impedance ground systems or phase
undervoltage protection in s ync -check applications.
Vx Third Harmonic Mode
Vx Third Harmonic mode provides internal generator short detection.
Connections
Connections are made on the rear of the BE1-11g. The phase VT inputs (Va, Vb, Vc) are used when 3V0,
V1, or V2 mode is selected. The auxiliary VT input (Vx) is used when Vx Fundamental or Vx Third
Harmonic mode is selected. For an illustration of terminals, refer to the Terminals and Connectors
chapter.
Sensing Configuration
When using the Vx input, setting the Aux VT Connection parameter provides the correct labeling of
settings and metering data found in BESTCOMSPlus and fault reports. The Aux VT Connection
BE1-11g Auxiliary Undervoltage (27X) Protection
60 9424200994 Rev N
Aux VT Connection
Mode
Unit
AB, BC, CA
Vx Fundamental, Vx Third Harmonic
VPP
AN, BN, CN
Vx Fundamental, Vx Third Harmonic
VPN
Ground
Vx Fundamental, Vx Third Harmonic
VPN
Any
V1, V2, and 3V0
VPN
parameter set to AB, for example, will display the metering data as AB in fault records and display the
pickup setting as Vpp in BESTCOMSPlus. See Table 16 for a full list of possible settings. The Aux VT
Connection parameter is found on the System Parameters/Sensing Transformers settings screen in
BESTCOMSPlus. For more information on the auxiliary VT setup, see the Configuration chapter.
Table 16. Auxiliary VT Configuration
Timings
The timing mode can be set for definite or inverse. For details on the inverse time curve, refer to the Time
Curve Characteristics chapter.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured voltage decreases below the voltage threshold
established by the Pickup setting. In BESTlogicPlus, the Pickup output can be connected to other logic
elements to annunciate the condition, control other elements in logic, and start the fault recorder (logic
element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay (definite timing) or Time Dial (inverse timing). A Time Delay or Time Dial
setting of zero (0) makes the 27X element instantaneous with no intentional time delay.
If the pickup condition subsides before the element delay or calculated inverse time expires, the timer and
Pickup output are reset, no corrective action is taken, and the element is rearmed for any other
occurrences of undervoltage.
Trip
The Trip output becomes true if an undervoltage pickup condition persists for the duration of the element
Time Delay setting or calculated inverse time. In BESTlogicPlus, the Trip output can be connected to
other logic elements and to a physical relay output to annunciate the condition and to initiate corrective
action. If a target is enabled for the element, the BE1-11g will record a target when the Trip output
becomes true. See the Fault Reporting chapter for more information about target reporting.
Voltage Inhibit
The Voltage Inhibit setting impedes auxiliary undervoltage element operation during undervoltage
conditions that may occur during equipment startup. This setting is expressed in primary or secondary
voltage depending on the Settings Display Mode selected on the General Settings/Display Units settings
screen in BESTCOMSPlus.
Its unit of measure depends upon the auxiliary VT connection setting and 27X element mode selected.
For AB, BC, and CA sensing connections in Vx Fundamental or Vx Third Harmonic mode, the inhibit level
is expressed in Vpp. For AN, BN, CN, or Ground sensing connections in Vx Fundamental or Vx Third
Harmonic mode, the inhibit level is expressed in Vpn. The inhibit level is always expressed in Vpn for V1,
V2, and 3V0 modes of the 27X element.
Auxiliary Undervoltage (27X) Protection BE1-11g
9424200994 Rev N 61
Name
Logic Function
Purpose
Block
Input
Disables the 27X function when true
Trip
Output
True when the 27X element is in a trip condition
Pickup
Output
True when the 27X element is in a pickup condition
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block 27X protection when fuse loss or loss
of potential is detected in a three-phase system.
If the 60FL element trip logic is true and Block Phase/V1 is enabled, the 27X function will be blocked
when configured for V1 mode. If Block V2 is enabled, the 27X function will be blocked when configured
for V2 mode. If Block 3V0 is enabled, the 27X function will be blocked when configured for 3V0 mode.
See the Fuse Loss (60FL) chapter for more information on the 60FL function.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogicPlus. When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Auxiliary undervoltage element logic connections are made on the BESTlogicPlus screen in
BESTCOMSPlus. The auxiliary undervoltage element logic block is illustrated in Figure 46. Logic inputs
and outputs are summarized in Table 17.
Figure 46. Auxiliary Undervoltage Element Logic Block
Table 17. Logic Inputs and Outputs
Operational Setti ngs
Auxiliary undervoltage element operational settings are configured on the Undervoltage (27X) settings
screen (Figure 47) in BESTCOMSPlus. Setting ranges and defaults are summarized in Table 18.
BE1-11g Auxiliary Undervoltage (27X) Protection
62 9424200994 Rev N
Setting
Range
Increment
Unit of Measure
Default
Disabled,
Vx Third Harmonic
Pickup
0 or 1 to 150
0.1
volts
0
Inhibit Level
0 or 1 to 150
0.1
volts
0
Timing Mode
Definite or Inverse
n/a
n/a
Definite
Time Delay (Definite Timing)
50 to 600,000
varies
milliseconds
50
Time Dial (Inverse Timing)
0 to 9.9
0.1
units
0
Figure 47. Auxiliary Undervoltage Settings Screen
Table 18. Operational Settings
Mode*
3V0, V1, V2,
Vx Fundamental,
n/a n/a Disabled
* To use 3V0, V1, or V2, the VTP connection cannot be single-phase.
Auxiliary Undervoltage (27X) Protection BE1-11g
9424200994 Rev N 63
Negative-Sequence Voltage (47) Protection
Negative-sequence voltage protection is included as a mode of the 27X (Auxiliary Undervoltage) and 59X
(Auxiliary Overvoltage) elements. Refer to the Auxiliary Undervoltage (27X) Protection and Auxiliary
Overvoltage (59X) Protection chapters for information on how to set up and program the V2 (negative-
sequence voltage) mode of the 27X and 59X elements.
Negative-sequence voltage protection is used to sense power-system imbalance. This situation occurs
when a large single-phase load is switched onto the system, or when transformer-input fus es blow in only
one or two phases. Negative-sequence voltage protection is good for detecting improper phasing when
an oncoming generator is paralleled to the power system. All motor loads should be protected from the
heating caused by unbalanced voltage (either on the bus or on each motor feeder). Industry standards
state that the existence of unbalanced voltage feed results in 4 to 10 times the current imbalance. For a
motor feeder, the negative-sequence voltage unbalances should not exceed 5 percent to avoid
overheating and damage.
BE1-11g Negative-Sequence Voltage (47) Protection
64 9424200994 Rev N
Negative-Sequence Voltage (47) Protection BE1-11g
9424200994 Rev N 65
Phase Overvoltage (59P) Protection
Four phase overvoltage (59P) elements monitor the sensing voltage applied to the BE1-11g. An element
can be configured to protect against overvoltage when the phase voltage increases above a defined level.
The four, identical overvoltage protection elements are designated 59P-1, 59P-2, 59P-3, and 59P-4.
Element logic connections are made on the BESTlogic™Plus sc reen in BESTCOMSPlus® a nd ele me nt
operational settings are configured on the Overvoltage settings screen in BESTCOMSPlus. A summary of
the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Overvoltage (59P)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Overvoltage 59P
Element Operation
Overvoltage protection can be used to prevent large transformer and equipment damage when an
overvoltage condition exists. For example, an overvoltage condition could occur when the tap changing
control fails.
Modes of Protection
Three modes of protection are available. The One of Three mode activates protection when one of the
three phases of volt age inc r eas es above the Pickup setting. The Two of Three mode activates protection
when any two of the three phases of voltage increases above the Pickup setting. The Three of Three
mode activates protection when all three phases of voltage increase above the Pickup setting.
Voltage Response
The overvoltage element can be set to monitor VPP or VPN. This is determined by the 27/59 Mode
parameter of the phase VT connections found on the System Parameters/Sensing Transformers settings
screen in BESTCOMSPlus. For more information on the VTP setup for PP or PN voltage response, see
the Configuration chapter.
Timings
The timing mode can be set for definite or inverse. For details on the inverse time curve, refer to the Time
Curve Characteristics chapter.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured voltage increases above the voltage threshold
established by the Pickup setting. In BESTlogicPlus, the Pickup output can be c on nec ted to other log ic
elements to annunciate the condition, con tr ol other el e ments in logic , and start the fault recorder (logic
element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay (definite timing) or Time Dial (inverse timing). A Time Delay or Time Dial
setting of zero (0) makes the 59P element instantaneous with no intentional time delay.
If the pickup condition subsides before the element delay or calculated inverse time expires, the timer and
Pickup output are reset, no corrective action is taken, and the element is rearmed for any other
occurrences of overvoltage.
BE1-11g Phase Overvoltage (59P) Protection
66 9424200994 Rev N
Name
Logic Function
Purpose
Block
Input
Disables the 59P function when true
Trip
Output
True when the 59P element is in a trip condition
Pickup
Output
True when the 59P element is in a pickup condition
Trip
The Trip output becomes true if an overvoltage pickup condition persists for the duration of the element
Time Delay setting or calculated inverse time. In BESTlogicPlus, the Trip output can be connected to
other logic elements and to a physical relay output to annunciate the condition and to initiate corrective
action. If a target is enabled for the element, the BE1-11g will record a target when the Trip output
becomes true. See the Fault Reporting chapter for more information about target reporting.
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block 59P protection when fuse loss or loss
of potential is detected in a three-phase system.
If the 60FL element trip logic is true and Block Phase/V1 is enabled, all functions that use the phase
voltage are blocked. See the Fuse Loss (60FL) chapter for more information on the 60FL function.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogicPlus. When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Overvoltage element logic connections are made on the BESTlogicPlus screen i n BESTCOMSPlus. The
overvoltage element logic block is illustrated in Figure 48. Logic inputs and outputs are summarized in
Table 19.
Figure 48. Overvoltage Element Logic Block
Table 19. Logic Inputs and Outputs
Operational Setti ngs
Overvoltage element operational settings are configured on the Overvoltage settings screen (Figure 49) in
BESTCOMSPlus. Setting ranges and defaults are summarized in Table 20.
Phase Overvoltage (59P) Protection BE1-11g
9424200994 Rev N 67
Setting
Range
Increment
Unit of Measure
Default
Disabled,
or Three of Three
Pickup
0 or 1 to 300
0.1
volts 0 Timing Mode
Definite or Inverse
n/a
n/a
Definite
Time Delay (Definite Timing)
50 to 600,000
varies
milliseconds
50
Time Dial (Inverse Timing)
0 to 9.9
0.1
units
0
Figure 49. Overvoltage Settings Screen
Mode
Table 20. Operational Settings
One of Three,
Two of Three,
n/a n/a Disabled
BE1-11g Phase Overvoltage (59P) Protection
68 9424200994 Rev N
Phase Overvoltage (59P) Protection BE1-11g
9424200994 Rev N 69
Auxiliary Overvoltage (59X) Protect i on
Four auxiliary overvoltage (59X) elements monitor the phase and auxiliary voltage applied to the
BE1-11g. An element can be configured to protect against overvoltage by monitoring neutral-shift voltage,
positive-sequence voltage, negative-sequence voltage, fundamental voltage on the Vx input, or thirdharmonic voltage on the Vx input.
The four, identical auxiliary overvoltage protection elements are designated 59X-1, 59X-2, 59X-3, and
59X-4. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus® and
element operational settings are configured on the Overvoltage (59X) settings screen in BESTCOMSPlus.
A summary of the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Overvoltage (59X)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Overvoltage 59X
Element Operation
Auxiliary overvoltage protection can be used to protect equipment from damage caused by phase failure,
positive/negative phase sequence, or phase unbalance.
Modes of Protection
Five modes of protection are available: 3V0, V1, V2, Vx Fundamental, and Vx Third Harmonic.
3V0 Mode
3V0 mode provides voltage unbalance protection in a three-phase system. The 3V0 measurement
increases as the three-phase voltages become unbalanced.
V1 Mode
V1 mode provides positive phase-sequ ence pr otec t ion in a three-phase system. The V1 measurement
increases as the phase sequence is brought forward.
V2 Mode
V2 mode provides negative phase-sequence pr otection in a three-phase system. The V2 measurement
increases as voltage becomes unbalanced or the phase sequence is reversed.
Vx Fundamental Mode
Vx Fundamental mode provides ground offset detection on high impedance ground systems or phase
overvoltage protection in sync-check applications.
Vx Third Harmonic Mode
Vx Third Harmonic mode detects an increase in third harmonic.
Connections
Connections are made on the rear of the BE1-11g. The phase VT inputs (Va, Vb, Vc) are used when 3V0,
V1, or V2 mode is selected. The auxiliary VT input (Vx) is used when Vx Fundamental or Vx Third
Harmonic mode is selected. For an illustration of terminals, refer to the Terminals and Connectors
chapter.
Sensing Configuration
When using the Vx input, setting the Aux VT Connection parameter provides the correct labeling of
settings and metering data found in BESTCOMSPlus and fault reports. The Aux VT Connection
parameter set to AB, for example, will display the metering data as AB in fault records and display the
BE1-11g Auxiliary Overvoltage (59X) Protection
70 9424200994 Rev N
Aux VT Connection
Mode
Unit
AB, BC, CA
Vx Fundamental, Vx Third Harmonic
VPP
AN, BN, CN
Vx Fundamental, Vx Third Harmonic
VPN
Ground
Vx Fundamental, Vx Third Harmonic
VPN
Any
V1, V2, and 3V0
VPN
pickup setting as Vpp in BESTCOMSPlus. See Table 21 for a full list of possible settings. The Aux VT
Connection parameter is found on the System Parameters/Sensing Transformers settings screen in
BESTCOMSPlus. For more information on the auxiliary VT setup, see the Configuration chapter.
Table 21. Auxiliary VT Configuration
Timings
The timing mode can be set for definite or inverse. For details on the inverse time curve, refer to the Time
Curve Characteristics chapter.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured voltage increases above the voltage threshold
established by the Pickup setting. In BESTlogicPlus, the Pickup output can be connected to other logic
elements to annunciate the condition, con tr ol other el e ments in logic , and start the fault recorder (logic
element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay (definite timing) or Time Dial (inverse timing). A Time Delay or Time Dial
setting of zero (0) makes the 59X element instantaneous with no intentional time delay.
If the pickup condition subsides before the element delay or calculated inverse time expires, the timer and
Pickup output are reset, no corrective action is taken, and the element is rearmed for any other
occurrences of overvoltage.
Trip
The Trip output becomes true if an overvolt age pick up c ondit ion pers ists for the du ration of the eleme nt
Time Delay setting or calculated inverse time. In BESTlogicPlus, the Trip output can be connected to
other logic elements and to a physical relay output to annunciate the condition and to initiate corrective
action. If a target is enabled for the element, the BE1-11g will record a target when the Trip output
becomes true. See the Fault Reporting chapter for more information about target reporting.
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block 59X protection when fuse loss or loss
of potential is detected in a three-phase system.
If the 60FL element trip logic is true and Block Phase/V1 is enabled, the 59X function will be blocked
when configured for V1 mode. If Block V2 is enabled, the 59X function will be blocked when configured
for V2 mode. If Block 3V0 is enabled, the 59X function will be blocked when configured for 3V0 mode.
See the Fuse Loss (60FL) chapter for more information on the 60FL function.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
Auxiliary Overvoltage (59X) Protection BE1-11g
9424200994 Rev N 71
Name
Logic Function
Purpose
Block
Input
Disables the 59X function when true
Trip
Output
True when the 59X element is in a trip condition
Pickup
Output
True when the 59X element is in a pickup condition
element Block input to the desired logic in BEST logicPlus. When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Auxiliary overvoltage element logic connections are made on the BESTlogicPlus screen in
BESTCOMSPlus. The auxiliary overvoltage element logic block is illustrated in Figure 50. Logic inputs
and outputs are summarized in Table 22.
Figure 50. Auxiliary Overvoltage Element Logic Block
Table 22. Logic Inputs and Outputs
Operational Setti ngs
Auxiliary overvoltage element operational settings are configured on the Overvoltage (59X) settings
screen (Figure 51) in BESTCOMSPlus. Setting ranges and defaults are sum marized in Table 23.
Figure 51. Auxiliary Overvoltage Settings Screen
BE1-11g Auxiliary Overvoltage (59X) Protection
72 9424200994 Rev N
Setting
Range
Increment
Unit of Measure
Default
Disabled,
Vx Third Harmonic
Pickup
0 or 1 to 150
0.1
volts 0 Timing Mode
Definite or Inverse
n/a
n/a
Definite
Time Delay (Definite Timing)
50 to 600,000
varies
milliseconds
50
Time Dial (Inverse Timing)
0 to 9.9
0.1
units
0
Table 23. Operational Settings
Mode*
3V0, V1, V2,
Vx Fundamental,
n/a n/a Disabled
* To use 3V0, V1, or V2, the VTP connection cannot be single-phase.
Auxiliary Overvoltage (59X) Protection BE1-11g
9424200994 Rev N 73
Stator Ground (64G) Protection
The BE1-11g provides ground protection for 100% of the stator winding on high-impedance, grounded
generators. This protection is implemented by using the 27X element in Vx Third Harmonic mode and the
59X element in Vx Fundamental mode. The 59X element detects winding ground faults in approximately
85% of the winding. Faults closer to the generator neutral do not result in high neutral voltage but are
detected by the 27X element using third harmonic voltages. The combination of these two measuring
methods provides ground fault protection for the full winding.
Refer to the Auxiliary Undervoltage (27X) Protection and Auxiliary Overvoltage (59X) Protection chapters
for information on how to configure the Vx Third Harmonic undervoltage and Vx Fundamental overvoltage
modes of the 27X and 59X elements.
BE1-11g Stator Ground (64G) Protection
74 9424200994 Rev N
Stator Ground (64G) Protection BE1-11g
9424200994 Rev N 75
Vector Jump (78V) Protection
The vector jump (78V) element protects the generator by disconnecting it from the grid when a loss of
mains or mains failure occurs. This prevents the generator from remaining tied to the mains if the mains
returns due to an external reclose device.
Element logic connections are made on the BESTlogic™Plus sc reen in BESTCOMSPlus® a nd ele me nt
operational settings are configured on the Vector Jump (78V) settings screen in BESTCOMSPlus. A
summary of the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Voltage, Vector Jump (78V)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Voltage
Protection, Vector Jump 78V
Element Operation
When a loss of mains occurs, it is likely that the generator load will shift abruptly since the generator is
driving everything between the generator output and the utility breaker that removed mains power. Such a
load shift is likely to cause a speed shift, which may result in the generator being out of phase with the
mains when a reclose occurs. If the generator is out of phase and connection with the mains is
established, damage could occur.
The vector jump element trips the breaker when it detects a phase shift in the generator voltage at V
, or Vx, depending on connections. A sudden change in generator phase angle often occurs when the
V
AB
grid is lost. This change of phase angle results in an earlier zero crossing of the generator voltage if the
generator load decreases. It results in a later zero crossing if the generator load increases. This shift of
the zero crossing (vector jump) is expressed in degrees.
,
AN
VT Source
The Source setting configures the vector jump element to monitor the Phase VT or Auxiliary VT. For an
illustration of BE1-11g terminals, refer to the Terminals and Connectors chapter.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the vector shift increases above the threshold established by the
Pickup setting. In BESTlogicPlus, the Pickup output can be connected to other logic elements to
annunciate the condition, control other elements in logic, and start the fault recorder (logic element
FAULTTRIG).
Trip
The Trip output operates simultaneously with the Pickup output. In BESTlogicPlus, the Trip output can be
connected to other logic elements and to a physical relay output to annunciate the condition and to initiate
corrective action. If a target is enabled for the element, the BE1-11g will record a target when the Trip
output becomes true. See the Fault Reporting chapter for more information about target reporting.
The Trip output is held closed for the duration established by the Trip Hold Time setting.
Element Blocking
Fuse Loss
The fuse loss (60FL) element of the BE1-11g can be used to block 78V protection when fuse loss or loss
of potential is detect ed in a three-phase system.
BE1-11g Vector Jump (78V) Protection
76 9424200994 Rev N
Name
Logic Function
Purpose
Block
Input
Disables the 78V function when true
Trip
Output
True when the 78V element is in trip condition
Pickup
Output
True when the 78V element is in pickup condition
If the 60FL element trip logic is true and Block Phase/V1 is enabled, all functions that use the phase
voltage are blocked. See the Fuse Loss (60FL) chapter for more information on the 60FL function.
Protective elements blocked by 60FL should be set so that trip times are 60 milliseconds or greater to
assure proper coordination of blocking.
Block Logic Input
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element trip-hold time. Connect
the element Block input to the desired logic in BESTlogicPlus. When the element is initially selected from
the Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Vector jump element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus. The
vector jump element logic block is illustrated in Figure 52. Logic inputs and outputs are summarized in
Table 24.
Figure 52. Vector Jump Element Logic Block
Table 24. Logic Inputs and Outputs
Operational Setti ngs
Vector jump element operational settings are configured on the Vector Jump (78) settings screen
(Figure 53) in BESTCOMSPlus. Setting ranges and defaults are summarized in Table 25.
Figure 53. Vector Jump Settings Screen
Vector Jump (78V) Protection BE1-11g
9424200994 Rev N 77
Setting
Range
Increment
Unit of Measure
Default
Mode
Disabled or Enabled
n/a
n/a
Disabled
Source
Phase VT or Aux VT
n/a
n/a
Phase VT
Pickup
0 or 2 to 90
1
degrees
0
Trip Hold Time
0 to 60,000
varies
milliseconds
200
Table 25. Operational Settings
BE1-11g Vector Jump (78V) Protection
78 9424200994 Rev N
Vector Jump (78V) Protection BE1-11g
9424200994 Rev N 79
Note
Frequency (81) Protection
Eight frequency (81) elements monitor the frequency of the sensing voltage applied to the BE1-11g. An
element can be configured to protect against underfrequency, overfrequency, or the rate of frequency
change.
The eight, identical frequency protection elements are designated 81-1, 81-2, 81-3, 81-4, 81-5, 81-6, 817, and 81-8. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus®
and element operational settings are configured on the Frequency settings screen in BESTCOMSPlus. A
summary of the logic inputs and outputs and operational settings appears at the end of this chapter.
BE1-11g protection systems enabled for IEC-61850 communication
(style Gxxxx5xxxxxxxx) have their frequency protection elements fixed
at four underfrequency elements, two overfrequency elements, and
two frequency rate-of-change elements.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Frequency, Frequency (81)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Frequency
Protection 81
Frequency Measurement
For four-wire or single-phase sensing connections, the power system frequency is measured through the
BE1-11g A-phase sensing voltage input. For a three-wire connection, the power system frequency is
measured through the A- and B-phase sensing voltage connections. Power system frequency is also
measured through the BE1-11g auxiliary voltage (Vx) sensing input. Refer to the Typical Connections
chapter for information on voltage connections.
To measure frequency, the voltage sensed by the BE1-11g must be greater than 10 Vac. The measured
frequency is the average of two cycles of voltage measurement.
Underfrequency and Overfrequency Protection
Underfrequency and overfrequency protection can be useful for detecting load shedding or islanding. For
example, when a source of distributed generation (DG) is suddenly separated or isolated from the electric
utility, the frequency will change quickly from the nominal value (except for the improbable case of a
perfect load-to-generation match). This makes frequency measurement an excellent method for detecting
an island condition.
Any of the eight 81 elements can be configured for underfrequency or overfrequency protection.
Mode
Underfrequency or overfrequency protection is selected through the Mode setting. A setting of Under
selects underfrequency protection and a setting of Over selects overfrequency protection.
Sensing Source
Underfrequency or overfrequency protection can be applied to the voltage sensed at the BE1-11g phase
VT input or auxiliary VT (Vx) input. A Source setting of Phase VT selects the voltage sensed at the phase
VT input and a Source setting of Aux VT selects the voltage sensed at the Vx input.
Security of a load shedding scheme can be enhanced by monitoring two independent VT circuits.
BE1-11g Frequency (81) Protection
80 9424200994 Rev N
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured frequency decreases below (underfrequency
protection) or increases above (overfrequency protection) the frequency threshold established by the
Pickup setting for three consecutive sensing voltage cycles. In BESTlogicPlus, the Pickup output can be
connected to other logic elements to annunciate the condition, control other elements in logic, and start
the fault recorder (logic element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay setting. A Time Delay setting of zero (0) makes the 81 element
instantaneous with no intention al tim e delay.
If the pickup condition subsides before the element delay expires, the timer and Pickup output are reset,
no corrective action is taken, and the element is rearmed for any other occurrences of underfrequency or
overfrequency.
Trip
The Trip output becomes true if an underfrequency or overfrequency pickup condition persists for the
duration of the element Time Delay setting. In BESTlogicPlus, the Trip output can be connected to other
logic elements and to a physical relay output to annunciate the condition and to initiate corrective action.
If a target is enabled for the element, the BE1-11g will record a target when the Trip output becomes true.
See the Fault Reporting chapter for more information about target reporting.
Voltage Inhibit
The Voltage Inhibit setting impedes underfrequency/overfrequency element operation during
undervoltage conditions that may occur during equipment startup. This setting is expressed in primary or
secondary voltage depending on the Settings Display Mode selected on the General Settings/Display
Units settings screen in BESTCOMSPlus and its unit of measure depends upon the phase VT connection
setting. For four-wire or phase-to-neutral sensing connections that inhibit level is expressed in Vpn. For
three-wire or phase-to-phase sensing connections the inhibit level is expressed in Vpp.
Element Blocking
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogicPlus. When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Frequency Rate-of-Cha nge P rotection
When a source of DG is suddenly separated from the electric utility, the frequency rate-of-change (ROC)
will increase or decrease rapidly. Frequency ROC protection provides high-speed detection of an
islanding situation that may not be detected by overfrequency or underfrequency protection. A frequency
ROC protection element can be used for load shedding in conjunction with an underfrequency protection
element to accelerate shedding during a substantial overload or inhibit shedding following a sudden,
transient decrease in frequency. An 81 element can be configured to respond to positive ROC, negative
ROC, or either condition.
Any of the eight 81 elements can be configured for frequency rate-of-change (ROC) protection.
Mode
An 81 element is configured for rate-of-change protection, only positive rate-of-change protection, or only
negative rate-of-change protection through the Mode setting.
Frequency (81) Protection BE1-11g
9424200994 Rev N 81
Sensing Source
Frequency ROC protection can be applied to the voltage sensed at the BE1-11g phase VT input or
auxiliary VT (Vx) input. A Source setting of Phase VT selects the voltage sensed at the phase VT input
and a Source setting of Aux VT selects the voltage sensed at the Vx input.
Security of a load shedding scheme can be enhanced by monitoring two independent VT circuits.
Pickup and Trip
When the rate of frequency change (expressed in hertz per second) exceeds the threshold established by
the Pickup setting for three consecutive sensing voltage cycles, the element Pickup output becomes true.
Pickup detection time varies according to the value of the fault frequency. When the frequency greatly
exceeds the pickup setting, pickup detection occurs very quickly. More precise and less quick pickup
detection occurs when the fault frequency is much closer to the Pickup setting. Pickup detection times are
summarized as follows:
• Faults exceeding the pickup setting by 0.57 Hz/s are detected in 2 cycles
• Faults exceeding the pickup setting by 0.24 Hz/s are detected in 4 cycles
• Faults exceeding the pickup setting by 0.08 Hz/s are detected in 8 cycles
• No pickup detection time will be greater than 16 cycles
In BESTlogicPlus, the Pickup output can be connected to other logic elements to annunciate the condition
or control other elements in logic.
Assertion of the Pickup output initiates a timer which begins timing toward a trip. The duration of the timer
is established by the Time Delay setting. A Time Delay setting of zero (0) makes the 81 element
instantaneous (with the exception of the pickup detection time).
If an ROC pickup condition persists for the duration of the element Time Delay setting, the element Trip
output becomes true. In BESTlogicPlus, the Trip output can be connected to other logic elements or a
physical relay output to annunciate the condition and initiate corrective action. If a target is enabled for the
element, the BE1-11g will record a target when the Trip output becomes true. See the Fault Reporting
chapter for more information about target reporting.
If the pickup condition subsides before the element time delay expires, the timer and Pickup output are
reset, no corrective action is taken, and the element is rearmed for any other occurrences of a frequency
ROC fault.
Inhibit Functions
Frequency ROC protection can be inhibited by the degree of underfrequency or overfrequency or the
percentage of negative sequence voltage.
The Overfrequency Inhibit setting disables frequency ROC protection when the sensed frequency
exceeds the setting threshold. Likewise, the Underfrequency Inhibit setting disables frequency ROC
protection when the sensed frequency decreases below the setting threshold.
Frequency ROC protection can be inhibited when the percentage of negative sequence voltage exceeds
the limit established by the Negative Sequence Inhibit setting. A Negative Sequence Inhibit setting of zero
(0) inhibits this feature.
Element Blocking
This input allows for logic supervision or control of the element.
Each frequency protection element has a Block logic input which when true, disables an element by
forcing the element Trip and Pickup outputs to logic 0 and resetting the element timer. An element Block
input is connected to the desired logic in BESTlogicPlus.
BE1-11g Frequency (81) Protection
82 9424200994 Rev N
Name
Logic Function
Purpose
Block
Input
Disables the 81 function when true
Trip
Output
True when the 81 element is in a trip condition
Pickup
Output
True when the 81 element is in a pickup condition
Setting
Range
Increment
Unit of Measure
Default
Disabled, Over, Under,
or Negative Rate of Change
Source
Phase VT or Aux VT
n/a
n/a
Phase VT
0 or 0.2 to 20 for ROC mode
0 or 15 to 70 for O/U mode
hertz/sec (ROC)
hertz (O/U) 0 Time Delay
0 to 600,000
varies
milliseconds
0
Logic Connections
Frequency element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus. The
frequency element logic block is illustrated in Figure 54. Logic inputs and outputs are summarized in
Table 26.
Figure 54. Frequency Element Logic Block
Table 26. Logic Inputs and Outputs
Operational Setti ngs
Frequency element operational settings are configured on the Frequency settings screen (Figure 55) in
BESTCOMSPlus. Setting ranges and defaults are summarized in Table 27.
Figure 55. Frequency Settings Screen
Table 27. Operational Settings
Mode
Pickup
Frequency (81) Protection BE1-11g
Rate of Change,
Positive Rate of Change,
n/a n/a Disabled
0.01
9424200994 Rev N 83
Setting
Range
Increment
Unit of Measure
Default
Voltage Inhibit
0 or 15 to 250
0.1
volts*
20
Over Frequency Inhibit
15 to 70 Hz
0.01
hertz
61
Under Frequency Inhibit
15 to 70 Hz
0.01
hertz
59
Negative Sequence Inhibit
0 to 99
1
percent
20
81ROC
* Phase-to-phase and phase-to-neutral settings depend on the Phase VT and Aux VT connection
settings. Refer to the Configuration chapter for more information on these settings.
BE1-11g Frequency (81) Protection
84 9424200994 Rev N
Frequency (81) Protection BE1-11g
9424200994 Rev N 85
Negative-Sequence Overcurrent (46) Protection
Negative-sequence overcurrent protection is included as a mode of the 50 (Instantaneous Overcurrent)
and the 51 (Inverse Overcurrent) elements. Refer to the chapters on Instantaneous Overcurrent (50)
Protection and Inverse Overcurrent (51) Protection for information on how to set up and program the I2
(negative-sequence overcurrent) mode of the 50 and the 51 elements.
For years, protection engineers have enjoyed increased sensitivity to phase-to-ground unbalances with
the application of ground relays. Ground relays can be set more sensitively than phase relays because a
balanced load has no ground (3I0) current component. When using negative-sequence mode, the 50 and
51 elements can provide similar increased sensitivity to phase-to-phase faults because a balanced load
has no negative-sequenc e ( I2) current component.
Pickup Settings
A typical setting when using negative-sequence mode for the 50 or 51 elements might be one-half the
phase pickup setting in order to achieve equal sensitivity to phase-to-phase faults as three-phase faults.
This number comes from the fact that the magnitude of the current for a phase-to-phase fault is
(87%) of the three-phase fault at the same location. This is illustrated in
Figure 56.
/2
3
√
Figure 56. Phase-to-Phase Fault Magnitude
The phase-to-phase fault is made up of both positive and negative-sequence components as shown in
Figure 57
the magnitude of the total phase current. When these two factors (
factors cancel which leaves the one-half factor.
BE1-11g Negative-Sequence Overcurrent (46) Protection
or a phase-to-phase fault, the magnitude of the negative-sequence component is 1/√3 (58%) of
3
/2 and 1/√3) are combined, the √3
√
86 9424200994 Rev N
Fault Type
Multiplier
Ph-Ph
m = 1.732
Ph-Ph-G
m > 1.732
Ph-G
m = 3
three-phase
m = infinity
Figure 57. Sequence Components for an A-B Fault
Coordination Settings
The 51-x negative-sequence settings should be checked for coordination with phase-only sensing devices
such as downstream fuses and reclosers and/or ground relays. To plot the negative-sequence time
current characteristics on the same plot for the phase devices, you need to multiply the negativesequence element pickup value by the correct multiplier. The multiplier is the ratio of phase current to
negative-sequence current for the fault type for which you are interested. To plot the negative-sequence
time current characteristics on the same plot for the ground devices, you need to multiply the pickup value
by the multiplier for phase-to-ground faults (see Table 28).
Table 28. Fault Type Multipliers
For example, a downstream phase 51-x element has a pickup of 150 amperes. The upstream 51-x
negative-sequence element has a pickup of 200 amperes. To check the coordination between these two
elements for a phase-to-phase fault, the phase overcurrent element would be plotted normally with pickup
at 150 amperes. The 51-x negative-sequence element would be shifted to the right by the appropriate
factor m. Thus, the characteristic would be plotted on the coordination graph with pickup at: (200
amperes) ∗ 1.732 = 346 amperes.
Generally, for coordination with downstream phase overcurrent devices, phase-to-phase faults are the
most critical to consider. All other fault types result in an equal or greater shift of the time current
characteristic curve to the right on the plot.
Negative-Sequence Overcurrent (46) Protection BE1-11g
9424200994 Rev N 87
Instantaneous Overcurrent (50) Protection
Six instantaneous overcurrent (50) elements monitor the current applied to the BE1-11g. An element can
be configured to protect against overcurrent by monitoring a single- or three-phase system, neutral
current, positive-sequence current, negative-sequence current, ground current, or unbalanced current.
The six, identical instantaneous overcurrent protection elements are designated 50-1, 50-2, 50-3, 50-4,
50-5, and 50-6. Element logic connections are made on the BESTlogic™Plus screen in BESTCOMSPlus®
and element operational settings are configured on the Instantaneous Overcurrent settings screen in
BESTCOMSPlus. A summary of the logic inputs and outputs and operational settings appears at the end
of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Current, Instantaneous Overcurrent
(50)
HMI Navigation Path: Settings Explorer, Protection, Settings Group x (where x = 0 to 3), Current
Protection, Instant Overcurrent 50
Element Operation
Instantaneous overcurrent protection can be used to protect equipment from damage caused by phase
failure, forward/reverse phase sequence, or phase unbalance.
Modes of Protection
Nine modes of protection are available: IA, IB, IC, Three-Phase, 3I0, I1, I2, IG, and Unbalance.
IA, IB, or IC Mode
The instantaneous overcurrent protection elements include three independent comparators, one for each
phase. Mode selection determines which phase pickup is required to activate protection.
Three-Phase Mode
The instantaneous overcurrent protection elements include three independent comparators, one for each
phase. Protection is activated when any of the three phases increases above the Pickup setting.
3I0 Mode
3I0 mode provides neutral overcurrent protection in a three-phase system.
I1 Mode
I1 mode provides positive-sequence overcurrent protection in a three-phase system.
I2 Mode
I2 mode provides negative-sequence overcurrent protection in a three-phase system. Refer to the
Negative-Sequence Overcurrent (46) Protection chapter for more information.
IG Mode
IG mode provides ground fault protection in a three-phase system.
Unbalance Mode
Unbalance mode provides unbalanced current protection. Two methods are available to calculate
unbalanced current. The first method is based on the negative-sequence current divided by the positivesequence current while the second method is based on the average current. The calculation method must
BE1-11g Instantaneous Overcurrent (50) Protection
88 9424200994 Rev N
be specified on the System Parameters, Sensing Transformers screen in BESTCOMSPlus. Refer to the
Configuration chapter for more information.
CT Source
The CT Source setting configures an instantaneous overcurrent element to monitor CT circuit 1 or CT
circuit 2 on protection systems equipped with two sets of CTs. CT circuit 1 terminals are designated D1
(IA1) through D8 (IG1) and CT circuit 2 terminals are designated F1 (IA2) through F8 (IG2). For an
illustration, refer to the Terminals and Connectors chapter.
Direction
An instantaneous overcurrent element can be configured for forward or reverse tripping. Refer to the
Directional Overcurrent Protection (67) chapter for more information.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured current increases above the current threshold
established by the Pickup setting. In BESTlogicPlus, the Pickup output can be connected to other logic
elements to annunciate the condition, con tr ol other elements in logic, and start the fault recorder (logic
element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay setting. A Time Delay of zero (0) makes the 50 element instantaneous with
no intentional time delay.
If the pickup condition subsides before the element delay expires, the timer and Pickup output are reset,
no corrective action is taken, and the element is rearmed for any other occurrences of overcurrent.
Trip
The Trip output becomes true if an overcurrent condition persists for the duration of the element Time
Delay setting. In BESTlogicPlus, the Trip output can be connected to other logic elements and to a
physical relay output to annunciate the condition and to initiate corrective action. If a target is enabled for
the element, the BE1-11g will record a target when the Trip output becomes true. See the Fault Reporting
chapter for more information about target reporting.
Element Blocking
The Block input provides logic-supervision control of the element. When true, the Block input disables the
element by forcing the Trip and Pickup outputs to logic 0 and resetting the element timer. Connect the
element Block input to the desired logic in BESTlogicPlus. When the element is initially selected from the
Elements view, the default condition of the Block input is a logic 0.
Logic Connections
Instantaneous overcurrent element logic connections are made on the BESTlogicPlus screen in
BESTCOMSPlus. The instantaneous overcurrent element logic block is illustrated in Figure 58. Logic
inputs and outputs are summarized in Table 29.
Figure 58. Instantaneous Overcurrent Element Logic Block
Instantaneous Overcurrent (50) Protection BE1-11g
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