GE L90 User manual

831776A2.CDR
L90 Line Current Differential
System
UR Series Instruction Manual
L90 revision: 7.0x
Manual P/N: 1601-0081-Y2 (GEK-113672A)
GE Digital Energy
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Tel: [phone] Fax: [phone]
Internet: http://www.GEDigitalEnergy.com
GE Multilin's Quality Management
System is registered to ISO
9001:2008
QMI # 005094
UL # A3775
*1601-0081-Y2*
LISTED
52TL
IND.CONT. EQ.
E83849
GE
Digital Energy

Copyright © 2012 GE Multilin Inc. All rights reserved.
L90 Line Current Differential System UR Series Instruction Manual revision 7.0x.
FlexLogic, FlexElement, FlexCurve, FlexAnalog, FlexInteger, FlexState, EnerVista,
CyberSentry, HardFiber, Digital Energy, Multilin, and GE Multilin are trademarks
or registered trademarks of GE Multilin Inc.
The contents of this manual are the property of GE Multilin Inc. This
documentation is furnished on license and may not be reproduced in whole or
in part without the permission of GE Multilin. The content of this manual is for
informational use only and is subject to change without notice.
Part number: 1601-0081-Y2 (November 2012)

GE Multilin L90 Line Current Differential System iii
TABLE OF CONTENTS
1. GETTING STARTED 1.1 IMPORTANT PROCEDURES
1.1.1 CAUTIONS AND WARNINGS ........................................................................... 1-1
1.1.2 INSPECTION CHECKLIST ................................................................................ 1-1
1.2 UR OVERVIEW
1.2.1 INTRODUCTION TO THE UR ........................................................................... 1-2
1.2.2 HARDWARE ARCHITECTURE ......................................................................... 1-3
1.2.3 SOFTWARE ARCHITECTURE.......................................................................... 1-4
1.2.4 IMPORTANT CONCEPTS ................................................................................. 1-4
1.3 ENERVISTA UR SETUP SOFTWARE
1.3.1 PC REQUIREMENTS ........................................................................................ 1-5
1.3.2 INSTALLATION.................................................................................................. 1-5
1.3.3 CONFIGURING THE L90 FOR SOFTWARE ACCESS..................................... 1-6
1.3.4 USING THE QUICK CONNECT FEATURE....................................................... 1-9
1.3.5 CONNECTING TO THE L90 RELAY ............................................................... 1-15
1.4 UR HARDWARE
1.4.1 MOUNTING AND WIRING............................................................................... 1-16
1.4.2 COMMUNICATIONS........................................................................................ 1-16
1.4.3 FACEPLATE DISPLAY .................................................................................... 1-16
1.5 USING THE RELAY
1.5.1 FACEPLATE KEYPAD..................................................................................... 1-17
1.5.2 MENU NAVIGATION ....................................................................................... 1-17
1.5.3 MENU HIERARCHY ........................................................................................ 1-17
1.5.4 RELAY ACTIVATION....................................................................................... 1-17
1.5.5 RELAY PASSWORDS ..................................................................................... 1-18
1.5.6 FLEXLOGIC™ CUSTOMIZATION................................................................... 1-18
1.5.7 COMMISSIONING ........................................................................................... 1-19
2. PRODUCT DESCRIPTION 2.1 INTRODUCTION
2.1.1 OVERVIEW........................................................................................................ 2-1
2.1.2 FEATURES ........................................................................................................ 2-3
2.1.3 ORDERING........................................................................................................ 2-4
2.1.4 REPLACEMENT MODULES ............................................................................. 2-8
2.2 PILOT CHANNEL RELAYING
2.2.1 INTER-RELAY COMMUNICATIONS............................................................... 2-11
2.2.2 CHANNEL MONITOR ...................................................................................... 2-12
2.2.3 LOOPBACK TEST ........................................................................................... 2-13
2.2.4 DIRECT TRANSFER TRIPPING ..................................................................... 2-13
2.3 FUNCTIONALITY
2.3.1 PROTECTION AND CONTROL FUNCTIONS ................................................ 2-14
2.3.2 METERING AND MONITORING FUNCTIONS ............................................... 2-14
2.3.3 OTHER FUNCTIONS....................................................................................... 2-15
2.4 SPECIFICATIONS
2.4.1 PROTECTION ELEMENTS ............................................................................. 2-16
2.4.2 USER-PROGRAMMABLE ELEMENTS........................................................... 2-20
2.4.3 MONITORING.................................................................................................. 2-21
2.4.4 METERING ...................................................................................................... 2-22
2.4.5 INPUTS ............................................................................................................ 2-23
2.4.6 POWER SUPPLY ............................................................................................ 2-24
2.4.7 OUTPUTS ........................................................................................................ 2-24
2.4.8 COMMUNICATIONS........................................................................................ 2-26
2.4.9 INTER-RELAY COMMUNICATIONS............................................................... 2-26
2.4.10 ENVIRONMENTAL .......................................................................................... 2-27
2.4.11 TYPE TESTS ................................................................................................... 2-28
2.4.12 PRODUCTION TESTS .................................................................................... 2-28
2.4.13 APPROVALS ................................................................................................... 2-29
2.4.14 MAINTENANCE ............................................................................................... 2-29

iv L90 Line Current Differential System GE Multilin
TABLE OF CONTENTS
3. HARDWARE 3.1 DESCRIPTION
3.1.1 PANEL CUTOUT ................................................................................................3-1
3.1.2 MODULE WITHDRAWAL AND INSERTION......................................................3-6
3.1.3 REAR TERMINAL LAYOUT ...............................................................................3-8
3.2 WIRING
3.2.1 TYPICAL WIRING ..............................................................................................3-9
3.2.2 DIELECTRIC STRENGTH................................................................................3-10
3.2.3 CONTROL POWER..........................................................................................3-10
3.2.4 CT/VT MODULES.............................................................................................3-11
3.2.5 PROCESS BUS MODULES .............................................................................3-13
3.2.6 CONTACT INPUTS AND OUTPUTS................................................................3-13
3.2.7 TRANSDUCER INPUTS AND OUTPUTS........................................................3-21
3.2.8 RS232 FACEPLATE PORT..............................................................................3-22
3.2.9 CPU COMMUNICATION PORTS.....................................................................3-22
3.2.10 IRIG-B...............................................................................................................3-24
3.3 PILOT CHANNEL COMMUNICATIONS
3.3.1 DESCRIPTION .................................................................................................3-25
3.3.2 FIBER: LED AND ELED TRANSMITTERS ......................................................3-26
3.3.3 FIBER-LASER TRANSMITTERS .....................................................................3-26
3.3.4 G.703 INTERFACE...........................................................................................3-27
3.3.5 RS422 INTERFACE .........................................................................................3-30
3.3.6 TWO-CHANNEL TWO-CLOCK RS422 INTERFACE.......................................3-32
3.3.7 RS422 AND FIBER INTERFACE .....................................................................3-32
3.3.8 G.703 AND FIBER INTERFACE ......................................................................3-33
3.3.9 IEEE C37.94 INTERFACE................................................................................3-33
3.3.10 C37.94SM INTERFACE ...................................................................................3-37
4. HUMAN INTERFACES 4.1 ENERVISTA UR SETUP SOFTWARE INTERFACE
4.1.1 INTRODUCTION ................................................................................................4-1
4.1.2 CREATING A SITE LIST ....................................................................................4-1
4.1.3 ENERVISTA UR SETUP OVERVIEW................................................................4-1
4.1.4 ENERVISTA UR SETUP MAIN WINDOW..........................................................4-4
4.2 EXTENDED ENERVISTA UR SETUP FEATURES
4.2.1 SETTINGS TEMPLATES ...................................................................................4-5
4.2.2 SECURING AND LOCKING FLEXLOGIC™ EQUATIONS ................................4-9
4.2.3 SETTINGS FILE TRACEABILITY.....................................................................4-11
4.3 FACEPLATE INTERFACE
4.3.1 FACEPLATE.....................................................................................................4-14
4.3.2 LED INDICATORS............................................................................................4-15
4.3.3 CUSTOM LABELING OF LEDS .......................................................................4-18
4.3.4 DISPLAY...........................................................................................................4-24
4.3.5 KEYPAD ...........................................................................................................4-24
4.3.6 BREAKER CONTROL ......................................................................................4-24
4.3.7 MENUS.............................................................................................................4-25
4.3.8 CHANGING SETTINGS ...................................................................................4-27
5. SETTINGS 5.1 OVERVIEW
5.1.1 SETTINGS MAIN MENU ....................................................................................5-1
5.1.2 INTRODUCTION TO ELEMENTS......................................................................5-4
5.1.3 INTRODUCTION TO AC SOURCES..................................................................5-5
5.2 PRODUCT SETUP
5.2.1 SECURITY..........................................................................................................5-8
5.2.2 CYBERSENTRY SECURITY............................................................................5-12
5.2.3 DISPLAY PROPERTIES ..................................................................................5-18
5.2.4 CLEAR RELAY RECORDS ..............................................................................5-19
5.2.5 COMMUNICATIONS ........................................................................................5-20
5.2.6 MODBUS USER MAP ......................................................................................5-44
5.2.7 REAL TIME CLOCK .........................................................................................5-44

GE Multilin L90 Line Current Differential System v
TABLE OF CONTENTS
5.2.8 FAULT REPORTS ........................................................................................... 5-50
5.2.9 OSCILLOGRAPHY .......................................................................................... 5-52
5.2.10 DATA LOGGER ............................................................................................... 5-55
5.2.11 DEMAND.......................................................................................................... 5-56
5.2.12 USER-PROGRAMMABLE LEDS..................................................................... 5-57
5.2.13 USER-PROGRAMMABLE SELF-TESTS ........................................................ 5-61
5.2.14 CONTROL PUSHBUTTONS ........................................................................... 5-61
5.2.15 USER-PROGRAMMABLE PUSHBUTTONS ................................................... 5-63
5.2.16 FLEX STATE PARAMETERS.......................................................................... 5-68
5.2.17 USER-DEFINABLE DISPLAYS ....................................................................... 5-69
5.2.18 INSTALLATION................................................................................................ 5-71
5.3 REMOTE RESOURCES
5.3.1 REMOTE RESOURCES CONFIGURATION................................................... 5-72
5.4 SYSTEM SETUP
5.4.1 AC INPUTS ...................................................................................................... 5-73
5.4.2 POWER SYSTEM............................................................................................ 5-74
5.4.3 SIGNAL SOURCES ......................................................................................... 5-75
5.4.4 L90 POWER SYSTEM..................................................................................... 5-78
5.4.5 BREAKERS...................................................................................................... 5-83
5.4.6 DISCONNECT SWITCHES ............................................................................. 5-87
5.4.7 FLEXCURVES™.............................................................................................. 5-90
5.4.8 PHASOR MEASUREMENT UNIT.................................................................... 5-97
5.5 FLEXLOGIC
5.5.1 INTRODUCTION TO FLEXLOGIC ................................................................ 5-120
5.5.2 FLEXLOGIC RULES ...................................................................................... 5-132
5.5.3 FLEXLOGIC EVALUATION ........................................................................... 5-133
5.5.4 FLEXLOGIC EXAMPLE ................................................................................. 5-133
5.5.5 FLEXLOGIC EQUATION EDITOR................................................................. 5-138
5.5.6 FLEXLOGIC TIMERS .................................................................................... 5-138
5.5.7 FLEXELEMENTS........................................................................................... 5-139
5.5.8 NON-VOLATILE LATCHES ........................................................................... 5-143
5.6 GROUPED ELEMENTS
5.6.1 OVERVIEW.................................................................................................... 5-144
5.6.2 SETTING GROUP ......................................................................................... 5-144
5.6.3 LINE DIFFERENTIAL ELEMENT................................................................... 5-145
5.6.4 LINE PICKUP................................................................................................. 5-150
5.6.5 DISTANCE ..................................................................................................... 5-152
5.6.6 POWER SWING DETECT............................................................................. 5-170
5.6.7 LOAD ENCROACHMENT.............................................................................. 5-179
5.6.8 PHASE CURRENT ........................................................................................ 5-181
5.6.9 NEUTRAL CURRENT.................................................................................... 5-191
5.6.10 WATTMETRIC GROUND FAULT.................................................................. 5-199
5.6.11 GROUND CURRENT..................................................................................... 5-202
5.6.12 NEGATIVE SEQUENCE CURRENT ............................................................. 5-204
5.6.13 BREAKER FAILURE...................................................................................... 5-210
5.6.14 VOLTAGE ELEMENTS.................................................................................. 5-219
5.6.15 SENSITIVE DIRECTIONAL POWER............................................................. 5-225
5.6.16 SUPERVISING ELEMENTS .......................................................................... 5-229
5.7 CONTROL ELEMENTS
5.7.1 OVERVIEW.................................................................................................... 5-233
5.7.2 TRIP BUS....................................................................................................... 5-233
5.7.3 SETTING GROUPS ....................................................................................... 5-235
5.7.4 SELECTOR SWITCH..................................................................................... 5-236
5.7.5 TRIP OUTPUT ............................................................................................... 5-242
5.7.6 UNDERFREQUENCY.................................................................................... 5-248
5.7.7 OVERFREQUENCY ...................................................................................... 5-249
5.7.8 FREQUENCY RATE OF CHANGE................................................................ 5-250
5.7.9 SYNCHROCHECK......................................................................................... 5-252
5.7.10 DIGITAL ELEMENTS..................................................................................... 5-256
5.7.11 DIGITAL COUNTERS .................................................................................... 5-259
5.7.12 MONITORING ELEMENTS ........................................................................... 5-261
5.7.13 PILOT SCHEMES .......................................................................................... 5-284
5.7.14 AUTORECLOSE ............................................................................................ 5-308

vi L90 Line Current Differential System GE Multilin
TABLE OF CONTENTS
5.8 INPUTS/OUTPUTS
5.8.1 CONTACT INPUTS ........................................................................................5-321
5.8.2 VIRTUAL INPUTS ..........................................................................................5-323
5.8.3 CONTACT OUTPUTS ....................................................................................5-324
5.8.4 VIRTUAL OUTPUTS ......................................................................................5-326
5.8.5 REMOTE DEVICES........................................................................................5-327
5.8.6 REMOTE INPUTS ..........................................................................................5-328
5.8.7 REMOTE DOUBLE-POINT STATUS INPUTS ...............................................5-329
5.8.8 REMOTE OUTPUTS ......................................................................................5-329
5.8.9 DIRECT INPUTS/OUTPUTS ..........................................................................5-330
5.8.10 RESETTING ...................................................................................................5-332
5.8.11 IEC 61850 GOOSE ANALOGS ......................................................................5-332
5.8.12 IEC 61850 GOOSE INTEGERS .....................................................................5-333
5.9 TRANSDUCER INPUTS AND OUTPUTS
5.9.1 DCMA INPUTS ...............................................................................................5-334
5.9.2 RTD INPUTS ..................................................................................................5-335
5.9.3 DCMA OUTPUTS ...........................................................................................5-337
5.10 TESTING
5.10.1 TEST MODE...................................................................................................5-340
5.10.2 FORCE CONTACT INPUTS...........................................................................5-341
5.10.3 FORCE CONTACT OUTPUTS.......................................................................5-342
5.10.4 CHANNEL TESTS ..........................................................................................5-343
5.10.5 PHASOR MEASUREMENT UNIT TEST VALUES.........................................5-343
6. ACTUAL VALUES 6.1 OVERVIEW
6.1.1 ACTUAL VALUES MAIN MENU.........................................................................6-1
6.2 STATUS
6.2.1 CONTACT INPUTS ............................................................................................6-3
6.2.2 VIRTUAL INPUTS ..............................................................................................6-3
6.2.3 REMOTE INPUTS ..............................................................................................6-3
6.2.4 REMOTE DOUBLE-POINT STATUS INPUTS ...................................................6-4
6.2.5 DIRECT INPUTS ................................................................................................6-4
6.2.6 CONTACT OUTPUTS ........................................................................................6-4
6.2.7 VIRTUAL OUTPUTS ..........................................................................................6-5
6.2.8 AUTORECLOSE.................................................................................................6-5
6.2.9 REMOTE DEVICES............................................................................................6-5
6.2.10 CHANNEL TESTS ..............................................................................................6-6
6.2.11 DIGITAL COUNTERS.........................................................................................6-7
6.2.12 SELECTOR SWITCHES ....................................................................................6-7
6.2.13 FLEX STATES....................................................................................................6-8
6.2.14 ETHERNET ........................................................................................................6-8
6.2.15 REAL TIME CLOCK SYNCHRONIZING ............................................................6-8
6.2.16 IEC 61850 GOOSE INTEGERS .........................................................................6-9
6.2.17 REMAINING CONNECTION STATUS .............................................................6-10
6.3 METERING
6.3.1 METERING CONVENTIONS ...........................................................................6-11
6.3.2 DIFFERENTIAL CURRENT..............................................................................6-14
6.3.3 SOURCES ........................................................................................................6-15
6.3.4 SENSITIVE DIRECTIONAL POWER ...............................................................6-20
6.3.5 SYNCHROCHECK ...........................................................................................6-20
6.3.6 TRACKING FREQUENCY................................................................................6-20
6.3.7 FREQUENCY RATE OF CHANGE ..................................................................6-20
6.3.8 FLEXELEMENTS™..........................................................................................6-21
6.3.9 IEC 61580 GOOSE ANALOG VALUES ...........................................................6-21
6.3.10 WATTMETRIC GROUND FAULT.....................................................................6-22
6.3.11 PHASOR MEASUREMENT UNIT ....................................................................6-22
6.3.12 TRANSDUCER INPUTS AND OUTPUTS........................................................6-23
6.4 RECORDS
6.4.1 FAULT REPORTS ............................................................................................6-24
6.4.2 EVENT RECORDS...........................................................................................6-24
6.4.3 OSCILLOGRAPHY ...........................................................................................6-25
6.4.4 DATA LOGGER................................................................................................6-25

GE Multilin L90 Line Current Differential System vii
TABLE OF CONTENTS
6.4.5 PHASOR MEASUREMENT UNIT RECORDS................................................. 6-25
6.4.6 BREAKER MAINTENANCE............................................................................. 6-26
6.5 PRODUCT INFORMATION
6.5.1 MODEL INFORMATION .................................................................................. 6-27
6.5.2 FIRMWARE REVISIONS ................................................................................. 6-27
7. COMMANDS AND
TARGETS
7.1 COMMANDS
7.1.1 COMMANDS MENU .......................................................................................... 7-1
7.1.2 VIRTUAL INPUTS.............................................................................................. 7-1
7.1.3 CLEAR RECORDS ............................................................................................ 7-2
7.1.4 SET DATE AND TIME ....................................................................................... 7-2
7.1.5 RELAY MAINTENANCE .................................................................................... 7-3
7.1.6 PHASOR MEASUREMENT UNIT ONE-SHOT.................................................. 7-3
7.1.7 SECURITY ......................................................................................................... 7-5
7.2 TARGETS
7.2.1 TARGETS MENU............................................................................................... 7-6
7.2.2 TARGET MESSAGES ....................................................................................... 7-6
7.2.3 RELAY SELF-TESTS......................................................................................... 7-6
8. SECURITY 8.1 USER ACCOUNTS
8.1.1 OVERVIEW........................................................................................................ 8-1
8.1.2 ENABLING THE SECURITY MANAGEMENT SYSTEM ................................... 8-1
8.1.3 ADDING A NEW USER ..................................................................................... 8-1
8.1.4 MODIFYING USER PRIVILEGES ..................................................................... 8-2
8.2 CYBERSENTRY
8.2.1 OVERVIEW........................................................................................................ 8-4
8.2.2 SECURITY MENU ............................................................................................. 8-6
9. THEORY OF OPERATION 9.1 OVERVIEW
9.1.1 L90 DESIGN ...................................................................................................... 9-1
9.1.2 L90 ARCHITECTURE ........................................................................................ 9-1
9.1.3 REMOVAL OF DECAYING OFFSET................................................................. 9-2
9.1.4 PHASELET COMPUTATION............................................................................. 9-2
9.1.5 DISTURBANCE DETECTION............................................................................ 9-3
9.1.6 FAULT DETECTION .......................................................................................... 9-3
9.1.7 GROUND DIFFERENTIAL ELEMENT............................................................... 9-4
9.1.8 CLOCK SYNCHRONIZATION ........................................................................... 9-5
9.1.9 FREQUENCY TRACKING AND PHASE LOCKING .......................................... 9-6
9.1.10 FREQUENCY DETECTION ............................................................................... 9-7
9.1.11 PHASE DETECTION ......................................................................................... 9-7
9.1.12 PHASE LOCKING FILTER .............................................................................. 9-10
9.1.13 MATCHING PHASELETS................................................................................ 9-11
9.1.14 START-UP ....................................................................................................... 9-11
9.1.15 HARDWARE AND COMMUNICATION REQUIREMENTS ............................. 9-11
9.1.16 ONLINE ESTIMATE OF MEASUREMENT ERRORS ..................................... 9-12
9.1.17 CT SATURATION DETECTION ...................................................................... 9-13
9.1.18 CHARGING CURRENT COMPENSATION ..................................................... 9-13
9.1.19 DIFFERENTIAL ELEMENT CHARACTERISTICS........................................... 9-14
9.1.20 RELAY SYNCHRONIZATION.......................................................................... 9-15
9.2 OPERATING CONDITION CHARACTERISTICS
9.2.1 DESCRIPTION................................................................................................. 9-16
9.2.2 TRIP DECISION EXAMPLE............................................................................. 9-18
9.2.3 TRIP DECISION TEST .................................................................................... 9-18
9.3 DISTANCE ELEMENTS
9.3.1 INTRODUCTION.............................................................................................. 9-20
9.3.2 PHASOR ESTIMATION ................................................................................... 9-20
9.3.3 DISTANCE CHARACTERISTICS .................................................................... 9-21

viii L90 Line Current Differential System GE Multilin
TABLE OF CONTENTS
9.3.4 MEMORY POLARIZATION ..............................................................................9-25
9.3.5 DISTANCE ELEMENTS ANALYSIS.................................................................9-26
9.4 PHASE DISTANCE APPLIED TO POWER TRANSFORMERS
9.4.1 DESCRIPTION .................................................................................................9-30
9.4.2 EXAMPLE.........................................................................................................9-32
9.5 SINGLE-POLE TRIPPING
9.5.1 OVERVIEW ......................................................................................................9-34
9.5.2 PHASE SELECTION ........................................................................................9-37
9.5.3 COMMUNICATIONS CHANNELS FOR PILOT-AIDED SCHEMES.................9-38
9.5.4 PERMISSIVE ECHO SIGNALING....................................................................9-46
9.5.5 PILOT SCHEME / PHASE SELECTOR COORDINATION...............................9-47
9.5.6 CROSS-COUNTRY FAULT EXAMPLE............................................................9-48
9.6 FAULT LOCATOR
9.6.1 OVERVIEW ......................................................................................................9-49
9.6.2 MULTI-ENDED FAULT LOCATOR...................................................................9-49
9.6.3 SINGLE-ENDED FAULT LOCATOR ................................................................9-55
10. APPLICATION OF
SETTINGS
10.1 CT REQUIREMENTS
10.1.1 INTRODUCTION ..............................................................................................10-1
10.1.2 CALCULATION EXAMPLE 1............................................................................10-1
10.1.3 CALCULATION EXAMPLE 2............................................................................10-2
10.2 CURRENT DIFFERENTIAL (87L) SETTINGS
10.2.1 INTRODUCTION ..............................................................................................10-3
10.2.2 CURRENT DIFFERENTIAL PICKUP ...............................................................10-3
10.2.3 CURRENT DIFF RESTRAINT 1.......................................................................10-3
10.2.4 CURRENT DIFF RESTRAINT 2.......................................................................10-3
10.2.5 CURRENT DIFF BREAK POINT ......................................................................10-3
10.2.6 CT TAP .............................................................................................................10-4
10.2.7 BREAKER-AND-A-HALF..................................................................................10-6
10.2.8 DISTRIBUTED BUS PROTECTION.................................................................10-9
10.3 CHANNEL ASYMMETRY COMPENSATION USING GPS
10.3.1 DESCRIPTION ...............................................................................................10-10
10.3.2 COMPENSATION METHOD 1 .......................................................................10-10
10.3.3 COMPENSATION METHOD 2 .......................................................................10-11
10.3.4 COMPENSATION METHOD 3 .......................................................................10-11
10.4 DISTANCE BACKUP/SUPERVISION
10.4.1 DESCRIPTION ...............................................................................................10-13
10.4.2 PHASE DISTANCE ........................................................................................10-14
10.4.3 GROUND DISTANCE.....................................................................................10-15
10.5 PROTECTION SIGNALING SCHEMES
10.5.1 OVERVIEW ....................................................................................................10-17
10.5.2 DIRECT UNDER-REACHING TRANSFER TRIP (DUTT)..............................10-17
10.5.3 PERMISSIVE UNDER-REACHING TRANSFER TRIP (PUTT)......................10-17
10.5.4 PERMISSIVE OVER-REACHING TRANSFER TRIP (POTT)........................10-17
10.5.5 HYBRID POTT SCHEME (HYB-POTT)..........................................................10-18
10.5.6 DIRECTIONAL COMPARISON BLOCKING...................................................10-19
10.5.7 DIRECTIONAL COMPARISON UNBLOCKING .............................................10-20
10.6 SERIES COMPENSATED LINES
10.6.1 DISTANCE SETTINGS ON SERIES COMPENSATED LINES......................10-22
10.6.2 GROUND DIRECTIONAL OVERCURRENT ..................................................10-23
10.7 LINES WITH TAPPED TRANSFORMERS
10.7.1 DESCRIPTION ...............................................................................................10-24
10.7.2 TRANSFORMER LOAD CURRENTS ............................................................10-24
10.7.3 LV-SIDE FAULTS ...........................................................................................10-25
10.7.4 EXTERNAL GROUND FAULTS .....................................................................10-25
10.8 INSTANTANEOUS ELEMENTS
10.8.1 INSTANTANEOUS ELEMENT ERROR DURING L90 SYNCHRONIZATION ...10-
26

GE Multilin L90 Line Current Differential System ix
TABLE OF CONTENTS
10.9 PHASE DISTANCE THROUGH POWER TRANSFORMERS
10.9.1 PHASE DISTANCE PROTECTION ............................................................... 10-27
10.9.2 EXAMPLE ...................................................................................................... 10-28
11. COMMISSIONING 11.1 TESTING
11.1.1 CHANNEL TESTING ....................................................................................... 11-1
11.1.2 CLOCK SYNCHRONIZATION TESTS ............................................................ 11-2
11.1.3 CURRENT DIFFERENTIAL ............................................................................. 11-3
11.1.4 LOCAL-REMOTE RELAY TESTS ................................................................... 11-4
A. FLEXANALOG AND
FLEXINTEGER
PARAMETERS
A.1 PARAMETER LISTS
A.1.1 FLEXANALOG ITEMS .......................................................................................A-1
A.1.2 FLEXINTEGER ITEMS ....................................................................................A-15
B. MODBUS
COMMUNICATIONS
B.1 MODBUS RTU PROTOCOL
B.1.1 INTRODUCTION................................................................................................B-1
B.1.2 PHYSICAL LAYER.............................................................................................B-1
B.1.3 DATA LINK LAYER............................................................................................B-1
B.1.4 CRC-16 ALGORITHM........................................................................................B-2
B.2 MODBUS FUNCTION CODES
B.2.1 SUPPORTED FUNCTION CODES ...................................................................B-3
B.2.2 READ ACTUAL VALUES OR SETTINGS (FUNCTION CODE 03/04H) ...........B-3
B.2.3 EXECUTE OPERATION (FUNCTION CODE 05H) ...........................................B-4
B.2.4 STORE SINGLE SETTING (FUNCTION CODE 06H) .......................................B-4
B.2.5 STORE MULTIPLE SETTINGS (FUNCTION CODE 10H) ................................B-5
B.2.6 EXCEPTION RESPONSES ...............................................................................B-5
B.3 FILE TRANSFERS
B.3.1 OBTAINING RELAY FILES VIA MODBUS ........................................................B-6
B.3.2 MODBUS PASSWORD OPERATION ...............................................................B-7
B.4 MEMORY MAPPING
B.4.1 MODBUS MEMORY MAP .................................................................................B-9
B.4.2 DATA FORMATS .............................................................................................B-80
C. IEC 61850
COMMUNICATIONS
C.1 OVERVIEW
C.1.1 INTRODUCTION................................................................................................C-1
C.1.2 COMMUNICATION PROFILES .........................................................................C-1
C.2 SERVER DATA ORGANIZATION
C.2.1 OVERVIEW........................................................................................................C-2
C.2.2 GGIO1: DIGITAL STATUS VALUES .................................................................C-2
C.2.3 GGIO2: DIGITAL CONTROL VALUES ..............................................................C-2
C.2.4 GGIO3: DIGITAL STATUS AND ANALOG VALUES FROM RECEIVED GOOSE
DATAC-2
C.2.5 GGIO4: GENERIC ANALOG MEASURED VALUES.........................................C-2
C.2.6 MMXU: ANALOG MEASURED VALUES...........................................................C-3
C.2.7 PROTECTION AND OTHER LOGICAL NODES ...............................................C-3
C.3 SERVER FEATURES AND CONFIGURATION
C.3.1 BUFFERED/UNBUFFERED REPORTING........................................................C-5
C.3.2 FILE TRANSFER ...............................................................................................C-5
C.3.3 TIMESTAMPS AND SCANNING .......................................................................C-5
C.3.4 LOGICAL DEVICE NAME..................................................................................C-5
C.3.5 LOCATION.........................................................................................................C-5
C.3.6 LOGICAL NODE NAME PREFIXES ..................................................................C-6
C.3.7 CONNECTION TIMING .....................................................................................C-6

x L90 Line Current Differential System GE Multilin
TABLE OF CONTENTS
C.3.8 NON-IEC 61850 DATA ...................................................................................... C-6
C.3.9 COMMUNICATION SOFTWARE UTILITIES..................................................... C-6
C.4 GENERIC SUBSTATION EVENT SERVICES: GSSE AND GOOSE
C.4.1 OVERVIEW ....................................................................................................... C-7
C.4.2 GSSE CONFIGURATION.................................................................................. C-7
C.4.3 FIXED GOOSE .................................................................................................. C-7
C.4.4 CONFIGURABLE GOOSE ................................................................................ C-7
C.4.5 ETHERNET MAC ADDRESS FOR GSSE/GOOSE ........................................ C-10
C.4.6 GSSE ID AND GOOSE ID SETTINGS............................................................ C-10
C.5 IEC 61850 IMPLEMENTATION VIA ENERVISTA UR SETUP
C.5.1 OVERVIEW ..................................................................................................... C-11
C.5.2 CONFIGURING IEC 61850 SETTINGS .......................................................... C-12
C.5.3 ABOUT ICD FILES .......................................................................................... C-13
C.5.4 CREATING AN ICD FILE WITH ENERVISTA UR SETUP..............................C-17
C.5.5 ABOUT SCD FILES......................................................................................... C-17
C.5.6 IMPORTING AN SCD FILE WITH ENERVISTA UR SETUP........................... C-20
C.6 ACSI CONFORMANCE
C.6.1 ACSI BASIC CONFORMANCE STATEMENT ................................................ C-22
C.6.2 ACSI MODELS CONFORMANCE STATEMENT............................................ C-22
C.6.3 ACSI SERVICES CONFORMANCE STATEMENT.........................................C-23
C.7 LOGICAL NODES
C.7.1 LOGICAL NODES TABLE ............................................................................... C-26
D. IEC 60870-5-104
COMMUNICATIONS
D.1 IEC 60870-5-104
D.1.1 INTEROPERABILITY DOCUMENT................................................................... D-1
D.1.2 POINT LIST ....................................................................................................... D-9
E. DNP COMMUNICATIONS E.1 DEVICE PROFILE DOCUMENT
E.1.1 DNP V3.00 DEVICE PROFILE .......................................................................... E-1
E.1.2 IMPLEMENTATION TABLE .............................................................................. E-4
E.2 DNP POINT LISTS
E.2.1 BINARY INPUT POINTS ................................................................................... E-8
E.2.2 BINARY AND CONTROL RELAY OUTPUT...................................................... E-9
E.2.3 COUNTERS..................................................................................................... E-10
E.2.4 ANALOG INPUTS............................................................................................ E-11
F. MISCELLANEOUS F.1 CHANGE NOTES
F.1.1 REVISION HISTORY......................................................................................... F-1
F.1.2 CHANGES TO THE L90 MANUAL.................................................................... F-2
F.2 ABBREVIATIONS
F.2.1 STANDARD ABBREVIATIONS ....................................................................... F-14
F.3 WARRANTY
F.3.1 GE MULTILIN WARRANTY............................................................................. F-18

GE Multilin L90 Line Current Differential System 1-1
1 GETTING STARTED 1.1 IMPORTANT PROCEDURES
1
1 GETTING STARTED 1.1IMPORTANT PROCEDURES
Read this chapter to help guide you through the initial setup of your new L90 Line Current Differential System.
1.1.1 CAUTIONS AND WARNINGS
Before attempting to install or use the device, review all safety indicators in this document to help prevent injury,
equipment damage, or downtime.
The following safety and equipment symbols are used in this document.
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a hazardous situation which, if not avoided, could result in minor or moderate
injury.
Indicates practices not related to personal injury.
1.1.2 INSPECTION CHECKLIST
1. Open the relay packaging and inspect the unit for physical damage.
2. View the rear nameplate and verify that the correct model has been ordered and delivered.
Figure 1–1: REAR NAMEPLATE (EXAMPLE)
3. Ensure that the following items are included:
• Instruction manual (if ordered)
• GE EnerVista™ CD (includes the EnerVista UR Setup software and manuals in PDF format)
• Mounting screws
For product information, instruction manual updates, and the latest software updates, visit the GE Digital Energy website at
http://www.gedigitalenergy.com.
If there is any noticeable physical damage, or any of the contents listed are missing, please contact GE Digital
Energy immediately.
GE DIGITAL ENERGY CONTACT INFORMATION AND CALL CENTER FOR PRODUCT SUPPORT:
GE Digital Energy
650 Markland Street
Markham, Ontario
Canada L6C 0M1
TELEPHONE: Worldwide [phone]
Europe/Middle East/Africa [phone]
North America toll-free 1 800 547 8629
FAX: [phone]
EMAIL: [email protected]
HOME PAGE:http://www.gedigitalenergy.com/multilin
NOTE

1-2 L90 Line Current Differential System GE Multilin
1.2 UR OVERVIEW 1 GETTING STARTED
1
1.2UR OVERVIEW 1.2.1 INTRODUCTION TO THE UR
Historically, substation protection, control, and metering functions were performed with electromechanical equipment. This
equipment was gradually replaced by analog equipment, most of which emulated the single-function approach of their elec-
tromechanical precursors. Both technologies required expensive cabling and auxiliary equipment to produce functioning
systems.
Recently, digital electronic equipment has begun to provide protection, control, and metering functions. Initially, this equip-
ment was either single function or had very limited multifunction capability, and it did not significantly reduce the cabling and
auxiliary equipment required. However, recent digital relays are multifunctional, reducing cabling and auxiliaries signifi-
cantly. These devices also transfer data to central control facilities and software using electronic communications. The
functions performed have become so broad that many users now prefer the term Intelligent Electronic Device (IED).
It is obvious to station designers that the amount of cabling and auxiliary equipment installed can be even further reduced,
to 20% to 70% of levels common in 1990, and achieve large cost reductions. This requires placing even more functions
within the IEDs.
Users of power equipment are also interested in reducing cost by improving power quality and personnel productivity, and
in increasing system reliability and efficiency. These objectives are realized through software that is used to perform func-
tions at both the station and supervisory levels. The use of these systems is growing rapidly.
High-speed communication is required to meet the data transfer rates required by modern automatic control and monitoring
systems. Very high speed communications are required to perform protection signaling with a performance target response
time for a command signal between two IEDs, from transmission to reception, of less than 3 milliseconds. This has been
established by the IEC 61850 standard.
IEDs with such capabilities also provide significantly more power system data than was available, enhanced operations and
maintenance, and permit the use of adaptive system configuration for protection and control systems. This new generation
of equipment is easily incorporated into automation systems, at both the station and enterprise levels. The GE Multilin Uni-
versal Relay (UR) series meets these goals.

GE Multilin L90 Line Current Differential System 1-3
1 GETTING STARTED 1.2 UR OVERVIEW
1
1.2.2 HARDWARE ARCHITECTURE
a) UR BASIC DESIGN
The UR is a digital-based device containing a central processing unit (CPU) that handles multiple types of input and output
signals. The UR device can communicate over a local area network (LAN) with an operator interface, a programming
device, or another UR device.
Figure 1–2: UR CONCEPT BLOCK DIAGRAM
The CPU module contains firmware that provides protection elements in the form of logic algorithms, as well as program-
mable logic gates, timers, and latches for control features.
Input elements accept a variety of analog or digital signals from the field. The UR isolates and converts these signals into
logic signals used by the relay.
Output elements convert and isolate the logic signals generated by the relay into digital or analog signals that can be used
to control field devices.
b) UR SIGNAL TYPES
The contact inputs and outputs are digital signals associated with connections to hard-wired contacts. Both ‘wet’ and ‘dry’
contacts are supported.
The virtual inputs and outputs are digital signals associated with UR-series internal logic signals. Virtual inputs include
signals generated by the local user interface. The virtual outputs are outputs of FlexLogic™ equations used to customize
the device. Virtual outputs can also serve as virtual inputs to FlexLogic equations.
The analog inputs and outputs are signals that are associated with transducers, such as Resistance Temperature Detec-
tors (RTDs).
The CT and VT inputs refer to analog current transformer and voltage transformer signals used to monitor AC power lines.
The UR-series relays support 1 A and 5 A CTs.
The remote inputs and outputs provide a means of sharing digital point state information between remote UR-series
devices. The remote outputs interface to the remote inputs of other UR-series devices. Remote outputs are FlexLogic oper-
ands inserted into IEC 61850 GSSE and GOOSE messages.
The direct inputs and outputs provide a means of sharing digital point states between a number of UR-series IEDs over a
dedicated fiber (single or multimode), RS422, or G.703 interface. No switching equipment is required as the IEDs are con-
nected directly in a ring or redundant (dual) ring configuration. This feature is optimized for speed and intended for pilot-
aided schemes, distributed logic applications, or the extension of the input/output capabilities of a single relay chassis.

1-4 L90 Line Current Differential System GE Multilin
1.2 UR OVERVIEW 1 GETTING STARTED
1
c) UR SCAN OPERATION
The UR-series devices operate in a cyclic scan fashion. The device reads the inputs into an input status table, solves the
logic program (FlexLogic equation), and then sets each output to the appropriate state in an output status table. Any result-
ing task execution is priority interrupt-driven.
Figure 1–3: UR-SERIES SCAN OPERATION
1.2.3 SOFTWARE ARCHITECTURE
The firmware (software embedded in the relay) is designed in functional modules that can be installed in any relay as
required. This is achieved with object-oriented design and programming (OOD/OOP) techniques.
Object-oriented techniques involve the use of objects and classes. An object is defined as “a logical entity that contains
both data and code that manipulates that data”. A class is the generalized form of similar objects. By using this concept,
one can create a protection class with the protection elements as objects of the class, such as time overcurrent, instanta-
neous overcurrent, current differential, undervoltage, overvoltage, underfrequency, and distance. These objects represent
completely self-contained software modules. The same object-class concept can be used for metering, input/output control,
software interface, communications, or any functional entity in the system.
Employing OOD/OOP in the software architecture of the L90 achieves the same features as the hardware architecture:
modularity, scalability, and flexibility. The application software for any UR-series device (for example, feeder protection,
transformer protection, distance protection) is constructed by combining objects from the various functional classes. This
results in a common interface across the UR series.
1.2.4 IMPORTANT CONCEPTS
As described above, the architecture of the UR-series relays differ from previous devices. To achieve a general understand-
ing of this device, some sections of Chapter 5 are quite helpful. The most important functions of the relay are contained in
“elements”. A description of the UR-series elements can be found in the Introduction to elements section in chapter 5.
Examples of simple elements, and some of the organization of this manual, can be found in the Control elements section of
chapter 5. An explanation of the use of inputs from CTs and VTs is in the Introduction to AC sources section in chapter 5. A
description of how digital signals are used and routed within the relay is contained in the Introduction to FlexLogic section in
chapter 5.

GE Multilin L90 Line Current Differential System 1-5
1 GETTING STARTED 1.3 ENERVISTA UR SETUP SOFTWARE
1
1.3ENERVISTA UR SETUP SOFTWARE 1.3.1 PC REQUIREMENTS
The faceplate keypad and display or the EnerVista UR Setup software can be used to communicate with the relay. The
EnerVista UR Setup software interface is the preferred method to edit settings and view actual values because the com-
puter monitor can display more information in a simple comprehensible format.
The following minimum requirements must be met for the EnerVista UR Setup software to properly operate on a computer:
• Pentium class or higher processor (Pentium II 300 MHz or higher recommended)
• Windows 95, 98, 98SE, ME, NT 4.0 (Service Pack 4 or higher), 2000, XP
• Internet Explorer 4.0 or higher
• 128 MB of RAM (256 MB recommended)
• 200 MB of available space on system drive and 200 MB of available space on installation drive
• Video capable of displaying 800 x 600 or higher in high-color mode (16-bit color)
• RS232 and/or Ethernet port for communications to the relay
The following qualified modems have been tested to be compliant with the L90 and the EnerVista UR Setup software:
• US Robotics external 56K FaxModem 5686
• US Robotics external Sportster 56K X2
• PCTEL 2304WT V.92 MDC internal modem
1.3.2 INSTALLATION
After ensuring the minimum requirements for using EnerVista UR Setup are met (previous section), install the EnerVista UR
Setup from the GE EnerVista CD. Or download the UR EnerVista software from http://www.gedigitalenergy.com/multilin
and install it.
1. Insert the GE EnerVista CD into your CD-ROM drive.
2. Click the Install Now button and follow the installation instructions to install the EnerVista software.
3. When installation is complete, start the EnerVista Launchpad application.
4. Click the IED Setup section of the Launch Pad window.
5. In the EnerVista Launch Pad window, click the Add Product button and select the appropriate product, shown as fol-
lows. Select the "Web" option to ensure the most recent software release, or select "CD" if you do not have a web con-

1-6 L90 Line Current Differential System GE Multilin
1.3 ENERVISTA UR SETUP SOFTWARE 1 GETTING STARTED
1
nection, then click the Add Now button to list software items for the product. EnerVista Launchpad then obtains the
software from the Internet or CD and automatically starts the installation program.
6. Select the complete path, including the new directory name, where the EnerVista UR Setup is to be installed.
7. Click on Next to begin the installation. The files are installed in the directory indicated, and the installation program
automatically creates icons and adds EnerVista UR Setup to the Windows start menu.
8. Click Finish to complete the installation. The UR-series device is added to the list of installed IEDs in the EnerVista
Launchpad window, as shown.
1.3.3 CONFIGURING THE L90 FOR SOFTWARE ACCESS
a) OVERVIEW
The user can connect remotely to the L90 through the rear RS485 port or the rear Ethernet port with a computer running
the EnerVista UR Setup software. The L90 can also be accessed locally with a laptop computer through the front panel
RS232 port or the rear Ethernet port using the Quick Connect feature.
• To configure the L90 for remote access via the rear RS485 port, see the Configuring Serial Communications section.

GE Multilin L90 Line Current Differential System 1-7
1 GETTING STARTED 1.3 ENERVISTA UR SETUP SOFTWARE
1
• To configure the L90 for remote access via the rear Ethernet port, see the Configuring Ethernet Communications sec-
tion. An Ethernet module must be specified at the time of ordering.
• To configure the L90 for local access with a laptop through either the front RS232 port or rear Ethernet port, see the
Using the Quick Connect Feature section.
b) CONFIGURING SERIAL COMMUNICATIONS
Before starting, verify that the serial cable is properly connected to the RS485 terminal on the back of the device. The face-
plate RS232 port is intended for local use and is not described in this section; see the Using the Quick Connect Feature
section.
A GE Multilin F485 converter (or compatible RS232-to-RS485 converter) is required. Refer to the F485 instruction manual
for details.
1. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista CD or
online from http://www.gedigitalenergy.com/multilin). See the Software Installation section if not already installed.
2. Select the “UR” device from the EnerVista Launchpad to start EnerVista UR Setup.
3. Click the Device Setup button to open the Device Setup window and click the Add Site button to define a new site.
4. Enter a site name in the “Site Name” field. Optionally add a short description of the site along with the display order of
devices defined for the site. In this example, we use “Location 1” as the site name. Click the OK button when complete.
The new site appears in the upper-left list in the EnerVista UR Setup window.
5. Click the Device Setup button, then select the new site to re-open the Device Setup window.
6. Click the Add Device button to define the new device.
7. Enter a name in the "Device Name” field and a description (optional) of the site.
8. Select “Serial” from the Interface drop-down list. This displays a number of interface parameters that must be entered
for serial communications.
Figure 1–4: CONFIGURING SERIAL COMMUNICATIONS
9. Enter the relay slave address, COM port, baud rate, and parity settings from the SETTINGS PRODUCT SETUP  COM-
MUNICATIONS  SERIAL PORTS menu in their respective fields.

1-8 L90 Line Current Differential System GE Multilin
1.3 ENERVISTA UR SETUP SOFTWARE 1 GETTING STARTED
1
10. Click the Read Order Code button to connect to the L90 device and upload the order code. If a communications error
occurs, ensure that the EnerVista UR Setup serial communications values entered in the previous step correspond to
the relay setting values.
11. Click the OK button when the relay order code has been received. The new device is added to the Site List window (or
Online window) located in the top left corner of the main EnerVista UR Setup window.
The device has now been configured for RS232 communications. Proceed to the Connecting to the L90 section to begin
communication.
c) CONFIGURING ETHERNET COMMUNICATIONS
Before starting, verify that the Ethernet network cable is properly connected to the Ethernet port on the back of the relay. To
setup the relay for Ethernet communications, you define a Site, then add the relay as a Device at that site.The computer
and UR device must be on the same subnet.
1. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista CD or
online from http://www.gedigitalenergy.com/multilin). See the Software Installation section for installation details.
2. Select the “UR” device from the EnerVista Launchpad to start EnerVista UR Setup.
3. Click the Device Setup button to open the Device Setup window, then click the Add Site button to define a new site.
4. Enter the desired site name in the “Site Name” field. If desired, a short description of site can also be entered along
with the display order of devices defined for the site. In this example, we use “Location 2” as the site name. Click the
OK button when complete.
5. The new site appears in the upper-left list in the EnerVista UR Setup window. Click the Device Setup button then
select the new site to re-open the Device Setup window.
6. Click the Add Device button to define the new device.
7. Enter the desired name in the “Device Name” field and a description (optional) of the site.
8. Select “Ethernet” from the Interface drop-down list. This displays a number of interface parameters that must be
entered for proper Ethernet functionality.
Figure 1–5: CONFIGURING ETHERNET COMMUNICATIONS
9. Enter the relay IP address specified in the SETTINGS PRODUCT SETUP  COMMUNICATIONS  NETWORK IP
ADDRESS in the “IP Address” field.

GE Multilin L90 Line Current Differential System 1-9
1 GETTING STARTED 1.3 ENERVISTA UR SETUP SOFTWARE
1
10. Enter the relay slave address and Modbus port address values from the respective settings in the SETTINGS PROD-
UCT SETUP  COMMUNICATIONS  MODBUS PROTOCOL menu.
11. Click the Read Order Code button to connect to the L90 device and upload the order code. If an communications error
occurs, ensure that the three EnerVista UR Setup values entered in the previous steps correspond to the relay setting
values.
12. Click OK when the relay order code has been received. The new device is added to the Site List window (or Online
window) located in the top left corner of the main EnerVista UR Setup window.
The Site Device has now been configured for Ethernet communications. Proceed to the Connecting to the L90 section to
begin communications.
1.3.4 USING THE QUICK CONNECT FEATURE
a) USING QUICK CONNECT VIA THE FRONT PANEL RS232 PORT
Before starting, verify that the serial cable is properly connected from the computer to the front panel RS232 port with a
straight-through 9-pin to 9-pin RS232 cable.
1. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista CD or
online from http://www.gedigitalenergy.com/multilin). See the Software Installation section if not already installed.
2. Select the “UR” device from the EnerVista Launchpad to start EnerVista UR Setup.
3. Click the Quick Connect button to open the Quick Connect dialog box.
4. Select the Serial interface and the correct COM Port, then click Connect.
5. The EnerVista UR Setup software creates a site named “Quick Connect” with a corresponding device also named
“Quick Connect” and displays them at the upper-left of the screen. Expand the sections to view data directly from the
L90 device.
Each time that the EnerVista UR Setup software is initialized, click the Quick Connect button to establish direct communi-
cations to the L90 device. This ensures that configuration of the EnerVista UR Setup software matches the L90 model num-
ber.
b) USING QUICK CONNECT VIA THE REAR ETHERNET PORTS
To use the Quick Connect feature to access the L90 from a computer through Ethernet, first assign an IP address to the
relay from the front panel keyboard.
1. Press the MENU key until the SETTINGS menu displays.
2. Navigate to the SETTINGS PRODUCT SETUP  COMMUNICATIONS  NETWORK IP ADDRESS setting.
3. Enter an IP address, for example “1.1.1.1,” and select the ENTER key to save the value.
4. In the same menu, select the SUBNET IP MASK setting.
5. Enter a subnet IP address, for example “255.0.0.0,” and press the ENTER key to save the value.

1-10 L90 Line Current Differential System GE Multilin
1.3 ENERVISTA UR SETUP SOFTWARE 1 GETTING STARTED
1
Next, use an Ethernet cross-over cable to connect the computer to the rear Ethernet port. In case you need it, the figure
shows the pinout for an Ethernet cross-over cable.
Figure 1–6: ETHERNET CROSS-OVER CABLE PIN LAYOUT
Now, assign the computer an IP address compatible with the relay’s IP address.
1. From the Windows desktop, right-click the My Network Places icon and select Properties to open the network con-
nections window.
2. Right-click the Local Area Connection icon and select Properties.
842799A1.CDR
END 1 END 2
Pin Wire color Diagram Pin Wire color Diagram
1 White/orange 1 White/green
2 Orange 2 Green
3 White/green 3 White/orange
4 Blue 4 Blue
5 White/blue 5 White/blue
6 Green 6 Orange
7 White/brown 7 White/brown
8 Brown 8 Brown
1
23456
7
8