Siemens SIPROTEC 4 7SD80 User Manual
Preface
Open Source Software
Table of Contents
SIPROTEC 4
Line Differential Protection
7SD80
V4.7
Manual
Introduction
Functions
Mounting and Commissioning
Technical Data
Ordering Information and Accessories
Terminal Assignments
Connection Examples
Current Transformer Requirements
Default Settings and Protocol-dependent
Functions
1
2
3
4
A
B
C
D
E
E50417-G1100-C474-A2
Functions, Settings, Information
Literature
Glossary
Index
F
i
i
NOTE
For your own safety, observe the warnings and safety instructions contained in this document, if available.
Disclaimer of Liability
This document has been subjected to rigorous technical
review before being published. It is revised at regular intervals, and any modifications and amendments are included
in the subsequent issues. The content of this document has
been compiled for information purposes only. Although
Siemens AG has made best efforts to keep the document as
precise and up-to-date as possible, Siemens AG shall not
assume any liability for defects and damage which result
through use of the information contained herein.
This content does not form part of a contract or of business
relations; nor does it change these. All obligations of
Siemens AG are stated in the relevant contractual agreements.
Siemens AG reserves the right to revise this document from
time to time.
Document version: E50417-G1100-C474-A2.01
Edition: 02.2018
Version of the product described: V4.7
Copyright
Copyright © Siemens AG 2018. All rights reserved.
The disclosure, duplication, distribution and editing of this
document, or utilization and communication of the content
are not permitted, unless authorized in writing. All rights,
including rights created by patent grant or registration of a
utility model or a design, are reserved.
Registered Trademarks
SIPROTEC®, DIGSI®, SIGUARD®, SIMEAS®, and SICAM® are
registered trademarks of Siemens AG. Any unauthorized
use is illegal. All other designations in this document can
be trademarks whose use by third parties for their own
purposes can infringe the rights of the owner.
Preface
Purpose of the Manual
This manual describes the functions, operation, installation, and commissioning of devices 7SD80. In particular, one will find:
Information regarding the configuration of the scope of the device and a description of the device func-
•
tions and settings → Chapter 2;
Instructions for Installation and Commissioning → Chapter 3;
•
Compilation of the Technical Data → Chapter 4;
•
As well as a compilation of the most significant data for advanced users → Appendix.
•
General information with regard to design, configuration, and operation of SIPROTEC 4 devices are set out in
the SIPROTEC 4 System Description /1/ SIPROTEC 4 System Description.
Target Audience
Protection-system engineers, commissioning engineers, persons entrusted with the setting, testing and maintenance of selective protection, automation and control equipment, and operating personnel in electrical
installations and power plants.
Scope
This manual applies to: SIPROTEC 4 Line Differential Protection 7SD80; Firmware-Version V4.7.
Indication of Conformity
Additional Standards IEEE Std C37.90 (see Chapter 4 "Technical Data")
This product is UL-certified according to the Technical Data. file E194016
[ul-schutz-7sx80-100310, 1, --_--]
This product complies with the directive of the Council of the European Communities on the
approximation of the laws of the Member States relating to electromagnetic compatibility
(EMC Council Directive 2004/108/EC) and concerning electrical equipment for use within
specified voltage limits (Low-voltage Directive 2006/95 EC).
This conformity is proved by tests conducted by Siemens AG in accordance with the Council
Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 for EMC
directive, and with the standard EN 60255-27 for the low-voltage directive.
The device has been designed and produced for industrial use.
The product conforms with the international standards of the series IEC 60255 and the
German standard VDE 0435.
SIPROTEC 4, 7SD80, Manual
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3
!
!
!
Preface
Additional Support
For questions about the system, please contact your Siemens sales partner.
Support
Our Customer Support Center provides a 24-hour service.
Phone: +49 (180) 524-7000
Fax: +49 (180) 524-2471
E-Mail: support.energy@siemens.com
Training Courses
Inquiries regarding individual training courses should be addressed to our Training Center:
Siemens AG
Siemens Power Academy TD
Humboldtstraße 59
90459 Nürnberg
Germany
Phone: +49 (911) 433-7415
Fax: +49 (911) 433-7929
E-Mail: poweracademy@siemens.com
Internet: www.siemens.com/poweracademy
Notes on Safety
This document is not a complete index of all safety measures required for operation of the equipment (module
or device). However, it comprises important information that must be followed for personal safety, as well as
to avoid material damage. Information is highlighted and illustrated as follows according to the degree of
danger:
DANGER
DANGER means that death or severe injury will result if the measures specified are not taken.
²
WARNING
WARNING means that death or severe injury may result if the measures specified are not taken.
²
CAUTION
Comply with all instructions, in order to avoid death or severe injuries.
Comply with all instructions, in order to avoid death or severe injuries.
CAUTION means that medium-severe or slight injuries can occur if the specified measures are not taken.
Comply with all instructions, in order to avoid moderate or minor injuries.
²
4 SIPROTEC 4, 7SD80, Manual
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NOTICE
i
i
NOTICE means that property damage can result if the measures specified are not taken.
Comply with all instructions, in order to avoid property damage.
²
NOTE
Important information about the product, product handling or a certain section of the documentation
which must be given particular attention.
Qualified Electrical Engineering Personnel
Only qualified electrical engineering personnel may commission and operate the equipment (module, device)
described in this document. Qualified electrical engineering personnel in the sense of this manual are people
who can demonstrate technical qualifications as electrical technicians. These persons may commission,
isolate, ground and label devices, systems and circuits according to the standards of safety engineering.
Proper Use
The equipment (device, module) may be used only for such applications as set out in the catalogs and the
technical description, and only in combination with third-party equipment recommended and approved by
Siemens.
Problem-free and safe operation of the product depends on the following:
Proper transport
•
Proper storage, setup and installation
•
Proper operation and maintenance
•
When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper
action is not taken, death, severe injury or property damage can result:
The equipment must be grounded at the grounding terminal before any connections are made.
•
All circuit components connected to the power supply may be subject to dangerous voltage.
•
Hazardous voltages may be present in equipment even after the supply voltage has been disconnected
•
(capacitors can still be charged).
Preface
Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the
•
equipment, ensure that the current-transformer circuits are short-circuited.
The limiting values stated in the document must not be exceeded. This must also be considered during
•
testing and commissioning.
Typographic and Symbol Conventions
The following text formats are used when literal information from the device or to the device appear in the
text flow:
Parameter Names
Designators of configuration or function parameters which may appear word-for-word in the display of the
device or on the screen of a personal computer (with operation software DIGSI), are marked in bold letters in
monospace type style. The same applies to titles of menus.
1234A
Parameter addresses have the same character style as parameter names. Parameter addresses contain the
suffix A in the overview tables if the parameter can only be set in DIGSI via the option Display additional
settings.
Parameter Options
Possible settings of text parameters, which may appear word-for-word in the display of the device or on the
screen of a personal computer (with operation software DIGSI), are additionally written in italics. The same
applies to the options of the menus.
SIPROTEC 4, 7SD80, Manual 5
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Preface
Indications
Designators for information, which may be output by the relay or required from other devices or from the
switch gear, are marked in a monospace type style in quotation marks.
Deviations may be permitted in drawings and tables when the type of designator can be obviously derived
from the illustration.
The following symbols are used in drawings:
Device-internal logical input signal
Device-internal logical output signal
Internal input signal of an analog quantity
External binary input signal with number (binary input,
input indication)
External binary output signal with number
(example of a value indication)
External binary output signal with number (device indication) used as
input signal
Example of a parameter switch designated FUNCTION with address
1234 and the possible settings ON and OFF
Besides these, graphical symbols are used in accordance with IEC 60617-12 and IEC 60617-13 or similar.
Some of the most frequently used are listed below:
Analog input variable
AND-gate operation of input values
OR-gate operation of input values
Exclusive OR gate (antivalence): output is active, if only one of the
inputs is active
Coincidence gate: output is active, if both inputs are active or inactive
at the same time
Dynamic inputs (edge-triggered) above with positive, below with
negative edge
Formation of one analog output signal from a number of analog input
signals
Limit stage with setting address and parameter designator (name)
Timer (pickup delay T, example adjustable) with setting address and
parameter designator (name)
6 SIPROTEC 4, 7SD80, Manual
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Timer (dropout delay T, example non-adjustable)
Dynamic triggered pulse timer T (monoflop)
Static memory (SR flipflop) with setting input (S), resetting input (R),
output (Q) and inverted output (Q), setting input dominant
Static memory (RS-flipflop) with setting input (S), resetting input (R),
output (Q) and inverted output (Q), resetting input dominant
Preface
SIPROTEC 4, 7SD80, Manual 7
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Open Source Software
The product contains, among other things, Open Source Software developed by third parties. The Open
Source Software used in the product and the license agreements concerning this software can be found in the
Readme_OSS. These Open Source Software files are protected by copyright. Your compliance with those
license conditions will entitle you to use the Open Source Software as foreseen in the relevant license. In the
event of conflicts between Siemens license conditions and the Open Source Software license conditions, the
Open Source Software conditions shall prevail with respect to the Open Source Software portions of the software. The Open Source Software is licensed royalty-free. Insofar as the applicable Open Source Software
License Conditions provide for it you can order the source code of the Open Source Software from your
Siemens sales contact - against payment of the shipping and handling charges - for a period of at least 3 years
since purchase of the Product. We are liable for the Product including the Open Source Software contained in
it pursuant to the license conditions applicable to the Product. Any liability for the Open Source Software
beyond the program flow intended for the Product is explicitly excluded. Furthermore any liability for defects
resulting from modifications to the Open Source Software by you or third parties is excluded. We do not
provide any technical support for the Product if it has been modified.
SIPROTEC 4, 7SD80, Manual
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Table of Contents
Preface..........................................................................................................................................................3
Open Source Software..................................................................................................................................9
1 Introduction................................................................................................................................................19
1.1 Overall Operation..............................................................................................................20
1.2 Application Scope............................................................................................................. 23
1.3 Characteristics.................................................................................................................. 25
2 Functions.................................................................................................................................................... 29
2.1 General.............................................................................................................................30
2.1.1 Functional Scope......................................................................................................... 30
2.1.1.1 Functional Description........................................................................................... 30
2.1.1.2 Setting Notes......................................................................................................... 30
2.1.1.3 Settings................................................................................................................. 32
2.1.2 Device, General Settings.............................................................................................. 33
2.1.2.1 Functional Description........................................................................................... 33
2.1.2.2 Setting Notes......................................................................................................... 34
2.1.2.3 Settings................................................................................................................. 34
2.1.2.4 Information List..................................................................................................... 34
2.1.3 General Power System Data (Power System Data 1)......................................................36
2.1.3.1 Setting Notes......................................................................................................... 36
2.1.3.2 Settings................................................................................................................. 38
2.1.4 Oscillographic Fault Records........................................................................................ 39
2.1.4.1 Functional Description........................................................................................... 40
2.1.4.2 Setting Notes......................................................................................................... 40
2.1.4.3 Settings................................................................................................................. 40
2.1.4.4 Information List..................................................................................................... 40
2.1.5 Change Group............................................................................................................. 40
2.1.5.1 Functional Description........................................................................................... 41
2.1.5.2 Setting Notes......................................................................................................... 41
2.1.5.3 Settings................................................................................................................. 41
2.1.5.4 Information List..................................................................................................... 41
2.1.6 General Protection Data (Power System Data 2)........................................................... 42
2.1.6.1 Setting Notes......................................................................................................... 42
2.1.6.2 Settings................................................................................................................. 43
2.1.6.3 Information List..................................................................................................... 44
2.1.7 EN100-Modul 1........................................................................................................... 45
2.1.7.1 Functional Description........................................................................................... 45
2.1.7.2 Information List..................................................................................................... 45
2.1.8 Protection Interface..................................................................................................... 45
2.1.8.1 Functional Description........................................................................................... 45
2.1.8.2 Setting Notes......................................................................................................... 46
2.1.8.3 Settings................................................................................................................. 46
2.1.8.4 Information List..................................................................................................... 47
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Table of Contents
2.2 Phase Comparison Protection and Ground Differential Protection.......................................48
2.2.1 Differential Topology................................................................................................... 48
2.2.1.1 Setting Notes......................................................................................................... 48
2.2.1.2 Settings................................................................................................................. 48
2.2.1.3 Information List..................................................................................................... 48
2.2.2 Phase Comparison Protection.......................................................................................49
2.2.2.1 Functional Description........................................................................................... 49
2.2.2.2 Setting Notes......................................................................................................... 53
2.2.3 Ground Current Differential Protection in Grounded Systems........................................54
2.2.3.1 Funktionsbeschreibung..........................................................................................54
2.2.3.2 Setting Notes......................................................................................................... 57
2.2.4 Restricted Ground-Fault Protection in Resonant-grounded/Isolated Systems..................58
2.2.4.1 Funktionsbeschreibung..........................................................................................58
2.2.4.2 Setting Notes......................................................................................................... 61
2.2.5 Differential Protection Pickup Logic and Tripping Logic.................................................62
2.2.5.1 Functional Description........................................................................................... 62
2.2.6 87 Differential Protection.............................................................................................63
2.2.6.1 Settings................................................................................................................. 63
2.2.6.2 Information List..................................................................................................... 64
2.2.7 Differential Protection Test and Commissioning........................................................... 65
2.2.7.1 Differential Protection Test.....................................................................................65
2.2.7.2 Differential Protection Commissioning....................................................................66
2.3 Breaker Intertrip and Remote Tripping............................................................................... 69
2.3.1 Functional Description.................................................................................................69
2.3.2 Setting Notes...............................................................................................................70
2.3.3 Settings.......................................................................................................................71
2.3.4 Information List...........................................................................................................71
2.4 Backup overcurrent........................................................................................................... 72
2.4.1 Operating Modes.........................................................................................................72
2.4.2 Non-directional Overcurrent Protection........................................................................72
2.4.3 Directional Overcurrent Protection...............................................................................76
2.4.4 Setting Notes...............................................................................................................82
2.4.5 Settings.......................................................................................................................85
2.4.6 Information List...........................................................................................................88
2.5 InRush Restraint................................................................................................................ 91
2.5.1 Functional Description.................................................................................................91
2.5.2 Setting Notes...............................................................................................................92
2.5.3 Settings.......................................................................................................................92
2.5.4 Information List...........................................................................................................93
2.6 Circuit Breaker Failure Protection 50BF.............................................................................. 94
2.6.1 Functional Description.................................................................................................94
2.6.2 Setting Notes.............................................................................................................100
2.6.3 Settings.....................................................................................................................102
2.6.4 Information List.........................................................................................................103
2.7 Thermal Overload Protection 49...................................................................................... 104
2.7.1 Functional Description...............................................................................................104
2.7.2 Setting Notes.............................................................................................................105
2.7.3 Settings.....................................................................................................................107
2.7.4 Information List.........................................................................................................107
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Table of Contents
2.8 Undervoltage and Overvoltage Protection (optional) 27/59..............................................108
2.8.1 Overvoltage Protection (ANSI 59)...............................................................................108
2.8.2 Undervoltage Protection (ANSI 27)............................................................................ 112
2.8.3 Setting Notes.............................................................................................................115
2.8.4 Settings.....................................................................................................................117
2.8.5 Information List.........................................................................................................119
2.9 Frequency Protection (optional) 81................................................................................. 123
2.9.1 Functional Description...............................................................................................123
2.9.2 Setting Notes.............................................................................................................125
2.9.3 Settings.....................................................................................................................127
2.9.4 Information List.........................................................................................................127
2.10 Direct Local Trip.............................................................................................................. 129
2.10.1 Functional Description...............................................................................................129
2.10.2 Setting Notes.............................................................................................................129
2.10.3 Settings.....................................................................................................................130
2.10.4 Information List.........................................................................................................130
2.11 Automatic Reclosure Function (optional) 79.................................................................... 131
2.11.1 Functional Description...............................................................................................131
2.11.2 Setting Notes.............................................................................................................136
2.11.3 Settings.....................................................................................................................139
2.11.4 Information List.........................................................................................................140
2.12 Circuit Breaker Test......................................................................................................... 142
2.12.1 CB Close Detection.................................................................................................... 142
2.12.2 Circuit-Breaker Position Detection.............................................................................. 144
2.12.3 Circuit-Breaker Test....................................................................................................146
2.12.4 Information List.........................................................................................................146
2.13 Direct Remote Trip and Transmission of Binary Information..............................................147
2.13.1 Functional Description...............................................................................................147
2.13.2 Information List.........................................................................................................147
2.14 Monitoring Functions......................................................................................................149
2.14.1 Measurement Supervision......................................................................................... 149
2.14.1.1 Hardware Monitoring...........................................................................................149
2.14.1.2 Software Monitoring ........................................................................................... 150
2.14.1.3 External Transformer Circuits............................................................................... 150
2.14.1.4 Fault Responses................................................................................................... 158
2.14.1.5 Setting Notes....................................................................................................... 159
2.14.1.6 Settings............................................................................................................... 160
2.14.1.7 Information List................................................................................................... 161
2.14.2 74TC Trip Circuit Supervision..................................................................................... 162
2.14.2.1 Functional Description......................................................................................... 162
2.14.2.2 Setting Notes....................................................................................................... 165
2.14.2.3 Settings............................................................................................................... 165
2.14.2.4 Information List................................................................................................... 165
2.15 Flexible Protection Functions...........................................................................................167
2.15.1 Functional Description...............................................................................................167
2.15.2 Setting Notes.............................................................................................................170
2.15.3 Settings.....................................................................................................................174
2.15.4 Information List.........................................................................................................175
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Table of Contents
2.16 Function Logic................................................................................................................ 177
2.16.1 Pickup Logic for the Entire Device.............................................................................. 177
2.16.2 Tripping Logic for the Entire Device............................................................................177
2.17 Auxiliary Functions..........................................................................................................181
2.17.1 Message Processing...................................................................................................181
2.17.1.1 LEDs and Binary Outputs (Output Relays)..............................................................181
2.17.1.2 Information via Display Field or PC........................................................................181
2.17.1.3 Information to a Control Center............................................................................182
2.17.2 Statistics....................................................................................................................183
2.17.2.1 Functional Description......................................................................................... 183
2.17.2.2 Information List................................................................................................... 183
2.17.3 Measurement During Operation.................................................................................184
2.17.3.1 Functional Description......................................................................................... 184
2.17.3.2 Information List................................................................................................... 185
2.17.4 Differential Protection Values.....................................................................................186
2.17.4.1 Measured Values of the Differential Protection..................................................... 186
2.17.4.2 Information List................................................................................................... 186
2.17.5 Measured Values Constellation.................................................................................. 186
2.17.5.1 Functional Description......................................................................................... 186
2.17.6 Min/Max Measurement Setup.................................................................................... 187
2.17.6.1 Functional Description......................................................................................... 187
2.17.6.2 Setting Notes....................................................................................................... 187
2.17.6.3 Settings............................................................................................................... 187
2.17.6.4 Information List................................................................................................... 188
2.17.7 Demand Measurement Setup.....................................................................................189
2.17.7.1 Functional Description......................................................................................... 189
2.17.7.2 Setting Notes....................................................................................................... 190
2.17.7.3 Settings............................................................................................................... 190
2.17.7.4 Information List................................................................................................... 190
2.17.8 Set Points (Measured Values).....................................................................................190
2.17.8.1 Setting Notes....................................................................................................... 190
2.17.8.2 Information List................................................................................................... 191
2.17.9 Energy.......................................................................................................................191
2.17.9.1 Energy Metering.................................................................................................. 191
2.17.9.2 Setting Notes....................................................................................................... 192
2.17.9.3 Information List................................................................................................... 192
2.18 Breaker Control...............................................................................................................193
2.18.1 Control Device...........................................................................................................193
2.18.1.1 Functional Description......................................................................................... 193
2.18.1.2 Information List................................................................................................... 194
2.18.2 Types of Commands.................................................................................................. 194
2.18.2.1 Functional Description......................................................................................... 194
2.18.3 Command Sequence..................................................................................................195
2.18.3.1 Functional Description......................................................................................... 195
2.18.4 Switchgear Interlocking............................................................................................. 196
2.18.4.1 Functional Description......................................................................................... 196
2.18.5 Command Logging.................................................................................................... 202
2.18.5.1 Functional Description......................................................................................... 202
2.19 Notes on Device Operation..............................................................................................203
2.19.1 Different operation....................................................................................................203
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Table of Contents
3 Mounting and Commissioning................................................................................................................. 205
3.1 Mounting and Connections............................................................................................. 206
3.1.1 Configuration Information......................................................................................... 206
3.1.2 Hardware Modifications.............................................................................................209
3.1.2.1 Disassembly.........................................................................................................209
3.1.2.2 Connections of the Current Terminals...................................................................212
3.1.2.3 Connections of the Voltage Terminals...................................................................214
3.1.2.4 Interface Modules................................................................................................ 214
3.1.2.5 Reassembly..........................................................................................................217
3.1.3 Installation................................................................................................................ 218
3.1.3.1 General................................................................................................................218
3.1.3.2 Panel Flush Mounting...........................................................................................218
3.1.3.3 Cubicle Mounting.................................................................................................219
3.1.3.4 Panel Surface Mounting....................................................................................... 220
3.2 Checking Connections.....................................................................................................222
3.2.1 Checking the Data Connections of the Interfaces........................................................222
3.2.2 Checking the Protection Data Communication............................................................224
3.2.3 Checking the System Connections............................................................................. 225
3.3 Commissioning............................................................................................................... 227
3.3.1 Test Mode and Transmission Block.............................................................................228
3.3.2 Checking Time Synchronization................................................................................. 228
3.3.3 Testing the System Interface .....................................................................................228
3.3.4 Configuring Communication Modules........................................................................230
3.3.5 Checking the Status of Binary Inputs and Outputs...................................................... 233
3.3.6 Checking the Protection Data Communication............................................................236
3.3.7 Checking Circuit Breaker Failure Protection................................................................ 238
3.3.8 Checking the Instrument Transformer Connections of One Line End...........................239
3.3.9 Checking the Instrument Transformer Connections of Two Line Ends......................... 244
3.3.10 Checking the Pilot Protection for Internal and External Remote Tripping..................... 244
3.3.11 Checking User-defined Functions...............................................................................244
3.3.12 Trip and Close Test with the Circuit Breaker................................................................244
3.3.13 Switching Check for the Configured Equipment......................................................... 245
3.3.14 Triggering Oscillographic Recording for Test...............................................................245
3.4 Final Preparation of the Device........................................................................................247
4 Technical Data.......................................................................................................................................... 249
4.1 General Device Data........................................................................................................250
4.1.1 Analog Inputs............................................................................................................250
4.1.2 Auxiliary Voltage....................................................................................................... 250
4.1.3 Binary Inputs and Outputs......................................................................................... 251
4.1.4 Communication Interfaces.........................................................................................252
4.1.5 Electrical Tests...........................................................................................................254
4.1.6 Mechanical Stress Tests............................................................................................. 256
4.1.7 Climatic Stress Tests.................................................................................................. 256
4.1.8 Service Conditions..................................................................................................... 257
4.1.9 Design.......................................................................................................................257
4.1.10 UL Certification Conditions........................................................................................ 257
4.2 Protection Interfaces and Connections.............................................................................259
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Table of Contents
4.3 87 Differential Protection Phase Comparison Protection...................................................261
4.4 Ground Fault Differential Protection in Grounded Systems...............................................264
4.5 Ground Fault Differential Protection in Resonant-grounded / Isolated Systems..................265
4.6 Breaker Intertrip and Remote Tripping- Direct Local Trip...................................................266
4.7 Time Overcurrent Protection ...........................................................................................267
4.8 Inrush Current Restraint Breaker Intertrip and Remote Tripping........................................ 274
4.9 Circuit-Breaker Failure Protection (Optional).................................................................... 275
4.10 Thermal Overload Protection 49...................................................................................... 276
4.11 Voltage Protection (Optional)..........................................................................................278
4.12 Frequency Protection (Optional)......................................................................................281
4.13 Automatic Reclosing (Optional)....................................................................................... 282
4.14 Transmission of Binary Information and Commands.........................................................283
4.15 Monitoring Functions......................................................................................................284
4.16 Flexible Protection Functions ..........................................................................................286
4.17 User-defined Functions (CFC).......................................................................................... 289
4.18 Additional Functions....................................................................................................... 293
4.19 Dimensions.....................................................................................................................296
4.19.1 Panel Flush Mounting and Cabinet Flush Mounting (Housing Size 1/6) ...................... 296
4.19.2 Panel Surface Mounting (Housing Size 1/6) ............................................................... 297
4.19.3 Bottom View............................................................................................................. 297
A Ordering Information and Accessories.....................................................................................................299
A.1 Ordering Information 7SD80 V4.7 .................................................................................. 300
A.2 Accessories.....................................................................................................................303
B Terminal Assignments..............................................................................................................................305
B.1 7SD80 — Housing for Panel Flush Mounting, Cabinet Flush Mounting and Panel
Surface Mounting .......................................................................................................... 306
C Connection Examples............................................................................................................................... 313
C.1 Connection Examples for Current and Voltage Transformers............................................314
D Current Transformer Requirements......................................................................................................... 317
D.1 Current Transformer Ratio .............................................................................................. 318
D.2 Overcurrent Factors........................................................................................................ 319
D.3 Class Conversion............................................................................................................. 320
D.4 Core Balance Current Transformer...................................................................................321
E Default Settings and Protocol-dependent Functions............................................................................... 323
E.1 LEDs............................................................................................................................... 324
E.2 Binary Input.................................................................................................................... 325
E.3 Binary Output................................................................................................................. 326
E.4 Function Keys................................................................................................................. 327
E.5 Default Display................................................................................................................328
E.6 Pre-defined CFC Charts....................................................................................................331
E.7 Protocol-dependent Functions.........................................................................................332
16 SIPROTEC 4, 7SD80, Manual
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Table of Contents
F Functions, Settings, Information..............................................................................................................333
F.1 Functional Scope............................................................................................................ 334
F.2 Settings.......................................................................................................................... 336
F.3 Information List.............................................................................................................. 352
F.4 Group Indications............................................................................................................392
F.5 Measured Values.............................................................................................................393
Literature.................................................................................................................................................. 401
Glossary.................................................................................................................................................... 403
Index.........................................................................................................................................................413
SIPROTEC 4, 7SD80, Manual 17
E50417-G1100-C474-A2, Edition 02.2018
18 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
1
Introduction
This chapter introduces the SIPROTEC 4 7SD80 and gives an overview of the device's application, properties
and functions.
1.1 Overall Operation 20
1.2 Application Scope 23
1.3 Characteristics 25
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Introduction
1.1 Overall Operation
1.1
Analog Inputs
Overall Operation
The digital SIPROTEC 7SD80 overcurrent protection is equipped with a powerful microprocessor. It allows all
tasks to be processed digitally, from the acquisition of measured quantities to sending commands to circuit
breakers. Figure 1-1 shows the basic structure of the 7SD80 device.
The measuring inputs (MI) convert the currents and voltages coming from the instrument transformers and
adapt them to the level appropriate for the internal processing of the device. The device provides 4 current
transformers and - depending on the model - additionally 3 voltage transformers. Three current inputs serve
for the input of the phase currents, another current input (ΙN) may be used for measuring the ground fault
current ΙN (current transformer starpoint) or for a separate ground current transformer (for sensitive ground
fault detection ΙNs and directional determination of ground faults) - depending on the model.
[hw-struktur-7sd80-100801, 1, en_US]
Figure 1-1
There is one voltage input available for each phase-to-ground voltage. The differential protection does not
need measuring voltages due to its functional principle. Directional overcurrent protection, however, requires
the phase-to-ground voltage VA, VB and VC to be connected. Additionally, voltages can be connected that allow
displaying voltages and power values and also measuring the line voltage for automatic reclosing. The analog
quantities are forwarded to the input amplifier group (IA).
The input amplifier group IA provides high-resistance termination for the analog input quantities. It consists of
filters that are optimized for measured value processing with regard to bandwidth and processing speed.
20 SIPROTEC 4, 7SD80, Manual
Hardware structure of the 7SD80 differential protection
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The analog-to-digital (AD) element consists of an analog-to-digital (A/D) converter and memory components
for data transmission to the microcomputer system.
Microcomputer System
Apart from processing the measured values, the microcomputer system μC also executes the actual protection
and control functions. They especially consist of:
Filtering and preparation of the measured quantities
•
Continuous monitoring of the measured quantities
•
Monitoring of the pickup conditions for the individual protection functions
•
Interrogation of limit values and time sequences
•
Control of signals for the logic functions
•
Decision on trip and close commands
•
Recording of messages, fault data and fault values for analysis
•
Administration of the operating system and its functions, e.g. data storage, realtime clock, communica-
•
tion, interfaces, etc.
Formation of the local differential protection values (phase comparision for phase-to-phase faults and
•
phasor analysis for phase-to-ground faults) and creation of the transmission protocol
Decoding the received transmission protocol, synchronization of differential protection values and
•
totaling the differential currents and charge currents
Introduction
1.1 Overall Operation
Monitoring the communication with the device of the remote end
•
The information is provided via output amplifier OA.
Binary Inputs and Outputs
Binary inputs and outputs to and from the computer system are relayed via the input/output modules. The
computer system obtains information from the system (e.g. remote resetting) or from other devices (e.g.
blocking commands). Outputs are, in particular, commands to the switchgear units and annunciations for
remote signaling of important events and statuses.
Front Elements
Information such as messages related to events, states, measured values and the functional status of the
device are visualized by light-emitting diodes (LEDs) and a display screen (LCD) on the front panel.
Integrated control and numeric keys in conjunction with the LCD enable communication with the remote
device. These elements enable the user to retrieve all device information such as configuration and setting
parameters, operational indications and fault indications or measured values and to edit setting parameters.
In addition, control of circuit breakers and other equipment is possible from the front panel of the device.
Interfaces
Communication with a PC can be implemented via the USB DIGSI interface using the DIGSI software allowing
the user to conveniently handle all device functions.
Port A can be used as protection interface to communicate with another 7SD80 device via an optical fiber
cable.
If you are using a copper link to create a connection to the other 7SD80 device, use the voltage terminals D1
and D2 as protection interface.
The protection data interfaces are used to transfer the data of the measured quantities from each end of the
protected zone to the opposite end. Further information such as closing of the local circuit breaker or other
externally injected trip commands can be transmitted to the opposite end via the protection interface.
In addition to the device communication via DIGSI, Port B can also be used to transmit all device data to a
central evaluator or a control center. This interface may be provided with various protocols and physical transmission schemes to suit the particular application.
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Introduction
1.1 Overall Operation
Power Supply
The functional units described are supplied by a power supply (PS) with the adequate power in the different
voltage levels. Transient voltage dips may occur if the auxiliary voltage supply system becomes short-circuited.
Usually, they are bridged by a capacitor storage (see also the Section 4 Technical Data).
A buffer battery is located behind the lower front cover.
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Introduction
1.2 Application Scope
1.2
Protection Functions
Application Scope
The digital Line Differential Protection SIPROTEC 4 7SD80 is a selective short-circuit protection for overhead
lines and cables with single- and multi-ended infeeds in radial, ring or any type of meshed systems of any
transmission level. The measured data are compared separately for each phase.
A major advantage of the differential protection principle is the instantaneous tripping in the event of a short
circuit at any point within the entire protected zone. The current transformers limit the protected zone at the
ends towards the remaining system. This rigid delimitation is the reason why the differential protection
scheme shows such an ideal selectivity.
The differential protection system requires a 7SD80 device as well as a set of current transformers at either
end of the protected zone. Voltage transformers are not required for the differential protection functions in
the 7SD80; they are, however, available to record and display measured values (voltages, power, power
factor) or when using a directional overcurrent protection element.
The devices located at the ends of the protected zone exchange measuring information via protection interfaces using communication links (usually optical fiber or copper cables).
Since fault-free data transmission is the prerequisite for the proper operation of the protection, it is continuously monitored internally.
The device's basic function is to detect short-circuits or ground faults in the protected zone – even weakcurrent or high-resistance short-circuits. Even complex multiphase faults are detected correctly, as the measured values are evaluated separately for each phase. The protection is restraint against inrush currents of
power transformers. When switching a line onto a fault, it is possible to send an instantaneous trip signal. The
7SD80 line differential protection includes the differential protection functions of phase comparison protection and ground fault differential protection. Both differential protection functions operate independently of
each other.
In the event of a communication failure, the devices can automatically switch to emergency operation using
an integrated overcurrent protection until communication is restored. The overcurrent protection comprises
two definite time-overcurrent protection elements and one inverse time-overcurrent protection element. Both
elements operate directional or non-directional. Additionally, the device features a third definite time-overcurrent protection element that always operates non-directionally.
For inverse time overcurrent protection, several characteristic curves of different standards are available.
Alternatively, the time overcurrent protection can be used as a backup time overcurrent protection, i.e. it oper-
ates independent of and parallel to the differential protection at either end.
The communication link can be used for transmitting further information. Besides measured values, it is
possible to transmit binary information.
All protection functions in the 7SD80 always trip 3-pole. They can work together with an integrated automatic
reclose function (optional). The automatic reclose functions enables 3-pole automatic reclosing with two
reclose attempts.
The thermal overload protection protects cables and power transformers from inadmissible heating due to
overload.
Additionally, a two-element overvoltage and undervoltage protection and a four-element frequency protection can be used. A circuit-breaker failure protection monitors the response of the circuit breaker following a
trip command.
Control Functions
The device provides a control function which can be accomplished for activating and deactivating switchgear
via operator buttons, port B, binary inputs and - using a PC and the DIGSI software - via the front interface.
The switch positions are fed back to the device via auxiliary contacts of the circuit breakers and binary inputs.
The current switch positions can be read out at the device and used for plausibility monitoring and interlockings. The number of the devices to be switched is limited by the binary inputs and outputs available in the
device or the binary inputs and outputs allocated for the switch position feedbacks. Depending on the equipment, one binary input (single point indication) or two binary inputs (double point indication) can be used.
The release to switch can be restricted by appropriate settings for the switching authority (remote or local),
and by the operating mode (interlocked/non-interlocked, with or without password validation). Interlocking
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Introduction
1.2 Application Scope
conditions for switching (e.g. switchgear interlocking) can be defined with the help of integrated user-configurable logic functions.
Messages and Measured Values; Recording of Event and Fault Data
The operational indications provide information about conditions in the power system and the device. Measurement quantities and values that are calculated can be displayed locally and communicated via the serial
interfaces.
Device messages can be assigned to a number of LEDs on the front cover (allocatable), can be externally
processed via output contacts (allocatable), linked with user-definable logic functions and/or issued via serial
interfaces.
During a fault (system fault) important events and changes in conditions are saved in fault protocols (Event
Log or Trip Log). Instantaneous fault values are also saved in the device and may be analyzed subsequently.
Communication
The following interfaces are available for communication with external operating, control and memory
systems.
The USB DIGSI interface on the front cover serves for local communication with a PC. With the SIPROTEC 4
operating software DIGSI, all operation and evaluation tasks can be executed using this operator interface, for
instance specifying and editing configuration parameters and settings, configuring user-specific logic functions, retrieving operational messages and measured values, inquiring device conditions and measured values,
issuing control commands.
Port A is located on the bottom side of the device. This protection data interface connects the device to its
partner device at the remote end of the protected object.
Alternatively, you can implement the communication link using the voltage terminals D-1 and D-2.
Port B serves for central communication between the device and a control center. It can be operated via data
lines or optical fiber cables. For the data transfer, standardized protocols according IEC 60870-5-103 are available. The integration of the devices into the SINAUT LSA and SICAM automation systems can also be implemented with this profile.
Alternatively, there are additional connection options available in connection with PROFIBUS DP and the
DNP3.0 and MODBUS protocols. If an EN100 module is available, it is also possible to use the IEC61850
protocol.
You can also use Port B to connect a time synchronization device such as DCF77 or IRIG-B.
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Introduction
1.3 Characteristics
1.3
General Properties
Phase Comparison Protection
Characteristics
Powerful 32-bit microprocessor system
•
Complete digital processing of measured values and control, from the sampling of the analog input
•
values, the processing and organization of the communication between devices up to the closing and
tripping commands to the circuit breakers.
Total galvanic and fail-safe separation of the internal processing circuits from the measuring, control and
•
supply circuits of the system via measuring transformers, binary input and output modules and DC or AC
converters
Suited for lines with two ends
•
Easy device operation using the integrated operator panel or from a connected personal computer
•
running DIGSI
Storage of fault indications as well as instantaneous values for fault recording
•
Digital protection data transmission; communication of the device through optical fiber cables
•
Communication is possible via a single copper wire pair (typically 8 km (4.97 miles), max. 20 km (12.43
•
miles), depending on the used cable type, see Section 4 Technical Data).
Permanent supervision of the protection data transmission for disturbance, failure or transfer time varia-
•
tions
Differential protection for two ends with digital protection data transmission
•
Protection for all types of short-circuits in systems with any starpoint conditioning
•
Reliable distinction between load and short-circuit conditions using adaptive measurement methods, also
•
for high-resistance faults with small fault currents
High sensitivity in light load operation, highest stability against load steps and power fluctuations
•
Due to phase segregated measurement, the pickup sensitivity is independent of the fault type
•
Detection of high-resistance, weak-current faults due to high sensitivity of the protection functions
•
Fast tripping also on weak or zero infeed ends (breaker intertrip)
•
No frequency dependency
•
Ground Fault Differential Protection for Grounded Systems
Short command time
•
High sensitivity for short circuits to ground
•
High stability against external ground faults by stabilizing the through-flowing ground current
•
Ground Fault Differential Protection for Isolated / Grounded Systems
Short command time
•
High sensitivity for short circuits to ground
•
High stability against external short-circuits to ground using the magnitude and phase relationship of the
•
ground current flowing through for stabilization
External Direct and Remote Tripping
Tripping of the local end by an external device via binary input
•
Tripping of the opposite end by local protection functions or by an external device via binary input
•
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Introduction
1.3 Characteristics
Time Overcurrent Protection
Optionally selectable as emergency function during protection data communication failure or as backup
•
function or both
A maximum of 3 definite time elements and one inverse time element, each for phase currents and
•
ground current
A maximum of 2 directional definite time elements and one directional inverse time element, each for
•
phase currents and ground current
For inverse time overcurrent protection, selection from various characteristics of different standards
•
possible
Blocking options e.g. for reverse interlocking with any element
•
Instantaneous tripping when closing onto a short circuit possible with any element
•
Inrush Current Restraint
Insensitive to inrush currents and against higher-frequency transients
•
High stability also for different current transformer saturation
•
Circuit-Breaker Failure Protection
With independent current elements for the monitoring of the current flow through each pole of the
•
circuit breaker
Separate pickup thresholds for phase and ground currents
•
Monitoring time element for tripping
•
Initiation by the trip command of each integrated protection function
•
Initiation by external trip functions possible
•
Single-element or two-element
•
No dropout and seal-in times
•
Thermal Overload Protection
Thermal replica of the current heat losses of the protected object
•
RMS measurement for all three phase currents
•
Adjustable thermal and current-dependent warning elements
•
Voltage Protection
Overvoltage and undervoltage detection with different elements
•
2 overvoltage elements for the phase-to-ground voltages
•
2 overvoltage elements for the phase-to-phase voltages
•
2 overvoltage elements for the positive sequence voltage
•
2 overvoltage elements for the negative sequence system of the voltages
•
2 overvoltage elements for the zero system of the voltages or for any other single-phase voltage
•
Adjustable dropout conditions
•
2 undervoltage elements for the phase-to-ground voltages
•
2 undervoltage elements for the phase-to-phase voltages
•
2 undervoltage elements for the positive sequence system of the voltages
•
Adjustable current criterion for undervoltage protection functions
•
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Frequency Protection 81 (Optional)
Monitoring of falling below (f<) and/or exceeding (f>) with 4 frequency limits and time delays that are
•
independently adjustable
Particularly insensitive to harmonics and abrupt phase angle changesbesonders unempfindlich gegen
•
Oberschwingungen und Phasensprünge
Wide frequency range (approx. 25 Hz to 70 Hz)
•
Automatic Reclose Function (Optional)
For reclosing after 3-pole open condition
•
2 reclosing attempts
•
With separate action times for each reclosing attempt, optionally without action times
•
With separate dead times
•
Optionally controlled by protection element pickup with separate dead times after 1-pole, 2-pole or 3-
•
pole pickup
Monitoring Functions
Reliability of the device is greatly increased because of self-monitoring of the internal measurement
•
circuits, the auxiliary power supply as well as the hardware and software
Introduction
1.3 Characteristics
Monitoring of the current transformer and voltage transformer secondary circuits using summation and
•
symmetry check techniques
Monitoring of communication with statistics showing the availability of transmission telegrams
•
Check of the consistency of protection settings at both line ends: no processor system start-up with
•
inconsistent settings which could lead to a malfunction of the differential protection system
Trip circuit monitoring possible
•
Check of local and remote measured values and comparison of both
•
Broken wire supervision for the secondary CT circuits with fast phase segregated blocking of the differen-
•
tial protection system in order to avoid malfunction
Supervision of measuring voltage failure using "Fuse Failure Monitor"
•
Flexible Protection Functions
Up to 20 customizable protection functions with 3-phase or 1-phase operation
•
Any calculated or directly measured variable can theoretically be evaluated
•
Standard protection logic with a constant (i.e. definite time) characteristic curve
•
Internal and configurable pickup and dropout delay
•
Editable indication texts
•
User-defined Logic Functions (CFC)
Internal and external signals can be logically combined to realize user-defined logic functions
•
All common logic functions
•
Time delays and limit value interrogations
•
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Introduction
1.3 Characteristics
Command Processing
Switching devices can be opened and closed manually using control keys, programmable function keys,
•
via port B (e.g. of SICAM or SCADA), or via the user interface (using a personal computer and the DIGSI
operating software)
Feedback of the circuit-breaker states via the breaker auxiliary contacts (for commands with feedback)
•
Plausibility monitoring of the circuit-breaker positions and interlocking conditions.
•
Commissioning; Operation; Maintenance
Indication of the local and remote measured values according to magnitude and phase angle
•
Indication of the calculated differential and restraint currents
•
Indication of the measured values of the communication connection, as runtime and availability
•
Additional Functions
Battery-buffered clock which can be synchronized via a synchronization signal (DCF77, IRIGB via satellite
•
receiver), binary input or system interface
Continuous calculation and indication of operational measured values on the front display, indication of
•
measured values of the far end or all ends (for devices with active interfaces)
Fault event memory (trip log) for the last eight network faults (faults in the power system), with real time
•
stamps
Fault recording and data transfer for fault recording for a maximum time range of 15 seconds.
•
Switching statistics: Counting of the trip and close commands initiated by the device as well as recording
•
of the short-circuit data and accumulation of the disconnected fault currents
Communication with central control and memory components via serial interfaces possible (depending
•
on the ordered variant), optionally via RS232, RS485 connection, modem or fiber optic cable
Commissioning aids such as connection check, direction check and circuit-breaker check
•
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2
Functions
This chapter describes the numerous functions available on the SIPROTEC 4 device 7SD80. It shows the setting
possibilities for each function in maximum configuration. Information with regard to the determination of
setting values as well as formulas, if required, are also provided.
Based on the following information, it can also be determined which of the provided functions should be
used.
2.1 General 30
2.2 Phase Comparison Protection and Ground Differential Protection 48
2.3 Breaker Intertrip and Remote Tripping 69
2.4 Backup overcurrent 72
2.5 InRush Restraint 91
2.6 Circuit Breaker Failure Protection 50BF 94
2.7 Thermal Overload Protection 49 104
2.8 Undervoltage and Overvoltage Protection (optional) 27/59 108
2.9 Frequency Protection (optional) 81 123
2.10 Direct Local Trip 129
2.11 Automatic Reclosure Function (optional) 79 131
2.12 Circuit Breaker Test 142
2.13 Direct Remote Trip and Transmission of Binary Information 147
2.14 Monitoring Functions 149
2.15 Flexible Protection Functions 167
2.16 Function Logic 177
2.17 Auxiliary Functions 181
2.18 Breaker Control 193
2.19 Notes on Device Operation 203
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i
i
Functions
2.1 General
2.1
2.1.1
2.1.1.1
Setting the Scope of Functions
General
You can edit the function parameters via the user interface or service interface from a PC running the DIGSI
software; some parameters can also be changed using the controls at the front panel of the device. The procedure is set out in detail in the /1/ SIPROTEC 4 System Description.
Functional Scope
The 7SD80 device comprises protection functions and additional functions. The hardware and firmware are
designed for this scope of functions. Additionally, the control functions can be matched to the system requirements. Individual functions can be activated or deactivated during the configuration procedure or the interaction of functions be modified.
Functional Description
Example for the configuration of the scope of functions:
A system consists of overhead lines and underground cables. Since automatic reclosing is only needed for the
overhead lines, the automatic reclosing function is disabled for the relays protecting the underground cables.
The available protection functions and additional functions can be configured as Enabled or Disabled. For
some functions, there is a choice between several alternatives possible, as described below.
Functions configured as Disabled are not processed in the 7SD80. There are no messages issued and the
corresponding settings (functions, limit values) are not queried during configuration.
NOTE
Available functions and default settings depend on the ordered variant of the relay A Ordering Information
and Accessories).
2.1.1.2
Setting the Functional Scope
Special Settings
Setting Notes
Your protection device is configured using the DIGSI software. Connect your personal computer either to the
USB port on the device front or to port B on the bottom side of the device depending on the device version
(ordering code). The operation via DIGSI is explained in the SIPROTEC 4 System Description.
The Device Configuration dialog box allows you to adjust your device to the prevailing system conditions.
Password no. 7 is required (for parameter set) to change configuration parameters in the device. Without the
password you can only read the settings but not edit and transmit them to the device.
Most settings are self-explaining. The special cases are described in the following.
If you want to use the setting group change function, set address 103 Grp Chge OPTION to Enabled. In
this case, you can select up to four different groups of function parameters between which you can switch
quickly and conveniently during operation. Only one setting group can be used when selecting the option
Disabled.
The differential protection function 87 DIFF.PROTEC. (address 112) as a main function of the device should
always be Enabled. This also applies to the supplementary functions of the differential protection such as
breaker intertrip.
The external trip initiation (address 122 DTT Direct Trip) is a command that is initiated from an external
device for tripping the local circuit breaker.
At address 126 Back-Up O/C, you can set the characteristic group which the time overcurrent protection
uses for operation. In addition to the definite-time overcurrent protection an inverse-time overcurrent protection can be configured that either operates according to an IEC characteristic (50(N) 51(N) IEC) or to an
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