Basler Electric DECS-400 User Manual

INSTRUCTION MANUAL

FOR

DECS-400

Digital Excitation Control System

Publication: 9369700990

Revision: R Jan-15

9369700990 Rev R

i

Preface

This instruction manual provides information about the installation and operation of the DECS-400 Digital Excitation Control System. To accomplish this, the following information is provided:

•General Information

•Controls and Indicators

•Functional Description

•BESTCOMS Software

•Installation

•Commissioning

•Maintenance and Troubleshooting

•Specifications

•Modbus™ Protocol

Conventions Used in this Manual

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

Caution boxes call attention to operating conditions that may lead to equipment or property damage.

Note

Note boxes emphasize important information pertaining to installation or operation.

DECS-400

Preface

ii	9369700990 Rev R

12570 State Route 143

Highland IL 62249-1074 USA

www.basler.com

[e-mail]

Tel: [phone]

Fax: [phone]

© 2015 by Basler Electric All rights reserved

First printing: January 2005

Warning!

READ THIS MANUAL. Read this manual before installing, operating, or maintaining the DECS-400. 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.

Basler Electric does not assume any responsibility to compliance or noncompliance with national code, local code, or any other applicable code. This manual serves as reference material that must be well understood prior to installation, operation, or maintenance.

This product contains, in part, open source software (software licensed in a way that ensures freedom to run, copy, distribute, study, change, and improve the software)and you are granted a license to that software under the terms of either the GNU General Public License or GNU Lesser General Public License. The licenses, at the time of sale of the product, allow you to freely copy, modify, and redistribute that software and no other statement or documentation from us, including our End User License Agreement, places any additional restrictions on what you may do with that software.

For at least three (3) years from the date of distribution of this product, a machine-readable copy of the complete corresponding source code for the version of the programs distributed to you will be sent upon request (contact information is provided above). A fee of no more than our cost of physically performing the source code distribution is charged.

The source code is distributed in the hope that it will be useful, but WITHOUT ANY REPRESENTATION or WARRANTY or even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Refer to the source code distribution for additional restrictions regarding warranty and copyrights.

For a complete copy of GNU GENERAL PUBLIC LICENSE Version 2, June 1991 or GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 refer to www.gnu.org or contact Basler Electric. You, as a Basler Electric Company customer, agree to abide by the terms and conditions of GNU GENERAL PUBLIC LICENSE Version 2, June 1991 or GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999, and as such hold Basler Electric Company harmless related to any open source software incorporated in this product. Basler Electric Company disclaims any and all liability associated with the open source software and the user agrees to defend and indemnify Basler Electric Company, its directors, officers, and employees from and against any and all losses, claims, attorneys' fees, and expenses arising from the use, sharing, or redistribution of the software. Review the software website for the latest version of the software documentation.

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.

Preface

DECS-400

9369700990 Rev R

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This publication contains confidential information of Basler Electric Company, an Illinois corporation. It is loaned for confidential use, subject to return on request, and with the mutual understanding 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 and options are subject to modification without notice. Over time, improvements and revisions may be made to this publication. Before performing any of the following procedures, contact Basler Electric for the latest revision of this manual.

The English-language version of this manual serves as the only approved manual version.

DECS-400

Preface

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Preface

DECS-400

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Contents
General Information ....................................................................................................................................	1
Features ....................................................................................................................................................	1
Generator Voltage Regulation ...............................................................................................................	2
Control Output........................................................................................................................................	2
Stability ..................................................................................................................................................	2
Power System Stabilizer (Style 1XXX) ..................................................................................................	3
Underfrequency Limiter or Volts per Hertz Limiter ................................................................................	3
Soft-Start Voltage Buildup .....................................................................................................................	3
Reactive Droop and Line Drop Compensation ......................................................................................	3
Setpoint Control .....................................................................................................................................	3
Dual Pre-Position Inputs ........................................................................................................................	3
Manual Operating Modes ......................................................................................................................	3
Var/Power Factor Operating Mode ........................................................................................................	4
Overexcitation Limiters ..........................................................................................................................	4
Minimum Excitation Limiter....................................................................................................................	4
Stator Current Limiter ............................................................................................................................	4
Reactive Power Limiter..........................................................................................................................	5
Autotracking Between DECS-400 Operating Modes.............................................................................	5
Autotracking Between DECS-400 Units ................................................................................................	5
Protective Functions ..............................................................................................................................	5
Programmable Logic..............................................................................................................................	5
Metering .................................................................................................................................................	6
Sequence of Events Recording .............................................................................................................	6
Oscillography .........................................................................................................................................	6
Real-Time Monitoring.............................................................................................................................	6
Internal Testing Provisions ....................................................................................................................	6
Communication ......................................................................................................................................	6
Password Protection..............................................................................................................................	7
Upgrading from DECS-300 to DECS-400 .................................................................................................	7
Model and Style Number ...........................................................................................................................	7
Style Number .........................................................................................................................................	7
Human-Machine Interface ..........................................................................................................................	9
Controls and Indicators..............................................................................................................................	9
Menu System...........................................................................................................................................	10
Menu Navigation ..................................................................................................................................	10
Menu Structure ....................................................................................................................................	10
Editing Settings........................................................................................................................................	20
Screens with Special Editing Modes....................................................................................................	20
Password Protection................................................................................................................................	21
Metering Screen ......................................................................................................................................	22
Metering Values ...................................................................................................................................	22
Setpoint................................................................................................................................................	23
Percent of Range.................................................................................................................................	23
Alarms Message ..................................................................................................................................	24
Operating Mode ...................................................................................................................................	25
Functional Description .............................................................................................................................	27
DECS-400 Function Blocks.....................................................................................................................	27
Analog Input Circuits............................................................................................................................	27
Front Panel Keyboard..........................................................................................................................	29
Contact Input Circuits ..........................................................................................................................	29
Digital Signal Processor.......................................................................................................................	30
Microprocessor ....................................................................................................................................	30
IRIG Port ..............................................................................................................................................	30
Memory Circuits ...................................................................................................................................	31
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Digital to Analog Converter..................................................................................................................	31
Control Output Circuits ........................................................................................................................	31
Meter Driver Circuits ............................................................................................................................	31
Relay Output Contacts.........................................................................................................................	31
Front Panel LEDs.................................................................................................................................	32
Front Panel LCD ..................................................................................................................................	32
RS-232 Communication Port ...............................................................................................................	32
RS-485 Communication Ports .............................................................................................................	32
Ethernet Port........................................................................................................................................	33
Modem .................................................................................................................................................	33
Power Supply.......................................................................................................................................	33
Startup Functions ....................................................................................................................................	33
Soft Start Function ...............................................................................................................................	33
Field Flash/Buildup ..............................................................................................................................	33
Failure to Build Up ...............................................................................................................................	34
Voltage Matching .................................................................................................................................	34
Control Modes .........................................................................................................................................	34
AVR......................................................................................................................................................	35
Manual .................................................................................................................................................	35
Var .......................................................................................................................................................	35
PF ........................................................................................................................................................	36
Control Mode Pre-Position Setpoints...................................................................................................	36
Transient Boost....................................................................................................................................	37
Protection Functions................................................................................................................................	37
Field Overcurrent .................................................................................................................................	37
Field Overvoltage.................................................................................................................................	38
Generator Undervoltage ......................................................................................................................	38
Generator Overvoltage ........................................................................................................................	38
Loss of Sensing Voltage ......................................................................................................................	38
Loss of Field Isolation Transducer.......................................................................................................	39
Generator Frequency Less Than 10 Hertz ..........................................................................................	39
Power Supply Low ...............................................................................................................................	39
Loss of Field (40Q) ..............................................................................................................................	39
Field Overtemperature.........................................................................................................................	40
Volts per Hertz (24)..............................................................................................................................	40
Exciter Diode Monitor (EDM) ...............................................................................................................	42
Voltage / Current Unbalance Detection ...............................................................................................	43
Limiter Functions .....................................................................................................................................	43
Stator Current Limiter ..........................................................................................................................	44
Overexcitation Limiter ..........................................................................................................................	44
Underexcitation Limiter ........................................................................................................................	46
Underfrequency Limiter .......................................................................................................................	47
Volts per Hertz Limiter .........................................................................................................................	48
Var Limiter............................................................................................................................................	49
Limiter Scaling .....................................................................................................................................	49
Operation with Paralleled Generators .....................................................................................................	49
Droop Compensation...........................................................................................................................	49
Reactive Differential.............................................................................................................................	49
Line Drop Compensation .....................................................................................................................	49
Autotracking.............................................................................................................................................	50
Between DECS-400 Operating Modes ................................................................................................	50
Between DECS-400 Units ...................................................................................................................	50
Data Recording and Reporting................................................................................................................	50
Sequence of Events.............................................................................................................................	50
Data Logging........................................................................................................................................	51
Trending...............................................................................................................................................	52
Power System Stabilizer..........................................................................................................................	52
PSS Theory of Operation.....................................................................................................................	53
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Rate of Frequency Change Blocking...................................................................................................	58
Field Isolation Module..............................................................................................................................	58
BESTCOMS™ Software .............................................................................................................................	59
Installation ...............................................................................................................................................	59
Installing BESTCOMS .........................................................................................................................	59
Starting BESTCOMS ...............................................................................................................................	59
The BESTCOMS Interface ..................................................................................................................	59
Communication........................................................................................................................................	61
RS-232 Port Communication ...............................................................................................................	61
Ethernet Port Communication..............................................................................................................	61
Modem Communication.......................................................................................................................	63
Settings, Metering Values, and Data Records ........................................................................................	63
System Configuration ..........................................................................................................................	63
Settings ................................................................................................................................................	71
Gain Settings .......................................................................................................................................	77
Limiters ................................................................................................................................................	81
Protection.............................................................................................................................................	88
PSS......................................................................................................................................................	93
Metering ...............................................................................................................................................	98
Data Log ............................................................................................................................................	102
Analysis..............................................................................................................................................	111
Logic ..................................................................................................................................................	120
DECS-300 Settings File Converter........................................................................................................	120
Installation ...............................................................................................................................................	121
Mounting................................................................................................................................................	121
DECS-400..........................................................................................................................................	121
Field Isolation Module........................................................................................................................	121
Isolation Power Transformer..............................................................................................................	121
Connections...........................................................................................................................................	125
DECS-400 Terminations....................................................................................................................	125
Field Isolation Module Terminations ..................................................................................................	127
DECS-400 Terminal Functions and Assignments .............................................................................	127
Field Isolation Module Terminal Functions and Assignments ...........................................................	131
Cross-Current Compensation ............................................................................................................	132
Typical Interconnections ....................................................................................................................	133
Communication Connections.............................................................................................................	136
Commissioning .......................................................................................................................................	139
Preparation ............................................................................................................................................	139
Record System Parameters...............................................................................................................	139
Testing and Evaluation..........................................................................................................................	139
Off-Line Tests—Turbine Not Spinning...............................................................................................	139
Off-Line Tests—Turbine Spinning .....................................................................................................	142
Excitation Performance Evaluation....................................................................................................	145
Recommended PSS Testing .............................................................................................................	147
Maintenance ............................................................................................................................................	149
Storage ..................................................................................................................................................	149
Warranty and Repair Service ................................................................................................................	149
Troubleshooting.....................................................................................................................................	149
DECS-400 Appears Inoperative ........................................................................................................	149
Display Blank or Frozen.....................................................................................................................	149
Generator Voltage Does Not Build ....................................................................................................	149
Generator Voltage Builds but DECS-400 Fails To Flash...................................................................	150
Field Voltage or Current Reading on LCD Does Not Change ...........................................................	150
Low Generator Voltage (In AVR Mode).............................................................................................	150
High Generator Voltage (In AVR Mode) ............................................................................................	151
Generator Voltage Unstable (Hunting) ..............................................................................................	151
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Poor Voltage Regulation....................................................................................................................	151
No Buildup in FCR Mode ...................................................................................................................	151
No Control Signal at Firing Circuit Input ............................................................................................	151
Limiters Do Not Limit at the Desired Level ........................................................................................	151
Poor Reactive Control........................................................................................................................	151
Protection or Limit Annunciation ........................................................................................................	151
Metering Readings Incorrect..............................................................................................................	151
No Communication ............................................................................................................................	151
Real-Time Clock Information Lost After Loss of Control Power ........................................................	151
DECS-400 Reboots Frequently .........................................................................................................	152
Backup Battery Replacement................................................................................................................	152
Upgrading DECS-400 Firmware............................................................................................................	152
Firmware Installation Procedure ........................................................................................................	153
Specifications..........................................................................................................................................	157
Operating Power....................................................................................................................................	157
AC Input (Style XCXX Only) ..............................................................................................................	157
DC Input (Style XCXX, XLXX) ...........................................................................................................	157
Generator Voltage Sensing ...................................................................................................................	157
50 Hertz Sensing ...............................................................................................................................	157
60 Hertz Sensing ...............................................................................................................................	157
Bus Voltage Sensing .............................................................................................................................	157
50 Hertz Sensing ...............................................................................................................................	157
60 Hertz Sensing ...............................................................................................................................	157
Generator Current Sensing ...................................................................................................................	158
Terminals ...........................................................................................................................................	158
Field Voltage and Current .....................................................................................................................	158
Field Isolation Module............................................................................................................................	158
Electrical Specifications .....................................................................................................................	158
Physical Specifications ......................................................................................................................	158
Contact Inputs .......................................................................................................................................	158
Fixed Function Inputs ........................................................................................................................	158
Programmable Inputs ........................................................................................................................	159
Terminals ...........................................................................................................................................	159
Accessory Input (Remote Setpoint Control) ..........................................................................................	159
Voltage Input......................................................................................................................................	159
Current Input ......................................................................................................................................	159
Control Outputs .....................................................................................................................................	159
Voltage Control Output ......................................................................................................................	159
Current Control Output ......................................................................................................................	160
Metering Outputs ...................................................................................................................................	160
Contact Outputs.....................................................................................................................................	160
Dedicated Outputs .............................................................................................................................	160
Programmable Outputs......................................................................................................................	160
Contact Ratings .................................................................................................................................	160
Terminal Assignments .......................................................................................................................	160
Communication Ports ............................................................................................................................	160
Com 0 ................................................................................................................................................	160
Com 1 ................................................................................................................................................	161
Com 2 ................................................................................................................................................	161
Com 3 ................................................................................................................................................	161
J1 .......................................................................................................................................................	161
IRIG .......................................................................................................................................................	161
Regulation Accuracy..............................................................................................................................	161
AVR Mode..........................................................................................................................................	161
FCR and FVR Mode ..........................................................................................................................	162
Var Control Mode...............................................................................................................................	162
Power Factor Control Mode...............................................................................................................	162
Metering Accuracy.................................................................................................................................	162
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Power System Stabilizer (PSS).............................................................................................................	162
Traverse Rates ......................................................................................................................................	162
Setpoint..............................................................................................................................................	162
Pre-Position Setpoint .........................................................................................................................	162
Setpoint Tracking...................................................................................................................................	162
Delay..................................................................................................................................................	162
Traverse Rate ....................................................................................................................................	163
Soft Start................................................................................................................................................	163
Soft Start Bias Level ..........................................................................................................................	163
Soft Start Time Delay.........................................................................................................................	163
Sequence of Events Recording.............................................................................................................	163
Data Logging (Oscillography)................................................................................................................	163
Trending ................................................................................................................................................	163
Limiters ..................................................................................................................................................	163
Underfrequency Compensation .........................................................................................................	163
Volts per Hertz ...................................................................................................................................	163
Summing Point Overexcitation Limiter...............................................................................................	164
Takeover Overexcitation Limiter ........................................................................................................	164
Underexcitation ..................................................................................................................................	164
Stator Current ....................................................................................................................................	165
Reactive Power..................................................................................................................................	165
Protection Functions..............................................................................................................................	165
Field Overvoltage...............................................................................................................................	165
Field Overcurrent ...............................................................................................................................	165
Generator Undervoltage ....................................................................................................................	165
Generator Overvoltage ......................................................................................................................	165
Loss of Sensing Voltage ....................................................................................................................	165
Generator Underfrequency ................................................................................................................	165
Loss of Field (40Q) ............................................................................................................................	165
Field Overtemperature.......................................................................................................................	165
Volts per Hertz (24)............................................................................................................................	166
Exciter Diode Failure..........................................................................................................................	166
Type Tests.............................................................................................................................................	166
Agency Certifications.............................................................................................................................	166
UL ......................................................................................................................................................	166
CE ......................................................................................................................................................	166
GOST-R .............................................................................................................................................	166
NIIPT..................................................................................................................................................	166
Real-Time Clock Battery........................................................................................................................	166
Environment ..........................................................................................................................................	167
Physical .................................................................................................................................................	167
Programmable Logic ..............................................................................................................................	169
Logic Timer Configuration..................................................................................................................	169
Logic Schemes ......................................................................................................................................	170
Default Logic Scheme........................................................................................................................	170
Predefined Logic Schemes................................................................................................................	170
Logic Scheme Modification ...................................................................................................................	184
Open “Single DECS-400 Without PSS” Logic Scheme for Editing....................................................	185
Delete Unneeded Logic Associations ................................................................................................	187
Create New Logic Associations .........................................................................................................	189
Verify and Finalize Modified Logic Scheme.......................................................................................	192
Logic for Compound Machine Paralleling..............................................................................................	192
Logic Definitions ....................................................................................................................................	195
Logic Inputs........................................................................................................................................	195
Outputs ..............................................................................................................................................	198
Modbus™ Communication......................................................................................................................	203
DECS-400 Modbus™ Protocol...............................................................................................................	203
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	Message Structure ................................................................................................................................	203
	Device Address Field.........................................................................................................................	203
	Function Code Field...........................................................................................................................	204
	Data Block Field.................................................................................................................................	204
	Error Check Field ...............................................................................................................................	204
	Modbus Modes of Operation .................................................................................................................	204
	Serial Transmission Details...................................................................................................................	204
	Message Framing and Timing Considerations ..................................................................................	205
	Error Handling and Exception Responses.........................................................................................	205
	Communication Hardware Requirements .............................................................................................	206
	RTU Communication Requirements ..................................................................................................	206
	TCP Communication Requirements ..................................................................................................	206
	Modbus™/TCP .......................................................................................................................................	206
	Detailed Message Query and Response...............................................................................................	206
	Read Holding Registers.....................................................................................................................	206
	Preset Multiple Registers...................................................................................................................	207
	Preset Single Register (Write Single Holding Register) ....................................................................	208
	Response...........................................................................................................................................	208
	Loop Back Diagnostic Test (FC=8) with Diagnostic Sub Function, Return Query Data ...................	209
	Loop Back Diagnostic Test with Diagnostic Sub-Function, Restart Communications Option...........	209
	Loop Back Diagnostic Test with Diagnostic Sub-Function, Force Slave to Listen-Only Mode .........	209
	Data Formats.........................................................................................................................................	209
	Generic Types UI8 and I8..................................................................................................................	210
	Generic Types UI16 and I16..............................................................................................................	210
	Generic Types UI32 and I32..............................................................................................................	210
	Floating Point (R23_32) Data Format................................................................................................	211
	CRC Error Check...................................................................................................................................	211
	DECS-400 Modbus™ Register Space ...................................................................................................	212
	DECS-400 Register Tables ...................................................................................................................	213
	Holding Registers for Version Data ...................................................................................................	213
	Holding Registers for Metering, Group 1 ...........................................................................................	214
	Holding Registers for System Configuration......................................................................................	216
	Holding Registers for Operating Mode Parameters...........................................................................	217
	Holding Registers for Setpoint Parameters .......................................................................................	218
	Holding Registers for Startup Parameters.........................................................................................	220
	Holding Registers for Limiter Parameters..........................................................................................	221
	Holding Registers for Gain Parameters .............................................................................................	223
	Holding Registers for Protection Function Parameters .....................................................................	224
	Holding Registers for Exciter Diode Monitor Parameters..................................................................	225
	Holding Registers for Relay Parameters ...........................................................................................	225
	Holding Registers for General ASCII and Modbus Communication Parameters ..............................	226
	Holding Registers for Metering Parameters, Group 2 .......................................................................	227
	Holding Registers for Power System Stabilizer Parameters .............................................................	227
Revision History......................................................................................................................................		231

Contents

DECS-400

9369700990 Rev R

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General Information

The DECS-400 Digital Excitation Control System is a microprocessor-based controller that offers excitation control, logic control, and optional power system stabilization in an integrated package. The DECS-400 controls field excitation by providing an analog signal used to control the firing (output) of an external power bridge. The DECS-400 monitors generator or motor parameters and acts to control, limit, and protect the machine from operating outside its capability.

The optional, onboard power system stabilizer is an IEEE-defined PSS2A, dual-input, “integral of accelerating power” stabilizer that provides supplementary damping for low-frequency, local mode and power system oscillations.

Integral programmable logic provides excitation system control and annunciation based on DECS-400 contact inputs, operating mode status, excitation system parameters, and user-defined programming. Setup and initial operation are facilitated by Basler Electric’s user-friendly BESTCOMS™ PC software that incorporates a test mode, flexible oscillography, and a graphic display of PSS test results.

The DECS-400 is designed for use with Basler Electric’s Interface Firing Module (IFM) and SSE or SSE-N power bridges. However, it will work equally well with any power bridge with a firing circuit that is compatible with the control signal output of the DECS-400.

Features

DECS-400 features and capabilities are listed below. The paragraphs following the list describe major DECS-400 features and functions in more detail.

•Five excitation control modes:

o Automatic Voltage Regulation (AVR)

o Field Current Regulation (FCR)

o Field Voltage Regulation (FVR)

o Power Factor (PF)

oVar

•Two pre-position setpoints (with adjustable traverse rate) for each excitation control mode

•Two PID groups

•Programmable analog control output selectable for 4 to 20 mAdc, –10 to +10 Vdc, or 0 to +10 Vdc

•Remote setpoint control input accepts analog voltage or current control signal

•Real-time metering

•Integrated power system stabilizer (PSS):

oGenerator or motor control modes, accommodates phase rotation changes between modes

o Speed and power sensing or speed-only sensing

oTwo-wattmeter or three-wattmeter methods of power measurement

•Soft start and voltage buildup control

•Five limiting functions:

oStator current

o	Overexcitation
o	Underexcitation

oUnderfrequency compensation

oReactive power

•Ten protection functions:

oField overvoltage

o Field overcurrent

DECS-400

General Information

2	9369700990 Rev R

oGenerator undervoltage

oGenerator overvoltage

oLoss of sensing voltage

oGenerator frequency less than 10 hertz

oLoss of field (40Q)

oField overtemperature

oVolts per hertz (24)

oExciter diode failure

•IRIG time synchronization

•Sixteen contact inputs:

oSix fixed-function inputs: AVR, Manual, Lower, Raise, Start, and Stop

oTen user-programmable inputs

•Eight contact outputs:

oTwo fixed-function outputs: Watchdog, On/Off

oSix user-programmable outputs, configurable for maintained, latched, or momentary operation

•Five communication ports:

oFront RS-232 port for interface with PC running BESTCOMS software

o Rear RS-485 port for dedicated communication with secondary, redundant DECS-400 o Rear RS-485 port using Modbus™ protocol for communication with remote terminal

o Rear RJ-11 jack connects to onboard modem that provides dial-in and dial-out capability

oRear RJ-45 jack provides Ethernet network communication

•Data logging, sequence of events recording, and trending

Generator Voltage Regulation

By utilizing digital signal processing and precise regulation algorithms, the DECS-400 regulates the generator rms voltage to within 0.2% of the setpoint from no-load to full-load.

Control Output

The DECS-400 supplies an isolated control output signal of 4 to 20 mAdc, 0 to 10 Vdc, or ±10 Vdc to the firing or control circuits of external power stages. The dc current produced by the power stages provides excitation to the field of the generator, motor, or exciter. The DECS-400 can control virtually any bridge that is capable of accepting these signals and is suitable for use on synchronous generators or motors.

Stability

PID (proportional + integral + derivative) stability control is utilized by the DECS-400. Preprogrammed stability (PID) settings are provided for both main field and exciter field applications. A suitable, standard stability set is available for most machines and applications. An additional, customizable setting group provides optimum generator transient performance. A PID selection/calculation program supplied with the DECS-400 assists in selecting the correct PID settings. Additional stability adjustments are provided for customizing the stability and transient performance of the minimum and maximum excitation limiters and the var/power factor controllers.

PID Setting Groups

The DECS-400 provides for two sets of PID settings to optimize performance under two distinct operating conditions, such as with a power system stabilizer (PSS) in or out of service. A fast controller provides optimum transient performance with the PSS in service, while a slower controller can provide improved damping of first swing oscillations with the PSS offline.

General Information

DECS-400

9369700990 Rev R

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Power System Stabilizer (Style 1XXX)

An optional, integrated PSS duplicates the excellent performance of the Basler PSS-100 power system stabilizer without the complications of an additional control device. The PSS provides damping for local mode, inter-area, and inter-unit oscillations in the 0.1 to 5.0 hertz range. The PSS incorporated in the DECS-400 is a dual-input, IEEE type PSS2A stabilizer that utilizes the “integral of accelerating power” algorithm. The PSS can also be set up to respond only to frequency if required for unusual applications. Inputs required for PSS operation include three phase voltages and two or three phase line currents.

Underfrequency Limiter or Volts per Hertz Limiter

An underfrequency limiter or a V/Hz ratio limiter can be selected to avoid overfluxing the generator or other connected magnetic devices.

The underfrequency limiter slope can be set from 0 to 3 PU V/Hz in 0.1 hertz increments. The frequency roll-off knee-point can be set across a range of 15 to 90 hertz in 0.1 hertz increments.

The V/Hz ratio limiter regulates voltage based on a user-defined V/Hz slope that is adjustable between zero and 3.0 PU. The V/Hz ratio limiter includes two limiting levels to permit operation above the primary V/Hz range for a user-adjustable time limit to inhibit limiter response during transient frequency or voltage excursions.

Soft-Start Voltage Buildup

A user-adjustable voltage soft-start feature controls the rate of generator voltage buildup and prevents voltage overshoot during generator system startup. The soft-start feature is active in both AVR and Manual operating modes.

Reactive Droop and Line Drop Compensation

The DECS-400 has provisions for paralleling two or more generators by using reactive droop. Reactive differential compensation can be used with the addition of an external current transformer (CT) with a nominal secondary rating of 1 Aac or 5 Aac. The current input burden is less than 1 VA, so existing metering CTs can be used. A Line Drop Compensation setting allows the DECS-400 to compensate for line drop between parallel generators.

Setpoint Control

External adjustment of the active DECS-400 setpoint is possible through:

•Raise and lower contact inputs

•An auxiliary analog control input of 4 to 20 mAdc or ±10 Vdc

•A PC operating BESTCOMS software (provided with the DECS-400) and connected to the RS232 communication port

•A controller using Modbus™ protocol and connected to the RS-485 port

The traverse rates of all operating modes are independently adjustable, so the operator can customize the rate of adjustment and “feel” to meet his or her needs.

Dual Pre-Position Inputs

Two user-adjustable sets of predetermined operating points are provided for each mode of operation. At startup, and with the appropriate contact inputs applied to the DECS-400, the operating mode is driven to one of two preset operating or regulation levels (depending on the configuration of the system). An adjustable traverse rate setting can be used to control the rate at which the setpoint is driven toward the pre-position operating point. This feature allows the DECS-400 to be configured for multiple system and application needs.

Manual Operating Modes

The DECS-400 has two manual modes of operation: Field Current Regulation (FCR) and Field Voltage Regulation (FVR).

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Field Current Regulation Mode

When operating in FCR mode, the DECS-400 regulates the dc output current of the power bridge. Because regulation of the field current is not dependent upon a generator voltage sensing input to the DECS-400, FCR mode can provide backup excitation control when a loss of sensing is detected. In FCR mode, as the generator load varies, the operator must manually vary the field current to maintain nominal generator voltage.

Field Voltage Regulation Mode

When operating in FVR mode, the DECS-400 regulates the dc output voltage of the power bridge. FVR enables the user to perform generator modeling and validation testing in accordance with WECC testing requirements for bus-fed (shunt type) excitation systems. FVR mode can also be used to smooth the transfer from the active exciter to a backup exciter.

Var/Power Factor Operating Mode

Var and Power Factor control modes are available when the generator is operating in parallel with the utility power grid. In Var control mode, the DECS-400 regulates the generator’s var output at a useradjustable setting. In Power Factor control mode, the DECS-400 regulates the generator’s var output to maintain a specific power factor as the kW load varies on the generator.

Overexcitation Limiters

Overexcitation limiters monitor the field current output of the voltage regulator or static exciter and act to limit the field current to prevent field overheating. The Overexcitation Limiter (OEL) function includes a cool-down feature to avoid damage to the rotor caused by repeated high forcing. The OEL is active in all modes except FCR mode. In FCR mode, limiter action is optional. The DECS-400 provides a choice of two types of overexcitation limiters: Summing Point and Takeover. The output of the Summing Point limiter is applied to the summing junction of the AVR control loop in addition to the AVR controller output. The output of the Takeover limiter overrides the normal AVR output.

Summing Point OEL

Three OEL current levels are defined for on-line operation: high, medium, and low. The generator can operate continuously at the low OEL current level and for programmed times at the medium and high OEL current levels. Two OEL current levels are defined for off-line (main breaker open) operation: high and low. The generator can operate continuously at the low OEL current level and for a programmed time at the high OEL current level.

Takeover OEL

The Takeover OEL determines the field current level at which limiting occurs by using an inverse time characteristic. Two current levels and a time dial setting are defined for the Takeover OEL. Separate curves may be selected for on-line and off-line operation. If the system enters an overexcitation condition, the field current is limited and made to follow the selected curve. Selection of on-line or off-line OEL levels and curves is determined by an OEL option selection.

Minimum Excitation Limiter

The Minimum Excitation Limiter prevents the excitation, being supplied to the generator field, from decreasing below safe operating levels. This prevents pole slip and possible machine damage. This action also limits the amount of vars being absorbed by the machine, based on user-defined settings. An internally-generated Underexcitation Limiting (UEL) curve based on a permissible var level at 0 kW can be utilized. Alternately, a five point UEL curve can be created to match specific generator characteristics. UEL action is optional in FCR mode.

Stator Current Limiter

The stator current limiter (SCL) senses the level of stator current and limits it to prevent stator overheating. The SCL operates in all modes except FCR and when the DECS-400 is off-line (52 J/K and

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52 L/M contact inputs are closed). In FCR mode, the DECS-400 provides indication that a stator overcurrent condition exists, but limiter action is inhibited.

Two SCL current levels are provided: high and low. The generator can operate continuously at the low SCL level, but only for a programmed time at the high SCL level.

Reactive Power Limiter

The var limiter accommodates applications where the prime mover (turbine) has been uprated but the generator ratings are unchanged. In this case, the generator power factor is increased and the generator is var limited. The var limiter is available for these applications to limit reactive power flow out of the generator to a safe level.

Autotracking Between DECS-400 Operating Modes

The DECS-400 can provide autotracking (automatic following) of the controlling mode by the noncontrolling modes. This allows the operator to initiate a controlled, bumpless transfer of the DECS-400 between operating modes with minimal disturbance to the power system. This feature can be used in conjunction with a set of protective relays to initiate a transfer to a backup mode of operation (such as FCR mode) upon the detection of a system failure or fault (such as loss of sensing).

Autotracking Between DECS-400 Units

The DECS-400 is also designed to automatically track a second DECS-400 unit using dedicated communication ports on the two units. A backup DECS-400 controller can be placed in service and programmed to track the control output of the primary DECS-400. In the unlikely event of a failure of the first DECS-400, protective relays can initiate a transfer of control from the first to the second DECS-400 with minimal system disturbance.

Protective Functions

Protective functions built into the DECS-400 may be used as a backup to the primary protection relays and can be assigned to as many as six programmable output contacts via BESTCOMS software. The protective functions offer fully adjustable tripping levels and time delays. DECS-400 protective functions

are listed below. Functions marked with an asterisk ( ) have dual setting groups.

•Field overcurrent

•Field overtemperature

•Field overvoltage

•Generator overvoltage

•Generator undervoltage

•Loss of field

•Loss of Field Isolation Module

•Loss of sensing voltage

•Microprocessor watchdog

•Open exciter diode (brushless application)

•Shorted exciter diode (brushless application)

•Volts per hertz protection

Programmable Logic

The DECS-400 utilizes programmable logic functionality in the form of multiplexors, AND gates, OR gates, NOT gates, and timer gates. Inputs to the logic are in the form of discrete information including switching inputs, system status data, protection status data, limiter status data, alarm status data, and PSS status data. The outputs of the programmable logic module can be used to control the relay outputs as well as various other functions inside the DECS-400 such as control functions (start/stop, mode select, etc.), protection functions (Field Overvoltage Enable, Field Overcurrent Enable, etc.), limiter functions (OEL enable, UEL enable, etc.), and PSS functions. BESTCOMS provides a tool for customizing the system control logic for specific applications.

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Metering

Two programmable, 4 to 20 mAdc, analog meter drivers are provided. The meter side is isolated from DECS-400 circuitry. Either driver can be programmed to meter a broad range of generator and system parameters.

Sequence of Events Recording

An integrated sequence of events recorder (SER) can be used to reconstruct the exact time of an event or disturbance. The DECS-400 monitors its contact inputs and outputs for changes of state, system operating changes, and alarm conditions. If any of these events occurs, the DECS-400 logs that event with a date and time stamp. The resulting event record allows the user to analyze a chain of events with accurate information regarding the sequence in which they occurred. Up to 127 events can be stored in DECS-400 volatile memory and those events are retrievable through BESTCOMS software.

Oscillography

The data recording feature can record up to six oscillographic records and store them in volatile memory. Up to six variables can be selected for monitoring. These variables include generator voltage, generator current (single-phase), frequency, kW, power factor, field voltage, and field current. Oscillographic records can be triggered through BESTCOMS or by a logic trigger or level trigger.

During commissioning, BESTCOMS can be used to trigger and save a record of a voltage step response. At the completion of commissioning, a logic trigger or level trigger can be used to activate the data recorder to capture the occurrence for review at a later time. DECS-400 alarms can also be used to start the data recorder. When an alarm condition occurs, an oscillographic record can be stored. A level trigger will initiate a record to be saved when a variable (such as field current) exceeds a predetermined setting. Oscillographic records are recorded in accordance with the IEEE Standard Common Format for Transient Data Exchange (COMTRADE) or log file format. Basler Electric provides BESTwave™, a COMTRADE viewer that enables viewing of oscillography records saved by the DECS-400.

Real-Time Monitoring

Real-time monitoring is possible for any of the parameters available for oscillography. The HMI real-time monitoring screen will display up to two parameters simultaneously. This data can be stored in a file for later reference.

Internal Testing Provisions

Using BESTCOMS, the user can configure and run both frequency and step response tests to facilitate commissioning or demonstrate system performance. The frequency response test has a frequency range of 0.1 to 10 hertz, and gain/phase information is generated in the form of a Bode plot. The DECS-400 also allows injection of test signals at various points in the PSS/voltage regulation loop for a high level of testing flexibility.

Communication

The DECS-400 is supplied with BESTCOMS software which makes DECS-400 programming and customization fast and easy. BESTCOMS includes a PID selection utility that provides a user-friendly format for selecting stability settings. BESTCOMS has monitoring screens for viewing all settings, metering screens for viewing all machine parameters, and control screens for remote control of the excitation system. A file converter within BESTCOMS enables conversion of DECS-300 settings files for use with the DECS-400.

An RS-485 port on the rear panel supports Modbus™ (floating point) communication protocol. Modbus™ is an open protocol, with all registers and operating instructions available in this instruction manual. This makes it simple for the user to develop custom communication software.

An Ethernet port on the rear panel enables communication with the DECS-400 over a TCP/IP network. Ethernet support in the DECS-400 enables remote access to DECS-400 settings and data through Modbus TCP or BESTCOMS. DECS-400 time synchronization with a network time server is also possible.

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An internal modem is also provided to remotely access DECS-400 settings and alarms.

Password Protection

All DECS-400 parameters can be viewed at the front panel display, through BESTCOMS, or through Modbus™ without the need of a password. If the user wishes to change a setting, the proper password must be entered to allow access to the parameter. Two levels of password protection exist. One level provides global access to all parameters. The other level provides limited access to parameters normally associated with operator control.

Upgrading from DECS-300 to DECS-400

The upgrading process was designed to be easy, but some additional wiring may be necessary. An escutcheon plate for easy installation is recommended (see the Installation chapter). To make the upgrade process easier, BESTCOMS software for the DECS-400 provides a tool to convert a DECS-300 settings file to a DECS-400 settings file (see the BESTCOMS Software chapter).

Model and Style Number

DECS-400 electrical characteristics and operational features are defined by a combination of letters and numbers that make up the style number. The model number, together with the style number, describe the options included in a specific device and appear on a label affixed to the rear panel.

Style Number

The style number identification chart in Figure 1 defines the electrical characteristics and operational features available in the DECS-400.

Figure 1. DECS-400 Style Chart

DECS-400

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Human-Machine Interface

This chapter describes the DECS-400 human-machine interface (HMI) and illustrates navigation of the menu tree accessed through the front panel and LCD.

Controls and Indicators

DECS-400 controls and indicators are illustrated in Figure 2 and described in Table 1. The locators and descriptions of Table 1 correspond to the locators shown in Figure 2.

		Figure 2. Controls and Indicators
		Table 1. Control and Indicator Descriptions
	Locator	Description
	A	Null Balance Indicator. This LED lights when the setpoint of the inactive operating
		modes (AVR, FCR, Var, or Power Factor) match the setpoint of the active mode.
	B	PSS Active Indicator. This LED lights when the integrated power system stabilizer is
		enabled and can generate a stabilizing signal in response to a power system
		disturbance.
	C	Pre-Position Indicator. This LED lights when the setpoint of the active operating mode is
		at either of the two pre-position setting levels.
	D	Lower Limit Indicator. This LED lights when the setpoint of the active operating mode is
		decreased to the lower setpoint limit.
	E	Upper Limit Indicator. This LED lights when the setpoint of the active operating mode is
		increased to the upper setpoint limit.
	F	Latch. Two lever-style latches (locators F and M) secure the DECS-400 draw-out
		assembly in its case. A captive Phillips screw in each latch can be tightened to lock the
		draw-out assembly in place.
	G	Communication Port. This RS-232 port has a female DB-9 connector for local
		communication with a PC operating BESTCOMS software (supplied with the DECS-
		400).

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	Locator	Description
	H	Reset Pushbutton. This button is pressed to reset DECS-400 alarms or cancel a
		settings editing session.
	I	Scrolling Pushbuttons. These four buttons are used to scroll up, down, left, and right
		through the menu tree displayed on the front panel display (locator K). During an editing
		session, the left and right scrolling pushbuttons select the variable to be changed and
		the up and down scrolling pushbuttons change the value of the variable.
	J	Edit Pushbutton. Pressing this button starts an editing session and enables changes to
		DECS-400 settings. When the Edit pushbutton is pressed to open an editing session,
		an LED on the button lights. At the conclusion of the editing session, the Edit
		pushbutton is pressed to save the setting changes and the LED turns off.
	K	Display. The display consists of a 128 by 64 pixel, liquid crystal display (LCD) with LED
		backlighting. It serves as a local source of information provided by the DECS-400 and is
		used when programming settings through the front panel. The LCD displays operations,
		setpoints, loop gains, metering, protection functions, system parameters, and general
		settings.
	L	Identification Label. The identification label contains information such as the model,
		style, and serial numbers and operating power and sensing current ratings.
	M	Latch. Two lever-style latches (locators F and M) secure the DECS-400 draw-out
		assembly in its case. A captive Phillips screw in each latch can be tightened to lock the
		draw-out assembly in place.

Menu System

The front panel menu system consists of a network of screens that enable the user to edit DECS-400 settings and view system parameters.

Menu Navigation

Movement through the front panel menu system is achieved by pressing the four, front-panel scrolling pushbuttons (locator I in Figure 2).

Navigation aids assist the user in moving from screen to screen and are provided at the top and bottom lines of each screen.

The top line of each screen contains the menu path which is similar to the path of a file on a PC. When the menu path exceeds the width of the LCD, the first part of the menu path is replaced with two periods (..) so that the last part of the path remains visible.

The bottom line indicates which menu screens can be accessed from the current screen by using the left, lower, or right scrolling pushbuttons. The screens accessed by the left, lower, and right scrolling pushbuttons are indicated by a <, v, and > symbol followed by an abbreviated menu name.

The front panel Reset pushbutton (locator H in Figure 2) provides a shortcut to the metering screen when a settings editing session is not in progress.

Menu Structure

The front panel menu system has nine branches:

1.Operating. Start/stop, mode, and pre-position setpoint status.

2.Setpoints. Mode setting values such as AVR, FCR, droop, var, and power factor.

3.Loop Gains. PID settings.

4.Metering. Real-time metering of user-selected parameters and alarm messages.

5.Protection. Protective Function setting parameters.

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6.Limiters. System limiters such as overexcitation and underexcitation.

7.PSS. The power system stabilizer menu consists of four sub-menus which include Control, Parameters, Limiters, and Configuration.

8.System Parameters. The system parameters menu consists of nine sub-menus which include Generator Data, Field Data, Transformers, Configuration, Output Contacts, Traverse Rates, Preposition Modes, Startup, and Tracking.

9.General Settings. The general settings menu consists of three sub-menus which include Communications, LCD Contrast, and Real-Time Clock.

From the DECS-400 title screen, the Operating menu branch is accessed first by pressing the Down pushbutton. Then, the remaining branches are accessed by pressing the left or right scrolling pushbuttons.

A detailed list of the menu system screens is provided below. The menu paths appear on the left and the settings appear on the right.

\D400\OPER	OPERATING
\OPERATE_1	START/STOP
AVR/MANUAL
PF OR VAR
FCR OR FVR
PREPOSN 1
PREPOSN 2
\OPERATE_2	VOLT MATCH
INT TRACK
EXT TRACK
CROSS CURNT
LINE DROP
DROOP
\OPERATE_3	INNER LP

\D400\SETPT	SETPOINTS
\MODE_SET1	AVR MODE
FCR MODE
DROOP
VAR MODE
PF MODE
FVR MODE
\MODE1\RANGE_1	FINE V BD
AVR MIN
AVR MAX
FCR MIN
FCR MAX
KW LVL TRNS
\MODE1\RANGE_2	MIN VAR OUT
MAX VARA OUT
MAX LAG PF
MAX LEAD PF
FVR MIN
FVR MAX
\MODE1\RANGE_3	V MATCH BD
V MATCH REF
\MODE_SET2	LINE DROP
\PREP_SET1	AVR MODE

FCR MODE

VAR MODE

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PF MODE
FVR MODE
\PREP_SET2	AVR MODE
FCR MODE
VAR MODE
PF MODE
FVR MODE
\D400\GAIN	LOOP GAINS
\P_AVR_GAINS	PRI STB RG
AVR Kp
AVR Ki
AVR Kd
AVR Td
AVR Kg
\AVRG1\S_AVR_GAINS	SEC STB RG
AVR Kp
AVR Ki
AVR Kd
AVR Td
AVR Kg
\P_FCR_GAINS	FCR Kp
FCR Ki
FCR Kd
FCR Td
FCR Kg
\P_FVR_GAINS	FVR Kp
FVR Ki
FVR Kd
FVR Td
FVR Kg
\LIM_GAINS	OEL Ki
OEL Kg
UEL Ki
UEL Kg
SCL Ki
SCL Kg
\LIMGN\\LIM_GAINS2	VARL Ki
VARL Kg
\CTL_GAINS	PF Ki
PF Kg
VAR Ki
VAR Kg
V MATCH Kg
\IN_LP_GAINS	INNER LP Ki
INNER LP Kg
\D400_METERING	METERING

See Metering Screen, Metering Values for a list of the parameters available for display.

\D400_PROT	PROTECTION
\V/HZ_PROT1	V/HZ ENABLE
V/HZ PCKUP
TIME DIAL
RESET DIAL
DLAY1 PKUP
DLAY1 TIME
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\V/HZ_PROT2	DLAY2 PKUP
DLAY2 TIME
CURVE EXP
\PROT_ENAB1	FIELD OV
FIELD OC
STATOR OV
STATOR UV
NO SENSING
NO SNS->MAN
\ENAB1\S_PROT_ENE	FIELD OV
FIELD OC
STATOR OV
STATOR UV
FIELD OT
LOSS FIELD
\PROT_ENAB2	FIELD OT
LOSS FIELD
FIT FAILED
POWER LOW
EX DIOD OD
EX DIOD SD
\P_PROT_LVL1	FIELD OV
FIELD OC
STATOR OV
STATOR UV
FIELD OT
LOS BAL V
\P_PROT_LVL1	FIELD OV
FIELD OC
STATOR OV
STATOR UV
FIELD OT
LOSS FIELD
\P_PROT_LVL2	LOS IMBAL V
LOSS FIELD
EDM OD RPL
EDM SD RPL
EDM INH LVL
\P_PROT_TMR1	FIELD OV
FIELD OC TD
STATOR OV
STATOR UV
NO SENSING
FIELD OT
\P_TM1\S_PROT_TMR1	FIELD OV
FIELD OC TD
STATOR OV
STATOR UV
FIELD OT
LOSS FIELD
\P_PROT_TMR2	LOSS FIELD
FIT FAILED
EX DIOD OD
EX DIOD SD

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\D400\LIMIT	LIMITERS
\OPTION_1	OEL STYLE
OEL OPTION
UEL STYLE
OEL GROUP
UEL GROUP
SCL GROUP
\OPTION_2	UF OR V/HZ
OEL ENABLE
UEL ENABLE
SCL ENABLE
UEL FLTR TC
UEL VOL EXP
\P_ONLINE	INST LIMIT
INST TIME
MED LIMIT
MED TIME
CONT LIMIT
\P_ONL\S_ONLINE	INST LIMIT
INST TIME
MED LIMIT
MED TIME
CONT LIMIT
\P_OFFLINE	OEL HI LIM
HI LIM TIME
OEL LO LIM
\P_OFL\S_OFFLINE	OEL HI LIM
HI LIM TIME
OEL LO LIM
\P_OFFTAKOVR	OEL MAX CUR
OEL MIN CUR
OEL TD
\P_OFT\S_OFFTAKOVR	OEL MAX CUR
OEL MIN CUR
OEL TD
\P_ONTAKOVR	OEL MAX CUR
OEL MIN CUR
OEL TD
\P_ONT\S_ONTAKOVR	OEL MAX CUR
OEL MIN CUR
OEL TD
\P_UEL_CRV_X	PNT 1 WATTS
PNT 2 WATTS
PNT 3 WATTS
PNT 4 WATTS
PNT 5 WATTS
\P_UEX\S_UEL_CRV_X	PNT 1 WATTS
PNT 2 WATTS
PNT 3 WATTS
PNT 4 WATTS
PNT 5 WATTS
\P_UEL_CRV_Y	PNT 1 VARS
PNT 2 VARS
PNT 3 VARS
PNT 4 VARS
PNT 5 VARS
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\S_UEL_CRV_Y	PNT 1 VARS
PNT 2 VARS
PNT 3 VARS
PNT 4 VARS
PNT 5 VARS
\P_SCLIM	SCL HI LIM
HI LIM TIME
SCL LO LIM
INIT DELAY
\P_SCL\S_SCLIM	SCL HI LIM
HI LIM TIME
SCL LO LIM
INIT DELAY
\VARLM	VARL ENABLE
PRI SETPOINT
PRI INITDLY
SEC SETPNT
SEC INITDLY
VARL GROUP
\UF_V/HZ	CORNER FREQ
UF SLOPE
V/HZ HI
V/HZ LO
V/HZ TIME
\D400\PSS	POWER SYSTEM STABILIZER
\CONTROL	PSS CONTROL
\P_BASIC_CTL	SETTING GRP
TM PWRN TLD
TM PWR HYST
\P_CTL\S_BASIC_CTL	SECONDARY
TM PWRN TLD
TM PWR HYST
\P_SOFT_SW1	SSW 0
SSW 1
SSW 2
SSW 3
SSW 4
SSW 5
\P_SS1\S_SOFT_SW2	SSW 0
SSW 1
SSW 2
SSW 3
SSW 4
SSW 5
\P_SOFT_SW2	SSW 6
SSW 7
SSW 8
SSW 9
SSW 10
\P_SS2\S_SOFT_SW2	SSW 6
SSW 7
SSW 8
SSW 9
SSW 10

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\D400\PSS\PARAMETER	PSS PARAMETERS
\P_FILTER1	QUADTURE XQ
SCALER KPE
LP FLTR T11
LP FLTR T12
LP FLTR T13
RT FLTR TR
\P_FTR\S_FILTER	QUADTURE XQ
SCALER KPE
LP FLTR T11
LP FLTR T12
LP FLTR T13
RT FLTR TR
\P_FILTER2	HP FLTR H
HP FLTR TW1
HP FLTR TW2
HP FLTR TW3
HP FLTR TW4
\P_FTR\S_FILTER2	HP FLTR H
HP FLTR TW1
HP FLTR TW2
HP FLTR TW3
HP FLTR TW4
\P_FILTER3	NUM EXP N
NUM EXP M
\P_FTR\S_FILTER3	SECONDARY FILTER 3
NUM EXP N
NUM EXP M
\P_TRSN_FLTR	FILTER 1 ZN
FILTER 1 ZD
FILTER 1 WN
FILTER 2 ZN
FILTER 2 ZD
FILTER 2 WN
\P_TSN\S_TRSN_FLTR	FILTER 1 ZN
FILTER 1 ZD
FILTER 1 WN
FILTER 2 ZN
FILTER 2 ZD
FILTER 2 WN
\P_PHSE_COMP1	PHASE 1 TLD
PHASE 1 TLG
PHASE 2 TLD
PHASE 2 TLG
\S_PHSE_COMP1	PHASE 1 TLD
PHASE 1 TLG
PHASE 2 TLD
PHASE 2 TLG
\P_PHSE_COMP2	PHASE 3 TLD
PHASE 3 TLG
PHASE 4 TLD
PHASE 4 TLG
\S_PHSE_COMP2	PHASE 3 TLD
PHASE 3 TLG
PHASE 4 TLD
PHASE 4 TLG
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\D400\PSS\LIMTERS	PSS LIMITERS
\P_OUTPUT_LMT	UPPER LIMIT
LOWER LIMIT
GAIN
\S_OUTPUT_LMT	UPPER LIMIT
LOWER LIMIT
GAIN
\P_VOLT_LIMIT	TIME CONST
SETPOINT
\P_VLT\S_VOLT_LMT	TIME CONST
SETPOINT
\P_LOGIC_LMT	FLTR NRM TM
FLTR LMT TM
OUT UPR LMT
OUT LWR LMT
OUT TM DLY
\P_LOG\S_LOGIC_LMT	FLTR NRM TM
FLTR LMT TM
OUT UPR LMT
OUT LWR LMT
OUT TM DLY
\D400\PSS\CONFIG	PSS CONFIGURATION
\CNFG SET GP	SETTING GROUP CONFIGURATION
PWR TLD ENA
SG PWR TLD
ST PWR HYST
\PSS_ROC	ROC ENABLE
ROC THRESH
ROC TM DLY
ROC BLKTIM
ROC LPF TC
ROC WF TC
\D400\SYSTEM	SYSTEM PARAMETERS
\GENERATOR	GENERATOR DATA
\GEN\GEN_DATA	RATED VOLT
FREQUENCY
RATED KVA
\FIELD_DATA	FIELD DATA
\FIELD_DATA1	FIELD VOLT
FIELD CURR
SHUNT RATING
ISOL BOX IN
FIELD RES
AMB TEMP
\FIELD_DATA_2	BRUSH DROP
POLE RATIO
\TRNSFRMRS	TRANSFORMERS
\XFMRS\XFMR_DATA	GEN PT PRI
GEN PT SEC
BUS PT PRI
BUS PT SEC
GEN CT PRI
GEN CT SEC

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\CONFIGURE	CONFIGURATION
\CONFG\CNFG_DATA_1	FIELD TYPE
VLTAGE SNSE
MOTOR MODE
CURRNT SNSE
CT SELECT
\CNFG\CNFG_DATA_2	CTRL SIGNAL
AUX IN TYPE
AUX IN FCTN
CRSS I GAIN
TEMP MODE
\AUX_GAINS	AVR MODE
FCR MODE
VAR MODE
PF MODE
FVR MODE
INNER/OUTER
\CONTACTS	OUTPUT CONTACTS
\CNTCT\RELAY_1	OUTPT SENSE
OUTPUT TYPE
MOMENT TIME
\CNTCT\RELAY_2	OUTPT SENSE
OUTPUT TYPE
MOMENT TIME
\CNTCT\RELAY_3	OUTPT SENSE
OUTPUT TYPE
MOMENT TIME
\CNTCT\RELAY_4	OUTPT SENSE
OUTPT TYPE
MOMENT TIME
\CNTCT\RELAY_5	OUTPT SENSE
OUTPT TYPE
MOMENT TIME
\CNTCT\RELAY_6	OUTPT SENSE
OUTPT TYPE
MOMENT TIME
\TRVRS_HEAD	TRAVERSE RATES
\TRVRS\TRVRS_RATE	AVR MODE
FCR MODE
VAR MODE
PF MODE
FVR MODE
\PMODE_HEAD	PRE-POSITION MODES
\PMODE\PREP_MODE1	AVR MODE
FCR MODE
VAR MODE
PF MODE
FVR MODE
\PREP1_RATES1	AVR TRAVEL
AVR RATE
FCR TRAVEL
FCR RATE
VAR TRAVEL
VAR RATE
\PREP1_RATES2	PF TRAVEL
PF RATE
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