Sel 751a User manual

20100129

SEL-751A

Feeder Protection Relay

Instruction Manual

*PM751A-01-NB*

SEL-751A Relay Instruction Manual Date Code 20100129

The relay contains devices sensitive to Electrostatic Discharge (ESD).

When working on the relay with the front panel removed, work

surfaces and personnel must be properly grounded or equipment

damage may result.

CAUTION

Le relais contient des pièces sensibles aux décharges

électrostatiques. Quand on travaille sur le relais avec les panneaux

avant ou du dessus enlevés, toutes les surfaces et le personnel

doivent être mis à la terre convenablement pour éviter les

dommages à l’équipement.

ATTENTION

Equipment components are sensitive to electrostatic discharge (ESD).

Undetectable permanent damage can result if you do not use proper ESD

procedures. Ground yourself, your work surface, and this equipment before

removing any cover from this equipment. If your facility is not equipped to

work with these components, contact SEL about returning this device and

related SEL equipment for service.

CAUTION

Les composants de cet équipement sont sensibles aux décharges

électrostatiques (DES). Des dommages permanents non-décelables

peuvent résulter de l’absence de précautions contre les DES. Raccordez-

vous correctement à la terre, ainsi que la surface de travail et l’appareil

avant d’en retirer un panneau. Si vous n’êtes pas équipés pour travailler

avec ce type de composants, contacter SEL afin de retourner l’appareil

pour un service en usine.

ATTENTION

There is danger of explosion if the battery is incorrectly replaced.

Replace only with Ray-O-Vac®no. BR2335 or equivalent

recommended by manufacturer. Dispose of used batteries according

to the manufacturer’s instructions.

CAUTION

There is danger of explosion if the battery is incorrectly replaced.

Replace only with Ray-O-Vac®no. BR2335 or equivalent

recommended by manufacturer. Dispose of used batteries according

to the manufacturer’s instructions.

CAUTION

Il y a un danger d’explosion si la pile électrique n’est pas

correctement remplacée. Utiliser exclusivement Ray-O-Vac®No.

BR2335 ou un équivalent recommandé par le fabricant. Se

débarrasser des piles usagées suivant les instructions du fabricant.

ATTENTION

Class 1 LASER Product. This product uses visible or invisible LASERs based

on model option. Looking into optical connections, fiber ends,

or bulkhead connections can result in hazardous radiation exposure.

CAUTION

ATTENTION

Produit LASER de Classe 1. Ce produit utilise des LASERS visibles ou

invisibles dépendant des options du modèle. Regarder vers les connecteurs

optiques, les extrémités des fibres oules connecteurs de cloison peut

entraîner une exposition à des rayonnements dangereux.

Use of controls or adjustments, or performance of procedures other than

those specified herein may result in hazardous radiation exposure.

CAUTION

ATTENTION

L’utilisation de commandes ou de réglages, ou l’application de tests de

fonctionnement différents de ceux décrits ci-après peuvent entraîner

l’exposition à des radiations dangereuses.

Have only qualified personnel service this equipment. If you are not

qualified to service this equipment, you can injure yourself or others,

or cause equipment damage.

WARNING

Seules des personnes qualifiées peuvent travailler sur cet appareil. Si vous

n’êtes pas qualifiés pour ce travail, vous pourriez vous blesser avec d’autres

personnes ou endommager l’équipement.

AVERTISSEMENT

Use of this equipment in a manner other than specified in this manual can

impair operator safety safeguards provided by this equipment.

WARNING

L’utilisation de cet appareil suivant des procédures différentes de celles

indiquées dans ce manuel peut désarmer les dispositifs de protection

d’opérateur normalement actifs sur cet équipement.

AVERTISSEMENT

To install an option card, the relay must be de-energized and then

reenergized. When reenergized, the relay will reboot. Therefore, de-energize

the protected equipment before installing the option card to prevent

damage to the equipment.

WARNING

Pour installer une carte à option, le relais doit être éteint et ensuite

rallumé. Quand il est rallumé, le relais redémarrera. Donc, il faut éteindre

l’équipementprotégé avant d’installer la carte à option pour empêcher des

dégats à l’équipement.

AVERTISSEMENT

This device is shipped with default passwords. Default passwords should be

changed to private passwords at installation. Failure to change each default

password to a private password may allow unauthorized access. SEL shall

not be responsible for any damage resulting from unauthorized access.

WARNING

Cet appareil est expédié avec des mots de passe par défaut. A l’installation,

les mots de passe par défaut devront être changés pour des mots de passe

confidentiels. Dans le cas contraire, un accés non-autorisé á l’équipement

peut être possible. SEL décline toute responsabilité pour tout dommage

résultant de cet accés non-autorisé.

AVERTISSEMENT

Disconnect or de-energize all external connections before opening this

device. Contact with hazardous voltages and currents inside this device can

cause electrical shock resulting in injury or death.

DANGER

Débrancher tous les raccordements externes avant d’ouvrir cet appareil.

Tout contact avec des tensions ou courants internes à l’appareil peut causer

un choc électrique pouvant entraîner des blessures ou la mort.

DANGER

Contact with instrument terminals can cause electrical shock

that can result in injury or death.

DANGER

Tout contact avec les bornes de l’appareil peut causer un choc

électrique pouvant entraîner des blessuers ou la mort.

DANGER

All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. No SEL trademarks may

be used without written permission. SEL products appearing in this document may be covered by US and Foreign patents.

Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in its

products, including without limitation software, firmware, and documentation.

The information in this manual is provided for informational use only and is subject to change without notice. Schweitzer Engineering Laboratories,

Inc. has approved only the English language manual.

This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service

representative. PM751A-01

Date Code 20100129 Instruction Manual SEL-751A Relay

Table of Contents

R.Instruct ion Manual

List of Tables .......................................................................................................................................................... v

List of Figures....................................................................................................................................................... xi

Preface....................................................................................................................................................................iii

Manual Overview ..............................................................................................................................................iii

Conventions....................................................................................................................................................... iv

Safety and General Information ......................................................................................................................... v

Section 1: Introduction and Specifications

Overview ....................................................................................................................................................... 1.11

Features.......................................................................................................................................................... 1.11

Models, Options, and Accessories................................................................................................................. 1.12

Applications................................................................................................................................................... 1.15

Getting Started............................................................................................................................................... 1.16

Specifications ................................................................................................................................................ 1.20

Section 2: Installation

Overview ......................................................................................................................................................... 2.1

Relay Placement .............................................................................................................................................. 2.1

I/O Configuration ............................................................................................................................................ 2.2

Rear-Panel Connections ................................................................................................................................ 2.15

AC/DC Control Connection Diagrams.......................................................................................................... 2.20

Arc-Flash Protection: System Installation..................................................................................................... 2.29

Field Serviceability........................................................................................................................................ 2.35

Section 3: PC Software

Overview ......................................................................................................................................................... 3.1

Setup................................................................................................................................................................ 3.2

Terminal........................................................................................................................................................... 3.4

Settings Database Management and Drivers ................................................................................................... 3.5

Settings ............................................................................................................................................................ 3.6

Event Analysis............................................................................................................................................... 3.11

Meter and Control.......................................................................................................................................... 3.12

Help ............................................................................................................................................................... 3.15

Section 4: Protection and Logic Functions

Overview ......................................................................................................................................................... 4.1

Application Data.............................................................................................................................................. 4.3

Group Settings (SET Command)..................................................................................................................... 4.3

Basic Protection............................................................................................................................................... 4.5

RTD-Based Protection................................................................................................................................... 4.27

Voltage-Based Protection .............................................................................................................................. 4.29

Frequency Protection..................................................................................................................................... 4.47

Rate-of-Change of Frequency Protection ...................................................................................................... 4.48

Trip/Close Logic............................................................................................................................................ 4.50

Reclose Supervision Logic ............................................................................................................................ 4.54

Reclose Logic ................................................................................................................................................ 4.59

Demand Metering.......................................................................................................................................... 4.76

Logic Settings (SET L Command)................................................................................................................ 4.81

Global Settings (SET G Command) .............................................................................................................. 4.92

Synchrophasor Measurement ........................................................................................................................ 4.94

Breaker Failure Setting.................................................................................................................................. 4.94

Arc-Flash Protection...................................................................................................................................... 4.95

Analog Inputs .............................................................................................................................................. 4.100

SEL-751A Relay Instruction Manual Date Code 20100129

Table of Contents

Analog Outputs............................................................................................................................................ 4.104

Station DC Battery Monitor ........................................................................................................................ 4.105

Breaker Monitor .......................................................................................................................................... 4.105

Digital Input Debounce ............................................................................................................................... 4.105

Data Reset.................................................................................................................................................... 4.107

Access Control............................................................................................................................................. 4.107

Time Synchronization Source ..................................................................................................................... 4.108

Port Settings (SET P Command)................................................................................................................. 4.108

Front-Panel Settings (SET F Command)..................................................................................................... 4.112

Report Settings (SET R Command) ............................................................................................................ 4.122

DNP Map Settings (Set DNP n command, n = 1, 2, or 3)........................................................................... 4.124

Modbus Map Settings (SET M Command)................................................................................................. 4.125

Section 5: Metering and Monitoring

Overview ......................................................................................................................................................... 5.1

Power Measurement Conventions ................................................................................................................... 5.2

Metering .......................................................................................................................................................... 5.2

Load Profiling................................................................................................................................................ 5.11

Station DC Battery Monitor .......................................................................................................................... 5.11

Breaker Monitor ............................................................................................................................................ 5.15

Section 6: Settings

Overview ......................................................................................................................................................... 6.1

View/Change Settings With Front Panel ......................................................................................................... 6.2

View/Change Settings Over Communications Port......................................................................................... 6.4

Setting Entry Error Messages.......................................................................................................................... 6.5

SEL-751A Settings Sheets

Section 7: Communications

Overview ......................................................................................................................................................... 7.1

Communications Interfaces ............................................................................................................................. 7.1

Communications Protocols............................................................................................................................ 7.11

SEL ASCII Protocol and Commands............................................................................................................ 7.13

Section 8: Front-Panel Operations

Overview ......................................................................................................................................................... 8.1

Front-Panel Layout.......................................................................................................................................... 8.1

Human-Machine Interface............................................................................................................................... 8.2

Operation and Target LEDs........................................................................................................................... 8.12

Section 9: Analyzing Events

Overview ......................................................................................................................................................... 9.1

Event Reporting............................................................................................................................................... 9.2

Sequential Events Recorder (SER) Report.................................................................................................... 9.15

Section 10: Testing and Troubleshooting

Overview ....................................................................................................................................................... 10.1

Testing Tools.................................................................................................................................................. 10.1

Commissioning Tests..................................................................................................................................... 10.2

Periodic Tests (Routine Maintenance)......................................................................................................... 10.11

Self-Test....................................................................................................................................................... 10.12

Troubleshooting........................................................................................................................................... 10.14

Factory Assistance....................................................................................................................................... 10.15

Appendix A: Firmware and Manual Versions

Firmware......................................................................................................................................................... A.1

Instruction Manual.......................................................................................................................................... A.4

iii

Date Code 20100129 Instruction Manual SEL-751A Relay

Table of Contents

Appendix B: Firmware Upgrade Instructions

Overview .........................................................................................................................................................B.1

Upgrade Instructions .......................................................................................................................................B.1

Appendix C: SEL Communications Processors

SEL Communications Protocols......................................................................................................................C.1

SEL Communications Processor .....................................................................................................................C.3

SEL Communications Processor and Relay Architecture ...............................................................................C.5

SEL Communications Processor Example......................................................................................................C.7

Appendix D: DNP3 Communications

Overview ........................................................................................................................................................ D.1

Introduction to DNP3 ..................................................................................................................................... D.1

DNP3 in the SEL-751A.................................................................................................................................. D.6

DNP3 Documentation .................................................................................................................................. D.20

Appendix E: Modbus RTU Communications

Overview .........................................................................................................................................................E.1

Communications Protocol ...............................................................................................................................E.2

Modbus Register Map ...................................................................................................................................E.26

Appendix F: IEC 61850 Communications

Features............................................................................................................................................................ F.1

Introduction to IEC 61850............................................................................................................................... F.2

IEC 61850 Operation....................................................................................................................................... F.3

IEC 61850 Configuration .............................................................................................................................. F.10

Logical Node Extensions............................................................................................................................... F.16

Logical Nodes................................................................................................................................................ F.18

Protocol Implementation Conformance Statement ....................................................................................... F.25

ACSI Conformance Statements..................................................................................................................... F.31

Appendix G: DeviceNet Communications

Overview ........................................................................................................................................................ G.1

DeviceNet Card .............................................................................................................................................. G.1

Features........................................................................................................................................................... G.2

Electronic Data Sheet ..................................................................................................................................... G.3

Appendix H: Synchrophasors

Overview ........................................................................................................................................................ H.1

Synchrophasor Measurement ......................................................................................................................... H.2

Settings for Synchrophasors........................................................................................................................... H.4

Synchrophasor Relay Word Bits..................................................................................................................... H.8

View Synchrophasors Using the MET PM Command................................................................................... H.9

C37.118 Synchrophasor Protocol................................................................................................................. H.10

Appendix I: MIRRORED BITS Communications

Overview ..........................................................................................................................................................I.1

Operation ..........................................................................................................................................................I.1

Settings .............................................................................................................................................................I.5

Appendix J: Relay Word Bits

Overview ..........................................................................................................................................................J.1

Definitions ........................................................................................................................................................J.4

Appendix K: Analog Quantities

Glossary

Index

SEL-751A Relay Command Summary

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Date Code 20100129 Instruction Manual SEL-751A Relay

List of Tables

R.Instruct ion Manual Table 1.1 Voltage Input Options........................................................................................................... 1.13

Table 1.2 SEL-751A Serial Port Settings............................................................................................. 1.17

Table 2.1 Communication Ports............................................................................................................. 2.4

Table 2.2 Communication Card Interfaces and Connectors................................................................... 2.5

Table 2.3 3 AVI Voltage Card Terminal Designation............................................................................. 2.5

Table 2.4 5 AVI Voltage Card Terminal Designation............................................................................. 2.6

Table 2.5 3 AVI/4 AFDI Voltage Card With Arc-Flash Detection Inputs Terminal Designation.......... 2.6

Table 2.6 Current Card Terminal Designation .......................................................................................2.7

Table 2.7 Eight Analog Input (8 AI) Card Terminal Allocation ............................................................ 2.7

Table 2.8 Four Analog Input/Four Analog Output (4 AI/4 AO) Card Terminal Allocation .................. 2.7

Table 2.9 I/O (3 DI/4 DO/1 AO) Card Terminal Allocation .................................................................. 2.8

Table 2.10 RTD (10 RTD) Card Terminal Allocation.............................................................................. 2.8

Table 2.11 Four Digital Input/Four Digital Output (4 DI/4 DO) Card Terminal Allocation ................... 2.9

Table 2.12 Eight Digital Input (8 DI) Card Terminal Allocation............................................................. 2.9

Table 2.13 Jumper Functions and Default Positions.............................................................................. 2.13

Table 3.1 SEL Software Solutions ......................................................................................................... 3.1

Table 3.2 ACSELERATOR QuickSet SEL-5030 Software....................................................................... 3.1

Table 3.3 File/Tools Menus.................................................................................................................... 3.7

Table 3.4 Help ...................................................................................................................................... 3.15

Table 4.1 Identifier Settings ................................................................................................................... 4.3

Table 4.2 CT Configuration Settings ..................................................................................................... 4.3

Table 4.3 Voltage Configuration Settings .............................................................................................. 4.4

Table 4.4 Maximum Phase Overcurrent Settings................................................................................... 4.5

Table 4.5 Neutral Overcurrent Settings.................................................................................................. 4.6

Table 4.6 Residual Overcurrent Settings................................................................................................ 4.8

Table 4.7 Negative-Sequence Overcurrent Settings............................................................................... 4.9

Table 4.8 Phase A, B, and C Time-Overcurrent Settings..................................................................... 4.10

Table 4.9 Maximum Phase Time-Overcurrent..................................................................................... 4.11

Table 4.10 Negative-Sequence Time-Overcurrent Settings ................................................................... 4.12

Table 4.11 Neutral Time-Overcurrent Settings ......................................................................................4.13

Table 4.12 Residual Time-Overcurrent Settings .................................................................................... 4.14

Table 4.13 Equations Associated With U.S. Curves .............................................................................. 4.16

Table 4.14 Equations Associated With IEC Curves............................................................................... 4.16

Table 4.15 RTD Settings ........................................................................................................................ 4.27

Table 4.16 RTD Resistance versus Temperature.................................................................................... 4.28

Table 4.17 Undervoltage Settings .......................................................................................................... 4.29

Table 4.18 Overvoltage Settings ............................................................................................................ 4.30

Table 4.19 Synchronism-Check Settings ............................................................................................... 4.35

Table 4.20 Power Element Settings........................................................................................................ 4.43

Table 4.21 Power Factor Settings........................................................................................................... 4.45

Table 4.22 Frequency Settings ............................................................................................................... 4.47

Table 4.23 Rate-of-Change-of-Frequency Settings................................................................................ 4.48

Table 4.24 Time Window Versus 81RnTP Setting................................................................................. 4.50

Table 4.25 Trip/Close Logic Settings..................................................................................................... 4.50

Table 4.26 Relay Word Bit and Front-Panel Correspondence to Reclosing Relay States ..................... 4.60

Table 4.27 Reclosing Control Settings................................................................................................... 4.63

Table 4.28 Shot Counter Correspondence to Relay Word Bits and Open Interval Times ..................... 4.66

Table 4.30 Demand Meter Settings........................................................................................................ 4.76

Table 4.31 Enable Settings..................................................................................................................... 4.81

Table 4.32 Latch Bits Equation Settings ................................................................................................ 4.82

Table 4.33 SELOGIC Control Equation Operators (Listed in Operator Precedence) ............................. 4.84

Table 4.34 Other SELOGIC Control Equation Operators/Values............................................................ 4.87

Table 4.35 SELOGIC Variable Settings................................................................................................... 4.88

Table 4.36 Counter Input/Output Description........................................................................................ 4.89

SEL-751A Relay Instruction Manual Date Code 20100129

List of Tables

Table 4.37 Order of Precedence of the Control Inputs........................................................................... 4.89

Table 4.38 Control Output Equations and Contact Behavior Settings................................................... 4.91

Table 4.39 General Global Settings ....................................................................................................... 4.92

Table 4.40 Event Messenger Settings .................................................................................................... 4.92

Table 4.41 Setting Group Selection ....................................................................................................... 4.94

Table 4.42 Breaker Failure Setting......................................................................................................... 4.94

Table 4.43 Arc-Flash Overcurrent Settings............................................................................................ 4.95

Table 4.44 Arc-Flash Time-Overlight Settings ......................................................................................4.97

Table 4.45 Typical Ambient Illumination Light Levels......................................................................... 4.98

Table 4.46 Summary of Steps .............................................................................................................. 4.101

Table 4.47 Analog Input Card in Slot 3 ............................................................................................... 4.103

Table 4.48 Output Setting for a Card in Slot 3.....................................................................................4.104

Table 4.49 Slot C Input Debounce Settings .........................................................................................4.107

Table 4.50 Setting Change Disable Setting.......................................................................................... 4.108

Table 4.51 Time Synchronization Source Setting................................................................................ 4.108

Table 4.52 Front-Panel Serial Port Settings ......................................................................................... 4.108

Table 4.53 Ethernet Port Settings......................................................................................................... 4.109

Table 4.54 Fiber-Optic Serial Port Settings ......................................................................................... 4.110

Table 4.55 Rear-Panel Serial Port (EIA-232) Settings......................................................................... 4.110

Table 4.56 Rear-Panel Serial Port (EIA-232/EIA-485) Settings.......................................................... 4.110

Table 4.57 Rear-Panel DeviceNet Port Settings................................................................................... 4.112

Table 4.58 Display Point and Local Bit Default Settings .................................................................... 4.112

Table 4.59 LCD Display Settings......................................................................................................... 4.112

Table 4.60 Settings That Always, Never, or Conditionally Hide a Display Point ............................... 4.113

Table 4.61 Entries for the Four Strings ................................................................................................ 4.114

Table 4.62 Binary Entry in the Name String Only............................................................................... 4.116

Table 4.63 Analog Entry in the Name String Only.............................................................................. 4.116

Table 4.64 Entry in the Name String and the Alias Strings ................................................................. 4.117

Table 4.65 Example Settings and Displays ..........................................................................................4.118

Table 4.66 Target LED Settings ........................................................................................................... 4.121

Table 4.67 Pushbutton LED Settings ................................................................................................... 4.121

Table 4.68 Auto-Removal Settings ...................................................................................................... 4.122

Table 4.69 SER Trigger Settings.......................................................................................................... 4.123

Table 4.70 Enable Alias Settings ......................................................................................................... 4.123

Table 4.71 SET R SER Alias Settings ................................................................................................. 4.123

Table 4.72 Event Report Settings......................................................................................................... 4.124

Table 4.73 Load Profile Settings.......................................................................................................... 4.124

Table 4.74 DNP Map Settings.............................................................................................................. 4.124

Table 4.75 User Map Register Settings ............................................................................................... 4.125

Table 5.1 Measured Fundamental Meter Values .................................................................................... 5.3

Table 5.2 Thermal Meter Values ............................................................................................................ 5.4

Table 5.3 RTD Input Status Messages ................................................................................................... 5.5

Table 5.4 Maximum/Minimum Meter Values........................................................................................ 5.6

Table 5.5 RMS Meter Values ................................................................................................................. 5.8

Table 5.6 Demand Values....................................................................................................................... 5.9

Table 5.7 Synchrophasor Measured Values ......................................................................................... 5.10

Table 5.8 Station DC Battery Monitor Settings ................................................................................... 5.12

Table 5.9 Breaker Maintenance Information for a 25 kV Circuit Breaker .......................................... 5.16

Table 5.10 Breaker Monitor Settings ..................................................................................................... 5.16

Table 6.1 Methods of Accessing Settings .............................................................................................. 6.1

Table 6.2 SHOW Command Options..................................................................................................... 6.4

Table 6.3 SET Command Options ......................................................................................................... 6.4

Table 6.4 SET Command Editing Keystrokes........................................................................................ 6.5

Table 6.5 SET Command Format........................................................................................................... 6.5

Table 7.1 SEL-751A Communications Port Interfaces.......................................................................... 7.1

Table 7.2 EIA-232/EIA-485 Serial Port Pin Functions ......................................................................... 7.8

Table 7.3 Protocols Supported on the Various Ports ............................................................................ 7.11

Table 7.4 Serial Port Automatic Messages ..........................................................................................7.14

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Date Code 20100129 Instruction Manual SEL-751A Relay

List of Tables

Table 7.5 Command Response Header Definitions ............................................................................. 7.16

Table 7.6 Access Commands ............................................................................................................... 7.17

Table 7.7 ANALOG Command ........................................................................................................... 7.19

Table 7.8 ANALOG Command Format............................................................................................... 7.19

Table 7.9 COM Command ................................................................................................................... 7.23

Table 7.10 CONTROL Command ......................................................................................................... 7.23

Table 7.11 Three Remote Bit States....................................................................................................... 7.23

Table 7.12 COPY Command.................................................................................................................. 7.24

Table 7.13 COUNTER Command ......................................................................................................... 7.24

Table 7.14 Date Command..................................................................................................................... 7.24

Table 7.15 EVENT Command (Event Reports)..................................................................................... 7.25

Table 7.16 EVENT Command Format...................................................................................................7.25

Table 7.17 FILE Command.................................................................................................................... 7.26

Table 7.18 GOOSE Command Variants.................................................................................................7.26

Table 7.19 GROUP Command............................................................................................................... 7.28

Table 7.20 HELP Command .................................................................................................................. 7.29

Table 7.21 HISTORY Command ........................................................................................................... 7.29

Table 7.22 IDENTIFICATION Command............................................................................................. 7.29

Table 7.23 IRI Command....................................................................................................................... 7.29

Table 7.24 LDP Commands ................................................................................................................... 7.30

Table 7.25 LDP Command Parameters.................................................................................................. 7.30

Table 7.26 L_D Command (Load Firmware) ........................................................................................ 7.31

Table 7.27 LOO Command .................................................................................................................... 7.31

Table 7.28 Meter Command................................................................................................................... 7.32

Table 7.29 Meter Command Parameters................................................................................................ 7.32

Table 7.30 Meter Class........................................................................................................................... 7.32

Table 7.31 PASSWORD Command.......................................................................................................7.33

Table 7.32 PAS Command Format......................................................................................................... 7.33

Table 7.33 Factory Default Passwords for Access Levels 1 and 2......................................................... 7.33

Table 7.34 Valid Password Characters ................................................................................................... 7.34

Table 7.35 PUL OUTnnn Command ..................................................................................................... 7.35

Table 7.36 QUIT Command................................................................................................................... 7.35

Table 7.37 R_S Command (Restore Factory Defaults).......................................................................... 7.35

Table 7.38 SER Command (Sequential Events Recorder Report)......................................................... 7.35

Table 7.39 SER Command Format ........................................................................................................ 7.36

Table 7.40 SER D Command ................................................................................................................. 7.36

Table 7.41 SET Command (Change Settings) ....................................................................................... 7.36

Table 7.42 SET Command Format......................................................................................................... 7.37

Table 7.43 SET Command Editing Keystrokes...................................................................................... 7.37

Table 7.44 SHOW Command (Show/View Settings)............................................................................. 7.38

Table 7.45 SHOW Command Format ....................................................................................................7.38

Table 7.46 STATUS Command (Relay Self-Test Status)....................................................................... 7.39

Table 7.47 STATUS Command Report and Definitions ........................................................................ 7.40

Table 7.48 SUMMARY Command........................................................................................................7.41

Table 7.49 TARGET Command (Display Relay Word Bit Status)........................................................ 7.41

Table 7.50 TARGET Command Format ................................................................................................ 7.41

Table 7.51 Front-Panel LEDs and the TAR 0 Command....................................................................... 7.41

Table 7.52 TIME Command (View/Change Time)................................................................................ 7.42

Table 7.53 TRIGGER Command (Trigger Event Report) ..................................................................... 7.42

Table 8.1 Front-Panel Automatic Messages (FP_AUTO := OVERRIDE) ............................................ 8.3

Table 8.2 Front-Panel Pushbutton Functions ......................................................................................... 8.5

Table 8.3 Possible Warning Conditions (Flashing TRIP LED) ........................................................... 8.13

Table 8.4 SEL-751A Front-Panel Operator Control Functions ........................................................... 8.15

Table 9.1 Event Types ............................................................................................................................ 9.4

Table 9.2 Event Report Current and Voltage Columns .......................................................................... 9.7

Table 9.3 Output, Input, Protection, and Control Element Event Report Columns ............................... 9.8

Table 10.1 Serial Port Commands That Clear Relay Data Buffers........................................................ 10.5

Table 10.2 Phase Current Measuring Accuracy..................................................................................... 10.6

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SEL-751A Relay Instruction Manual Date Code 20100129

List of Tables

Table 10.3 Current Unbalance Measuring Accuracy ............................................................................. 10.6

Table 10.4 Power Quantity Accuracy—Wye Voltages........................................................................... 10.7

Table 10.5 Power Quantity Accuracy—Delta Voltages ......................................................................... 10.8

Table 10.6 Periodic Relay Checks ....................................................................................................... 10.11

Table 10.7 Relay Self-Tests.................................................................................................................. 10.12

Table 10.8 Troubleshooting.................................................................................................................. 10.14

Table A.1 Firmware Revision History ................................................................................................... A.1

Table A.2 ACSELERATOR Architect CID File Compatibility ................................................................ A.3

Table A.3 Instruction Manual Revision History .................................................................................... A.4

Table C.1 Supported Serial Command Sets............................................................................................C.1

Table C.2 Compressed ASCII Commands .............................................................................................C.2

Table C.3 SEL Communications Processors Protocol Interfaces...........................................................C.4

Table C.4 SEL Communications Processor Port 1 Settings ...................................................................C.7

Table C.5 SEL Communications Processor Data Collection Automessages..........................................C.8

Table C.6 SEL Communications Processor Port 1 Automatic Messaging Settings ...............................C.8

Table C.7 SEL Communications Processor Port 1 Region Map ............................................................C.8

Table C.8 Communications Processor METER Region Map.................................................................C.9

Table C.9 Communications Processor TARGET Region .....................................................................C.10

Table C.10 Communications Processor DEMAND Region Map...........................................................C.11

Table D.1 DNP3 Implementation Levels ............................................................................................... D.2

Table D.2 Selected DNP3 Function Codes ............................................................................................D.3

Table D.3 DNP3 Access Methods.......................................................................................................... D.4

Table D.4 TCP/UDP Selection Guidelines ............................................................................................D.6

Table D.5 DNP3 Access Methods.......................................................................................................... D.6

Table D.6 SEL-751A Event Buffer Capacity......................................................................................... D.9

Table D.7 Port DNP3 Protocol Settings............................................................................................... D.11

Table D.8 Serial Port DNP3 Modem Settings...................................................................................... D.12

Table D.9 Sample Custom DNP3 AI Map........................................................................................... D.17

Table D.10 SEL-751A DNP3 Device Profile ........................................................................................ D.20

Table D.11 SEL-751A DNP Object List................................................................................................ D.21

Table D.12 DNP3 Reference Data Map................................................................................................. D.25

Table D.13 DNP3 Default Data Map..................................................................................................... D.26

Table D.14 Example Object 12 Trip/Close or Code Selection Operation ............................................. D.27

Table E.1 Modbus Query Fields .............................................................................................................E.2

Table E.2 SEL-751A Modbus Function Codes ......................................................................................E.2

Table E.3 SEL-751A Modbus Exception Codes ....................................................................................E.3

Table E.4 01h Read Discrete Output Coil Status Command..................................................................E.3

Table E.5 Responses to 01h Read Discrete Output Coil Query Errors ..................................................E.4

Table E.6 02h Read Input Status Command...........................................................................................E.4

Table E.7 02h SEL-751A Inputs.............................................................................................................E.5

Table E.8 Responses to 02h Read Input Query Errors ...........................................................................E.8

Table E.9 03h Read Holding Register Command...................................................................................E.9

Table E.10 Responses to 03h Read Holding Register Query Errors ........................................................E.9

Table E.11 04h Read Input Register Command .......................................................................................E.9

Table E.12 Responses to 04h Read Input Register Query Errors...........................................................E.10

Table E.13 05h Force Single Coil Command.........................................................................................E.10

Table E.14 01h, 05h SEL-751A Output .................................................................................................E.10

Table E.15 Responses to 05h Force Single Coil Query Errors...............................................................E.13

Table E.16 06h Preset Single Register Command..................................................................................E.14

Table E.17 Responses to 06h Preset Single Register Query Errors........................................................E.14

Table E.18 10h Preset Multiple Registers Command.............................................................................E.14

Table E.19 10h Preset Multiple Registers Query Error Messages .........................................................E.15

Table E.20 60h Read Parameter Information Command........................................................................E.15

Table E.21 60h Read Parameter Descriptor Field Definition .................................................................E.15

Table E.22 60h Read Parameter Conversion Field Definition................................................................E.16

Table E.23 Responses to 60h Read Parameter Information Query Errors .............................................E.16

Table E.24 61h Read Parameter Text Command....................................................................................E.17

Table E.25 61h Read Parameter Text Query Error Messages.................................................................E.17

Date Code 20100129 Instruction Manual SEL-751A Relay

List of Tables

Table E.26 62h Read Enumeration Text Command ...............................................................................E.17

Table E.27 61h Read Parameter Enumeration Text Query Error Messages...........................................E.18

Table E.28 7Dh Encapsulated Packet With Control Command .............................................................E.18

Table E.29 7Dh Encapsulated Packet Query Errors ...............................................................................E.19

Table E.30 7Eh NOP Command.............................................................................................................E.19

Table E.31 Modbus Register Labels for Use With SET M Command...................................................E.21

Table E.32 Modbus Register Map ..........................................................................................................E.26

Table F.1 IEC 61850 Document Set....................................................................................................... F.2

Table F.2 Example IEC 61850 Descriptor Components ........................................................................ F.4

Table F.3 SEL-751A Logical Devices.................................................................................................... F.4

Table F.4 Buffered Report Control Block Client Access ....................................................................... F.6

Table F.5 Unbuffered Report Control Block Client Access................................................................... F.7

Table F.6 IEC 61850 Settings............................................................................................................... F.10

Table F.7 ICD Logical Nodes Summary .............................................................................................. F.12

Table F.8 Metering and Measurement Logical Nodes ......................................................................... F.16

Table F.9 Thermal Metering Data ........................................................................................................ F.16

Table F.10 MSTA Class ......................................................................................................................... F.17

Table F.11 MDST Class ......................................................................................................................... F.17

Table F.12 Logical Device: PRO (Protection)........................................................................................ F.18

Table F.13 Logical Device: MET (Metering).........................................................................................F.21

Table F.14 Logical Device: CON (Control) ........................................................................................... F.24

Table F.15 Logical Device: ANN (Annunciation) ................................................................................. F.24

Table F.16 PICS for A-Profile Support .................................................................................................. F.25

Table F.17 PICS for T-Profile Support................................................................................................... F.25

Table F.18 MMS Service Supported Conformance ............................................................................... F.25

Table F.19 MMS Parameter CBB .......................................................................................................... F.28

Table F.20 Alternate Access Selection Conformance Statement ........................................................... F.28

Table F.21 VariableAccessSpecification Conformance Statement ........................................................ F.28

Table F.22 VariableSpecification Conformance Statement.................................................................... F.29

Table F.23 Read Conformance Statement.............................................................................................. F.29

Table F.24 GetVariableAccessAttributes Conformance Statement........................................................ F.29

Table F.25 DefineNamedVariableList Conformance Statement ............................................................ F.29

Table F.26 GetNamedVariableListAttributes Conformance Statement ................................................. F.30

Table F.27 DeleteNamedVariableList .................................................................................................... F.30

Table F.28 GOOSE Conformance.......................................................................................................... F.30

Table F.29 ACSI Basic Conformance Statement ................................................................................... F.31

Table F.30 ACSI Models Conformance Statement ................................................................................ F.31

Table F.31 ACSI Services Conformance Statement............................................................................... F.32

Table H.1 PMU Settings in the SEL-751A for C37.118 Protocol in Global Settings ........................... H.4

Table H.2 SEL-751A Serial Port Settings for Synchrophasors ............................................................. H.5

Table H.3 Synchrophasor Order in Data Stream (Voltages and Currents)............................................. H.6

Table H.4 User-Defined Analog Values Selected by the NUMANA Setting ........................................ H.7

Table H.5 User-Defined Digital Status Words Selected by the NUMDSW Setting .............................. H.7

Table H.6 Synchrophasor Trigger Relay Word Bits .............................................................................. H.8

Table H.7 Time Synchronization Relay Word Bits................................................................................ H.9

Table H.8 Size of a C37.118 Synchrophasor Message ........................................................................ H.11

Table H.9 Serial Port Bandwidth for Synchrophasors (in Bytes) ........................................................ H.11

Table I.1 Number of MIRRORED BITS Messages for Different Baud .....................................................I.2

Table I.2 Positions of the MIRRORED BITS .............................................................................................I.3

Table I.3 MIRRORED BITS Values for a RXDFLT Setting of 10100111.................................................I.3

Table I.4 MIRRORED BITS Communications Message Transmission Period..........................................I.5

Table I.5 MIRRORED BITS Protocol Settings ..........................................................................................I.5

Table J.1 SEL-751A Relay Word Bits....................................................................................................J.1

Table J.2 Relay Word Bit Definitions for the SEL-751A .......................................................................J.4

Table K.1 Analog Quantities ................................................................................................................ K.1

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Date Code 20100129 Instruction Manual SEL-751A Relay

List of Figures

R.Instruct ion Manual Figure 1.1 Typical Current Connections................................................................................................ 1.15

Figure 1.2 Response Header .................................................................................................................. 1.17

Figure 1.3 STA Command Response—No Communications Card or EIA-232⁄EIA-485

Communications Card ...................................................................................................... 1.17

Figure 1.4 STA Command Response—Communications Card/DeviceNet Protocol............................ 1.18

Figure 2.1 Relay Panel-Mount Dimensions............................................................................................. 2.2

Figure 2.2 Slot Allocations for Different Cards ...................................................................................... 2.3

Figure 2.3 Circuit Board of Analog I/O Board, Showing Jumper Selection ......................................... 2.11

Figure 2.4 JMP1 Through JMP4 Locations on 4 AI/4 AO Board ......................................................... 2.11

Figure 2.5 Current Output Jumpers ....................................................................................................... 2.12

Figure 2.6 Voltage Output Jumpers ....................................................................................................... 2.12

Figure 2.7 Pins for Password, Breaker Control, and SELBOOT Jumper................................................ 2.12

Figure 2.8 Rear-Panel Connections of Selected Cards .......................................................................... 2.14

Figure 2.9 Fiber-Optic Serial, Ethernet, EIA-232 Communication, 3 DI/4 DO/1 AO, and 3 AVI

Voltage Option .................................................................................................................. 2.15

Figure 2.10 Fiber-Optic Serial, Ethernet, 8 DI, RTD, and 4 AI/4 AO Option ........................................ 2.16

Figure 2.11 Dual Fiber-Optic Ethernet, Fiber-Optic Serial, DeviceNet, Fast Hybrid 4 DI/4 DO, and

Voltage Option With Monitoring Package........................................................................ 2.16

Figure 2.12 Fiber-Optic Serial, Ethernet, EIA-232 Communication, 4 DO/3 DI/1AO, and

3 AVI/4 AFDI Voltage Option With Arc-Flash Detector Inputs ...................................... 2.17

Figure 2.13 Control I/O Connections—4 AI/4 AO Option in Slot D and Fiber-Optic Port in Slot B..... 2.19

Figure 2.14 Control I/O Connections—Internal RTD Option ................................................................. 2.19

Figure 2.15 Output OUT103 Relay Output Contact Configuration ........................................................ 2.20

Figure 2.16 OUT103 Contact Fail-Safe and Nonfail-Safe Options......................................................... 2.20

Figure 2.17 Single-Phase Voltage Connections....................................................................................... 2.21

Figure 2.18 Voltage Connections............................................................................................................. 2.22

Figure 2.19 Typical Current Connections................................................................................................ 2.23

Figure 2.20 SEL-751A Provides Overcurrent Protection and Reclosing for a Distribution Feeder

(Includes Fast Bus Trip Scheme) (Delta-Connected PTs)................................................ 2.24

Figure 2.21 SEL-751A Provides Overcurrent Protection for a Distribution Bus

(Includes Fast Bus Trip Scheme) (Wye-Connected PTs) ................................................. 2.25

Figure 2.22 SEL-751A Provides Overcurrent Protection for a Delta-Wye Transformer Bank

(Wye-Connected PTs)....................................................................................................... 2.26

Figure 2.23 SEL-751A Provides Overcurrent Protection for a Transformer Bank With a

Tertiary Winding (Wye-Connected PTs) .......................................................................... 2.27

Figure 2.24 SEL-751A Provides Overcurrent Protection for an Industrial Distribution Feeder

(Core-Balance Current Transformer Connected to Channel IN)...................................... 2.28

Figure 2.25 SEL-751A With an Arc-Flash Option Card and Fiber-Optic-Based Point-Sensor.............. 2.29

Figure 2.26 Jacketed-Fiber installation Example .................................................................................... 2.30

Figure 2.27 Connecting Sensor Fibers to the Relay ................................................................................ 2.30

Figure 2.28 Point-Sensor Assembly ........................................................................................................ 2.30

Figure 2.29 Point-Sensor Installation ...................................................................................................... 2.31

Figure 2.30 Point-Sensor Directivity (0–360° Around the Mounting Plane) .......................................... 2.31

Figure 2.31 Point-Sensor Directivity (Front to Back, Above the Mounting Plane) ................................ 2.32

Figure 2.32 Point-Sensor Directivity (Left to Right, Above the Mounting Plane).................................. 2.32

Figure 2.33 Bare-Fiber Sensor Assembly................................................................................................ 2.33

Figure 2.34 Bare-Fiber Sensor Mounting Example................................................................................. 2.33

Figure 2.35 Bare-Fiber Sensor Components (V-Pin Style) ..................................................................... 2.33

Figure 2.36 Bare-Fiber Sensor Showing Transition From Bare- to Jacketed-Fiber Section ................... 2.34

Figure 2.37 Switchgear Application Example......................................................................................... 2.35

Figure 3.1 Serial Port Communication Dialog Box................................................................................. 3.2

Figure 3.2 Serial Port Communication Parameters Dialog Box.............................................................. 3.3

Figure 3.3 Network Communication Parameters Dialog Box................................................................. 3.3

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SEL-751A Relay Instruction Manual Date Code 20100129

List of Figures

Figure 3.4 Tools Menu............................................................................................................................. 3.4

Figure 3.5 Device Response to the ID Command ................................................................................... 3.4

Figure 3.6 Selection of Drivers................................................................................................................ 3.7

Figure 3.7 Update Part Number............................................................................................................... 3.8

Figure 3.8 New Setting Screen ................................................................................................................ 3.8

Figure 3.9 Expressions Created With Expression Builder .................................................................... 3.10

Figure 3.10 Composite Screens for Retrieving Events............................................................................ 3.11

Figure 3.11 Saving the Retrieved Event .................................................................................................. 3.12

Figure 3.12 Device Overview Screen ...................................................................................................... 3.13

Figure 3.13 Control Screen...................................................................................................................... 3.14

Figure 3.14 Remote Operation Selection................................................................................................. 3.14

Figure 4.1 Instantaneous Overcurrent Element Logic............................................................................. 4.7

Figure 4.2 Ground Fault Protection Using Core-Balance CT ................................................................. 4.8

Figure 4.3 Phase Time-Overcurrent Elements 51AT, 51BT, and 51CT ................................................ 4.11

Figure 4.4 Maximum Phase Time-Overcurrent Elements 51P1T and 51P2T....................................... 4.12

Figure 4.5 Negative-Sequence Time-Overcurrent Element 51QT ........................................................ 4.13

Figure 4.6 Neutral Time-Overcurrent Elements 51N1T and 51N2T..................................................... 4.14

Figure 4.7 Residual Time-Overcurrent Elements 51G1T and 51G2T................................................... 4.15

Figure 4.8 U.S. Moderately Inverse Curve: U1 ..................................................................................... 4.17

Figure 4.9 U.S. Inverse Curve: U2 ........................................................................................................ 4.18

Figure 4.10 U.S. Very Inverse Curve: U3................................................................................................ 4.19

Figure 4.11 U.S. Extremely Inverse Curve: U4....................................................................................... 4.20

Figure 4.12 U.S. Short-Time Inverse Curve: U5 .....................................................................................4.21

Figure 4.13 IEC Class A Curve (Standard Inverse): C1.......................................................................... 4.22

Figure 4.14 IEC Class B Curve (Very Inverse): C2................................................................................. 4.23

Figure 4.15 IEC Class C Curve (Extremely Inverse): C3........................................................................ 4.24

Figure 4.16 IEC Long-Time Inverse Curve: C4 ...................................................................................... 4.25

Figure 4.17 IEC Short-Time Inverse Curve: C5 ......................................................................................4.26

Figure 4.18 Undervoltage Element Logic................................................................................................ 4.31

Figure 4.19 Overvoltage Element Logic.................................................................................................. 4.32

Figure 4.20 Synchronism-Check Voltage Window and Slip Frequency Elements.................................. 4.33

Figure 4.21 Synchronism-Check Elements ............................................................................................. 4.34

Figure 4.22 Angle Difference Between VP and VS Compensated by Breaker Close Time

(fP < fS and VP Shown as Reference in This Example) .................................................. 4.39

Figure 4.23 Three-Phase Power Elements Logic..................................................................................... 4.43

Figure 4.24 Power Elements Operation in the Real/Reactive Power Plane............................................. 4.44

Figure 4.25 Power Factor Elements Logic .............................................................................................. 4.45

Figure 4.26 Loss-of-Potential (LOP) Logic............................................................................................. 4.47

Figure 4.27 Over- and Underfrequency Element Logic .......................................................................... 4.48

Figure 4.28 81R Frequency Rate-of-Change Scheme Logic................................................................... 4.49

Figure 4.29 Trip Logic............................................................................................................................. 4.51

Figure 4.30 Close Logic .......................................................................................................................... 4.53

Figure 4.31 Reclose Supervision Logic (Following Open Interval Time-Out) ....................................... 4.54

Figure 4.32 Reclose Supervision Limit Timer Operation........................................................................ 4.55

Figure 4.33 SEL-751A Relays Installed at Both Ends of a Transmission Line in a

High-Speed Reclose Scheme............................................................................................ 4.57

Figure 4.34 Reclosing Relay States and General Operation.................................................................... 4.60

Figure 4.35 Reclosing Sequence From Reset to Lockout With Example Settings.................................. 4.64

Figure 4.36 Reclose Blocking for Islanded Generator ............................................................................ 4.71

Figure 4.37 Sequence Coordination Between the SEL-751A and a Line Recloser ................................ 4.73

Figure 4.38 Operation of SEL-751A Shot Counter for Sequence Coordination With Line Recloser

(Additional Settings Example 1) ...................................................................................... 4.74

Figure 4.39 Operation of SEL-751A Shot Counter for Sequence Coordination With Line Recloser

(Additional Settings Example 2) ...................................................................................... 4.75

Figure 4.40 Demand Current Logic Outputs ........................................................................................... 4.77

Figure 4.41 Response of Thermal and Rolling Demand Meters to a Step Input (Setting

DMTC = 15 minutes) ....................................................................................................... 4.78

Figure 4.42 Voltage VSApplied to Series RC Circuit............................................................................. 4.79

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Date Code 20100129 Instruction Manual SEL-751A Relay

List of Figures

Figure 4.43 Schematic Diagram of a Traditional Latching Device......................................................... 4.82

Figure 4.44 Logic Diagram of a Latch Switch ........................................................................................ 4.82

Figure 4.45 SELOGIC Control Equation Variable/Timers SV01/SV01T—SV32T ................................. 4.83

Figure 4.46 Result of Falling-Edge Operator on a Deasserting Input ..................................................... 4.86

Figure 4.47 Example Use of SELOGIC Variables/Timers........................................................................ 4.88

Figure 4.48 Counter 01............................................................................................................................ 4.89

Figure 4.49 Example of the Effects of the Input Precedence .................................................................. 4.90

Figure 4.50 Phase Rotation Setting ......................................................................................................... 4.92

Figure 4.51 Breaker Failure Logic........................................................................................................... 4.95

Figure 4.52 Arc-Flash Instantaneous Overcurrent Element Logic .......................................................... 4.96

Figure 4.53 Inverse Time-Overlight Element Logic................................................................................ 4.97

Figure 4.54 TOL Element Inverse Curve Characteristic ......................................................................... 4.98

Figure 4.55 Analog Input Card Adaptive Name.................................................................................... 4.100

Figure 4.56 Settings to Configure Input 1 as a 4–20 mA Transducer ................................................... 4.103

Figure 4.57 Analog Output Number Allocation .................................................................................... 4.104

Figure 4.58 Analog Output Settings ...................................................................................................... 4.105

Figure 4.59 DC Mode Processing.......................................................................................................... 4.106

Figure 4.60 AC Mode Processing.......................................................................................................... 4.106

Figure 4.61 Timing Diagram for Debounce Timer Operation When Operating in AC Mode .............. 4.106

Figure 4.62 Display Point Settings ........................................................................................................ 4.114

Figure 4.63 Front-Panel Display—Both HV and LV Breakers Open ................................................... 4.115

Figure 4.64 Front-Panel Display—HV Breaker Closed, LV Breaker Open.......................................... 4.115

Figure 4.65 Front-Panel Display—Both HV and LV Breakers Closed ................................................. 4.115

Figure 4.66 Front-Panel Display—HV Breaker Open, LV Breaker Closed.......................................... 4.115

Figure 4.67 Front-Panel Display—HV Breaker Open, LV Breaker Closed.......................................... 4.115

Figure 4.68 Front-Panel Display for a Binary Entry in the Name String Only ..................................... 4.116

Figure 4.69 Front-Panel Display for an Analog Entry in the Name String Only .................................. 4.116

Figure 4.70 Front-Panel Display for an Entry in (a) Boolean Name and Alias Strings and

(b) Analog Name and User Text and Formatting Strings ............................................... 4.117

Figure 4.71 Front-Panel Display for an Entry in (a) Boolean Name and Alias Strings and

(b) Analog Name, User Text and Formatting Strings, and Engineering Units............... 4.117

Figure 4.72 Adding Temperature Measurement Display Points ........................................................... 4.118

Figure 4.73 Rotating Display................................................................................................................. 4.119

Figure 4.74 Adding Two Local Bits ...................................................................................................... 4.120

Figure 5.1 Complex Power Measurement Conventions .......................................................................... 5.2

Figure 5.2 METER Command Report With Enhanced Voltage Option With Monitoring Package........ 5.4

Figure 5.3 METER T Command Report With RTDs .............................................................................. 5.5

Figure 5.4 Device Response to the METER E Command....................................................................... 5.5

Figure 5.5 Device Response to the METER RE Command.................................................................... 5.6

Figure 5.6 Device Response to the METER M Command...................................................................... 5.7

Figure 5.7 Device Response to the METER RM Command................................................................... 5.7

Figure 5.8 Device Response to the METER MV Command................................................................... 5.7

Figure 5.9 Device Response to the METER RMS Command................................................................. 5.8

Figure 5.10 Device Response to the METER AI Command..................................................................... 5.8

Figure 5.11 Device Response to the METER L (Light) Command .......................................................... 5.9

Figure 5.12 Device Response to the MET DE Command......................................................................... 5.9

Figure 5.13 Device Response to the MET PE Command........................................................................ 5.10

Figure 5.14 Device Response to the LDP Command .............................................................................. 5.11

Figure 5.15 DC Under- and Overvoltage Elements................................................................................. 5.12

Figure 5.16 Create DC Voltage Elements With SELOGIC Control Equations......................................... 5.13

Figure 5.17 Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker ....................................... 5.17

Figure 5.18 SEL-751A Breaker Maintenance Curve for a 25 kV Circuit Breaker ................................. 5.18

Figure 5.19 Operation of SELOGIC Control Equation Breaker Monitor Initiation Setting ..................... 5.19

Figure 5.20 Breaker Monitor Accumulates 10 Percent Wear.................................................................. 5.20

Figure 5.21 Breaker Monitor Accumulates 25 Percent Wear.................................................................. 5.21

Figure 5.22 Breaker Monitor Accumulates 50 Percent Wear.................................................................. 5.22

Figure 5.23 Breaker Monitor Accumulates 100 Percent Wear................................................................ 5.23

Figure 5.24 Input INxxx Connected to Trip Bus for Breaker Monitor Initiation.................................... 5.25

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SEL-751A Relay Instruction Manual Date Code 20100129

List of Figures

Figure 6.1 Front-Panel Setting Entry Example........................................................................................ 6.3

Figure 7.1 Simple Ethernet Network Configuration................................................................................ 7.3

Figure 7.2 Ethernet Network Configuration With Dual Redundant Connections (Failover Mode)........ 7.4

Figure 7.3 Ethernet Network Configuration With Ring Structure (Switched Mode).............................. 7.4

Figure 7.4 IRIG-B Input (Relay Terminals B01–B02)............................................................................ 7.6

Figure 7.5 IRIG-B Input Via EIA-232 Port 3 (SEL Communications Processor as Source).................. 7.6

Figure 7.6 IRIG-B Input VIA EIA-232 Port 3 (SEL-2401/2404/2407 Time Source)............................. 7.7

Figure 7.7 IRIG-B Input VIA Fiber-Optic EIA-232 Port 2 (SEL-2030/2032 Time Source) .................. 7.7

Figure 7.8 IRIG-B Input VIA Fiber-Optic EIA-232 Port 2 (SEL-2401/2404/2407 Time Source) ......... 7.7

Figure 7.9 EIA-232 DB-9 Connector Pin Numbers ................................................................................ 7.8

Figure 7.10 SEL Cable C234A—SEL-751A to DTE Device................................................................... 7.9

Figure 7.11 SEL Cable C227A—SEL-751A to DTE Device................................................................... 7.9

Figure 7.12 SEL Cable C222—SEL-751A to Modem ............................................................................. 7.9

Figure 7.13 SEL Cable C272A—SEL-751A to SEL Communications Processor

Without IRIG-B Signal..................................................................................................... 7.10

Figure 7.14 SEL Cable C273A—SEL-751A to SEL Communications Processor

With IRIG-B Signal .......................................................................................................... 7.10

Figure 7.15 SEL Cable C387—SEL-751A to SEL-3010........................................................................ 7.10

Figure 7.16 AFT Command Response .................................................................................................... 7.19

Figure 7.17 Ethernet Port (PORT 1) Status Report ................................................................................. 7.25

Figure 7.18 Non-Redundant Port Response ............................................................................................ 7.25

Figure 7.19 GOOSE Command Response............................................................................................... 7.28

Figure 7.20 PING Command Response................................................................................................... 7.34

Figure 7.21 SHOW Command Example ................................................................................................. 7.39

Figure 7.22 Typical Relay Output for STATUS Command..................................................................... 7.40

Figure 8.1 Front-Panel Overview ............................................................................................................ 8.2

Figure 8.2 Access Level Security Padlock Symbol................................................................................. 8.3

Figure 8.3 Password Entry Screen........................................................................................................... 8.4

Figure 8.4 Front-Panel Pushbuttons......................................................................................................... 8.4

Figure 8.5 Main Menu ............................................................................................................................. 8.5

Figure 8.6 MAIN Menu and METER Submenu ..................................................................................... 8.6

Figure 8.7 METER Menu and ENERGY Submenu................................................................................ 8.6

Figure 8.8 Relay Response When Energy (or Max/Min, Demand, Peak Demand) Metering Is Reset... 8.6

Figure 8.9 Relay Response When No Analog Cards Are Installed......................................................... 8.6

Figure 8.10 Relay Response When No Math Variables Enabled .............................................................. 8.7

Figure 8.11 MAIN Menu and EVENTS Submenu.................................................................................... 8.7

Figure 8.12 EVENTS Menu and DISPLAY Submenu.............................................................................. 8.7

Figure 8.13 Relay Response When No Event Data Available................................................................... 8.7

Figure 8.14 Relay Response When Events Are Cleared ........................................................................... 8.7

Figure 8.15 MAIN Menu and TARGETS Submenu ................................................................................. 8.8

Figure 8.16 TARGETS Menu Navigation ................................................................................................. 8.8

Figure 8.17 MAIN Menu and CONTROL Submenu ................................................................................ 8.8

Figure 8.18 CONTROL Menu and OUTPUTS Submenu......................................................................... 8.9

Figure 8.19 CONTROL Menu and LOCAL BITS Submenu.................................................................... 8.9

Figure 8.20 MAIN Menu and SET/SHOW Submenu ............................................................................. 8.10

Figure 8.21 SET/SHOW Menu................................................................................................................ 8.11

Figure 8.22 MAIN Menu and Status Submenu ....................................................................................... 8.11

Figure 8.23 MAIN Menu and Breaker Submenu .................................................................................... 8.12

Figure 8.24 Factory Default Front-Panel LEDs....................................................................................... 8.12

Figure 8.25 Target Reset Pushbutton....................................................................................................... 8.13

Figure 8.26 Operator Control Pushbuttons and LEDs............................................................................. 8.14

Figure 9.1 Example Event Summary....................................................................................................... 9.3

Figure 9.2 Sample Event History............................................................................................................. 9.6

Figure 9.3 Example Standard 15-Cycle Event Report 1/4-Cycle Resolution ....................................... 9.12

Figure 9.4 Derivation of Event Report Current Values and RMS Current Values From

Sampled Current Waveform ............................................................................................. 9.13

Figure 9.5 Derivation of Phasor RMS Current Values From Event Report Current Values.................. 9.14

Figure 9.6 Example Sequential Events Recorder (SER) Event Report ................................................. 9.15

Date Code 20100129 Instruction Manual SEL-751A Relay

List of Figures

Figure 10.1 Three-Phase Wye AC Connections ...................................................................................... 10.3

Figure 10.2 Three-Phase Open-Delta AC Connections........................................................................... 10.4

Figure 10.3 Current Source Connections................................................................................................. 10.6

Figure 10.4 Wye Voltage Source Connections ........................................................................................10.7

Figure 10.5 Delta Voltage Source Connections....................................................................................... 10.8

Figure 10.6 CEV R LIght Event Capture Example ............................................................................... 10.11

Figure B.1 Firmware File Transfer Process..............................................................................................B.2

Figure C.1 SEL Communications Processor Star Integration Network ...................................................C.3

Figure C.2 Multitiered SEL Communications Processor Architecture....................................................C.4

Figure C.3 Enhancing Multidrop Networks With SEL Communications Processors..............................C.6

Figure C.4 Example of SEL Relay and SEL Communications Processor Configuration........................C.7

Figure D.1 Application Confirmation Timing With URETRY n = 2 ...................................................... D.7

Figure D.2 Message Transmission Timing.............................................................................................. D.8

Figure D.3 Sample Response to SHO DNP Command......................................................................... D.14

Figure D.4 Port MAP Command........................................................................................................... D.15

Figure D.5 Sample Custom DNP3 AI Map Settings............................................................................. D.17

Figure D.6 Analog Input Map Entry in ACSELERATOR QuickSet Software......................................... D.18

Figure D.7 AI Point Label, Scaling and Deadband in ACSELERATOR QuickSet Software .................. D.18

Figure D.8 Sample Custom DNP3 BO Map Settings............................................................................ D.19

Figure D.9 Binary Output Map Entry in ACSELERATOR QuickSet Software....................................... D.19

Figure F.1 SEL-751A Predefined Reports............................................................................................... F.6

Figure F.2 SEL-751A Datasets ................................................................................................................ F.7

Figure F.3 GOOSE Quality...................................................................................................................... F.9

Figure G.1 DeviceNet Card Component Overview................................................................................. G.1

Figure H.1 Phase Reference .................................................................................................................... H.2

Figure H.2 Waveform at Relay Terminals May Have a Phase Shift........................................................ H.3

Figure H.3 Correction of Measured Phase Angle.................................................................................... H.3

Figure H.4 Sample MET PM Command Response............................................................................... H.10

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Date Code 20100129 Instruction Manual SEL-751A Relay

Preface

Manual Overview

The SEL-751A Feeder Protection Relay Instruction Manual describes

common aspects of feeder relay application and use. It includes the necessary

information to install, set, test, and operate the relay.

An overview of each manual section and topics follows:

Preface. Describes the manual organization and conventions used to

present information.

Section 1: Introduction and Specifications.Describes the basic features

and functions of the SEL-751A; lists the relay specifications.

Section 2: Installation.Describes how to mount and wire the SEL-751A;

illustrates wiring connections for various applications.

Section 3: PC Software. Describes the features, installation methods, and

types of help available with the ACSELERATOR QuickSet®SEL-5030

Software.

Section 4: Protection and Logic Functions. Describes the operating

characteristic of each protection element, using logic diagrams and

text, and explains how to calculate element settings; describes contact

output logic, automation, and report settings.

Section 5: Metering and Monitoring. Describes the operation of each

metering function; describes the monitoring functions.

Section 6: Settings. Describes how to enter and record settings for basic

protection, voltage-based protection, and RTD-based protection.

Section 7: Communications. Describes how to connect the SEL-751A to a

PC for communication; shows serial port pinouts; lists and defines

serial port commands. Describes the communications port interfaces

and protocols supported by the relay for serial and Ethernet.

Section 8: Front-Panel Operations. Explains the features and use of the

front panel, including front-panel command menu, default displays,

and automatic messages.

Section 9: Analyzing Events. Describes front-panel LED operation, trip-

type front-panel messages, event summary data, standard event

reports, and Sequential Events Recorder (SER) report.

Section 10: Testing and Troubleshooting. Describes protection element

test procedures, relay self-test, and relay troubleshooting.

Appendix A: Firmware and Manual Versions.Lists the current relay

firmware version and details differences between the current and

previous versions. Provides a record of changes made to the manual

since the initial release.

Appendix B: Firmware Upgrade Instructions.Describes the procedure to

update the firmware stored in flash memory.

Appendix C: SEL Communications Processors.Provides examples of how

to use the SEL-751A with the SEL-2032, SEL-2030, and SEL-2020

Communications Processors for total substation automation solutions.

SEL-751A Relay Instruction Manual Date Code 20100129

Preface

Conventions

Appendix D: DNP3 Communications.Describes the DNP3 protocol support

provided by the SEL-751A.

Appendix E: Modbus RTU Communications.Describes the Modbus®

protocol support provided by the SEL-751A.

Appendix F: IEC 61850 Communications.Describes IEC 61850

implementation in the SEL-751A.

Appendix G: DeviceNet Communications.Describes the use of DeviceNet

(data-link and application protocol) over CAN (hardware protocol).

Appendix H: Synchrophasors.Describes the Phasor Measurement Control

Unit (PMCU), and accessing Synchrophasor data via ASCII

Command (MET PM) and IEEE C37.118 Protocol.

Appendix I: MIRRORED BITS Communications.Describes how SEL protective

relays and other devices can directly exchange information quietly,

securely, and with minimum cost.

Appendix J: Relay Word Bits. Lists and describes the Relay Word bits

(outputs of protection and control elements).

Appendix K: Analog Quantities. Lists and describes the Analog Quantities

(outputs of analog elements).

SEL-751A Relay Command Summary.Briefly describes the serial port

commands that are fully described in Section 7: Communications.

Conventions

Typographic

Conventions

There are many ways to communicate with the SEL-751A. The three primary

methods are:

➤Using a command line interface on a PC terminal emulation

window.

➤Using the front-panel menus and pushbuttons.

➤Using ACSELERATOR QuickSet.

The instructions in this manual indicate these options with specific font and

formatting attributes. The following table lists these conventions.

Typographic Conventions

Example Description

STATUS Commands typed at a command line interface on a PC.

<Enter> Single keystroke on a PC keyboard.

<Ctrl+D> Multiple/combination keystroke on a PC keyboard.

Start > Settings PC dialog boxes and menu selections.

The > character indicates submenus.

{CLOSE} Relay front-panel pushbuttons.

ENABLE Relay front- or rear-panel labels.

Main > Meters Relay front-panel LCD menus and relay responses.

The > character indicates submenus.

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