GE UR series User manual

L90 Line Differential Rela
y
UR Series Instruction Manual
L90 Revision: 2.9X
Manual P/N: 1601-0081-B5 (GEK-106231B)
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GE Power Management
GE Power Management
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: [phone] Fax: [phone]
Internet: http://www.GEindustrial.com/pm Manufactured under an
ISO9000 Registered system.
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GE Power Management
ADDENDUM
This Addendum contains information that relates to the L90 relay, version 2.9X. This addendum lists a number of
information items that appear in the instruction manual GEK-106231B (1601-0081-B5) but are not included in the cur-
rent L90 operations.
The following functions/items are not yet available with the current version of the L90 relay:
• Signal Sources SRC 3 to SRC 6 (availability is pending for this release)
NOTE:
• The UCA2 specifications are not yet finalized. There will be changes to the object models described in Appendix
C: UCA/MMS.
GE Power Management
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: [phone] Fax: [phone]
Internet: http://www.GEindustrial.com/pm

GE Power Management L90 Line Differential Relay i
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 RELAY ..............................................................1-2
1.2.2 UR HARDWARE ARCHITECTURE...................................................................1-3
1.2.3 UR SOFTWARE ARCHITECTURE ...................................................................1-4
1.2.4 IMPORTANT UR CONCEPTS........................................................................... 1-4
1.3 URPC SOFTWARE
1.3.1 PC REQUIREMENTS ........................................................................................ 1-5
1.3.2 SOFTWARE INSTALLATION ............................................................................ 1-5
1.3.3 CONNECTING URPC® WITH THE L90............................................................ 1-6
1.4 UR HARDWARE
1.4.1 MOUNTING AND WIRING................................................................................. 1-8
1.4.2 COMMUNICATIONS.......................................................................................... 1-8
1.4.3 FACEPLATE DISPLAY...................................................................................... 1-8
1.5 USING THE RELAY
1.5.1 FACEPLATE KEYPAD....................................................................................... 1-9
1.5.2 MENU NAVIGATION ......................................................................................... 1-9
1.5.3 MENU HIERARCHY ..........................................................................................1-9
1.5.4 RELAY ACTIVATION....................................................................................... 1-10
1.5.5 BATTERY TAB................................................................................................. 1-10
1.5.6 RELAY PASSWORDS..................................................................................... 1-10
1.5.7 FLEXLOGIC™ CUSTOMIZATION................................................................... 1-10
1.5.8 COMMISSIONING...........................................................................................1-10
2. PRODUCT DESCRIPTION 2.1 INTRODUCTION
2.1.1 OVERVIEW........................................................................................................ 2-1
2.1.2 FEATURES........................................................................................................2-2
2.1.3 FUNCTIONALITY...............................................................................................2-3
2.1.4 ORDERING........................................................................................................ 2-4
2.2 PILOT CHANNEL
2.2.1 INTER-RELAY COMMUNICATIONS................................................................. 2-7
2.2.2 CHANNEL MONITOR........................................................................................2-8
2.2.3 LOOPBACK TEST ............................................................................................. 2-8
2.2.4 DIRECT TRANSFER TRIPPING ....................................................................... 2-8
2.3 PROTECTION & CONTROL FUNCTIONS
2.3.1 CURRENT DIFFERENTIAL PROTECTION ......................................................2-9
2.3.2 BACKUP PROTECTION.................................................................................... 2-9
2.3.3 MULTIPLE SETTINGS GROUPS...................................................................... 2-9
2.3.4 USER PROGRAMMABLE LOGIC ..................................................................... 2-9
2.3.5 CONFIGURABLE INPUTS AND OUTPUTS......................................................2-9
2.4 METERING & MONITORING FUNCTIONS
2.4.1 METERING...................................................................................................... 2-10
2.4.2 EVENT RECORDS ..........................................................................................2-10
2.4.3 OSCILLOGRAPHY .......................................................................................... 2-10
2.4.4 CT FAILURE / CURRENT UNBALANCE ALARM ...........................................2-10
2.4.5 TRIP CIRCUIT MONITOR ...............................................................................2-10
2.4.6 SELF TEST...................................................................................................... 2-10
2.5 OTHER FUNCTIONS
2.5.1 ALARMS .......................................................................................................... 2-11
2.5.2 LOCAL USER INTERFACE............................................................................. 2-11
2.5.3 TIME SYNCHRONIZATION.............................................................................2-11
2.5.4 FUNCTION DIAGRAMS ..................................................................................2-11
2.6 TECHNICAL SPECIFICATIONS
2.6.1 PROTECTION ELEMENTS ............................................................................. 2-13
2.6.2 USER PROGRAMMABLE ELEMENTS........................................................... 2-16
2.6.3 MONITORING.................................................................................................. 2-16
2.6.4 METERING...................................................................................................... 2-17

ii L90 Line Differential Relay GE Power Management
TABLE OF CONTENTS
2.6.5 INPUTS.............................................................................................................2-17
2.6.6 POWER SUPPLY.............................................................................................2-18
2.6.7 OUTPUTS.........................................................................................................2-18
2.6.8 COMMUNICATIONS ........................................................................................2-18
2.6.9 INTER-RELAY COMMUNICATIONS................................................................2-19
2.6.10 ENVIRONMENTAL...........................................................................................2-19
2.6.11 TYPE TESTS....................................................................................................2-20
2.6.12 PRODUCTION TESTS.....................................................................................2-20
2.6.13 APPROVALS....................................................................................................2-20
2.6.14 MAINTENANCE................................................................................................2-20
3. HARDWARE 3.1 DESCRIPTION
3.1.1 PANEL CUTOUT................................................................................................3-1
3.1.2 MODULE WITHDRAWAL / INSERTION ............................................................3-4
3.1.3 REAR TERMINAL LAYOUT ...............................................................................3-5
3.1.4 REAR TERMINAL ASSIGNMENTS....................................................................3-5
3.2 WIRING
3.2.1 TYPICAL WIRING DIAGRAM.............................................................................3-6
3.2.2 DIELECTRIC STRENGTH RATINGS AND TESTING........................................3-7
3.2.3 CONTROL POWER............................................................................................3-7
3.2.4 CT/VT MODULES...............................................................................................3-8
3.2.5 CONTACT INPUTS/OUTPUTS........................................................................3-10
3.2.6 TRANSDUCER INPUTS/OUTPUTS.................................................................3-16
3.2.7 RS232 FACEPLATE PROGRAM PORT ..........................................................3-17
3.2.8 CPU COMMUNICATION PORTS.....................................................................3-17
3.2.9 IRIG-B...............................................................................................................3-19
3.3 L90 CHANNEL COMMUNICATION
3.3.1 DESCRIPTION .................................................................................................3-20
3.3.2 FIBER: LED & ELED TRANSMITTERS............................................................3-21
3.3.3 FIBER-LASER TRANSMITTERS .....................................................................3-21
3.3.4 G.703 INTERFACE...........................................................................................3-22
3.3.5 RS422 INTERFACE .........................................................................................3-25
3.3.6 RS422 & FIBER INTERFACE ..........................................................................3-28
3.3.7 G.703 & FIBER INTERFACE............................................................................3-28
4. HUMAN INTERFACES 4.1 URPC®SOFTWARE INTERFACE
4.1.1 GRAPHICAL USER INTERFACE.......................................................................4-1
4.1.2 CREATING A SITE LIST ....................................................................................4-1
4.1.3 URPC®SOFTWARE OVERVIEW......................................................................4-1
4.1.4 URPC®SOFTWARE MAIN WINDOW ...............................................................4-3
4.2 FACEPLATE INTERFACE
4.2.1 FACEPLATE.......................................................................................................4-4
4.2.2 LED INDICATORS..............................................................................................4-5
4.2.3 CUSTOM LABELING OF LEDs..........................................................................4-7
4.2.4 CUSTOMIZING THE DISPLAY MODULE..........................................................4-7
4.2.5 DISPLAY.............................................................................................................4-8
4.2.6 KEYPAD .............................................................................................................4-8
4.2.7 BREAKER CONTROL........................................................................................4-9
4.2.8 MENUS.............................................................................................................4-10
4.2.9 CHANGING SETTINGS ...................................................................................4-11
5. SETTINGS 5.1 OVERVIEW
5.1.1 SETTINGS MAIN MENU ....................................................................................5-1
5.1.2 INTRODUCTION TO ELEMENTS......................................................................5-3
5.1.3 INTRODUCTION TO AC SOURCES..................................................................5-4
5.2 PRODUCT SETUP
5.2.1 PASSWORD SECURITY....................................................................................5-7

GE Power Management L90 Line Differential Relay iii
TABLE OF CONTENTS
5.2.2 DISPLAY PROPERTIES.................................................................................... 5-8
5.2.3 COMMUNICATIONS.......................................................................................... 5-8
5.2.4 MODBUS®USER MAP.................................................................................... 5-15
5.2.5 REAL TIME CLOCK......................................................................................... 5-15
5.2.6 FAULT REPORT..............................................................................................5-15
5.2.7 OSCILLOGRAPHY .......................................................................................... 5-16
5.2.8 DATA LOGGER ............................................................................................... 5-18
5.2.9 DEMAND.......................................................................................................... 5-18
5.2.10 USER-PROGRAMMABLE LEDS..................................................................... 5-20
5.2.11 FLEX STATE PARAMETERS.......................................................................... 5-21
5.2.12 USER-DEFINABLE DISPLAYS .......................................................................5-21
5.2.13 INSTALLATION................................................................................................5-23
5.3 SYSTEM SETUP
5.3.1 AC INPUTS...................................................................................................... 5-24
5.3.2 POWER SYSTEM............................................................................................ 5-25
5.3.3 SIGNAL SOURCES ......................................................................................... 5-26
5.3.4 L90 POWER SYSTEM..................................................................................... 5-28
5.3.5 LINE.................................................................................................................5-30
5.3.6 BREAKERS...................................................................................................... 5-31
5.3.7 FLEXCURVES™.............................................................................................. 5-34
5.4 FLEXLOGIC™
5.4.1 INTRODUCTION TO FLEXLOGIC™...............................................................5-35
5.4.2 FLEXLOGIC™ RULES .................................................................................... 5-43
5.4.3 FLEXLOGIC™ EVALUATION.......................................................................... 5-43
5.4.4 FLEXLOGIC™ PROCEDURE EXAMPLE .......................................................5-43
5.4.5 FLEXLOGIC™ EQUATION EDITOR...............................................................5-48
5.4.6 FLEXLOGIC™ TIMERS...................................................................................5-48
5.4.7 FLEXELEMENTS™ ......................................................................................... 5-49
5.5 GROUPED ELEMENTS
5.5.1 OVERVIEW...................................................................................................... 5-53
5.5.2 SETTING GROUP ........................................................................................... 5-53
5.5.3 LINE DIFFERENTIAL ELEMENTS .................................................................. 5-53
5.5.4 CURRENT DIFFERENTIAL.............................................................................5-54
5.5.5 STUB BUS ....................................................................................................... 5-57
5.5.6 LINE PICKUP................................................................................................... 5-58
5.5.7 DISTANCE....................................................................................................... 5-60
5.5.8 POWER SWING DETECT...............................................................................5-72
5.5.9 LOAD ENCROACHMENT................................................................................5-78
5.5.10 CURRENT ELEMENTS ...................................................................................5-80
5.5.11 INVERSE TIME OVERCURRENT CURVE CHARACTERISTICS ..................5-81
5.5.12 PHASE CURRENT ..........................................................................................5-86
5.5.13 NEUTRAL CURRENT......................................................................................5-92
5.5.14 GROUND CURRENT.......................................................................................5-99
5.5.15 NEGATIVE SEQUENCE CURRENT .............................................................5-101
5.5.16 BREAKER FAILURE......................................................................................5-103
5.5.17 VOLTAGE ELEMENTS.................................................................................. 5-112
5.5.18 PHASE VOLTAGE.........................................................................................5-113
5.5.19 NEUTRAL VOLTAGE ....................................................................................5-115
5.5.20 AUXILIARY VOLTAGE ..................................................................................5-116
5.5.21 SUPERVISING ELEMENTS .......................................................................... 5-118
5.6 CONTROL ELEMENTS
5.6.1 OVERVIEW.................................................................................................... 5-125
5.6.2 SETTING GROUPS.......................................................................................5-125
5.6.3 SYNCHROCHECK.........................................................................................5-126
5.6.4 AUTORECLOSE............................................................................................5-130
5.6.5 DIGITAL ELEMENTS.....................................................................................5-137
5.6.6 DIGITAL COUNTERS....................................................................................5-140
5.6.7 MONITORING ELEMENTS ...........................................................................5-142
5.6.8 BREAKER ARCING CURRENT ....................................................................5-142
5.6.9 CONTINUOUS MONITOR.............................................................................5-144
5.6.10 CT FAILURE DETECTOR .............................................................................5-145
5.6.11 VT FUSE FAILURE........................................................................................5-147
5.6.12 PILOT SCHEMES..........................................................................................5-148
5.7 INPUTS / OUTPUTS
5.7.1 CONTACT INPUTS........................................................................................5-151

iv L90 Line Differential Relay GE Power Management
TABLE OF CONTENTS
5.7.2 VIRTUAL INPUTS ..........................................................................................5-153
5.7.3 UCA SBO TIMER ...........................................................................................5-154
5.7.4 CONTACT OUTPUTS ....................................................................................5-154
5.7.5 VIRTUAL OUTPUTS ......................................................................................5-155
5.7.6 REMOTE DEVICES........................................................................................5-155
5.7.7 REMOTE INPUTS ..........................................................................................5-156
5.7.8 REMOTE OUTPUTS: DNA BIT PAIRS ..........................................................5-157
5.7.9 REMOTE OUTPUTS: UserSt BIT PAIRS.......................................................5-158
5.7.10 DIRECT INPUTS/OUTPUTS..........................................................................5-158
5.7.11 RESETTING ...................................................................................................5-160
5.8 TRANSDUCER I/O
5.8.1 DCMA INPUTS...............................................................................................5-161
5.8.2 RTD INPUTS ..................................................................................................5-162
5.9 TESTING
5.9.1 TEST MODE...................................................................................................5-163
5.9.2 FORCE CONTACT INPUTS...........................................................................5-163
5.9.3 FORCE CONTACT OUTPUTS.......................................................................5-163
5.9.4 CHANNEL TESTS..........................................................................................5-164
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 DIRECT INPUTS ................................................................................................6-4
6.2.5 CONTACT OUTPUTS ........................................................................................6-4
6.2.6 VIRTUAL OUTPUTS ..........................................................................................6-4
6.2.7 AUTORECLOSE.................................................................................................6-5
6.2.8 REMOTE DEVICES STATUS ............................................................................6-5
6.2.9 REMOTE DEVICES STATISTICS......................................................................6-5
6.2.10 CHANNEL TESTS..............................................................................................6-6
6.2.11 DIGITAL COUNTERS.........................................................................................6-7
6.2.12 FLEX STATES....................................................................................................6-7
6.2.13 ETHERNET ........................................................................................................6-7
6.3 METERING
6.3.1 METERING CONVENTIONS .............................................................................6-8
6.3.2 87L DIFFERENTIAL CURRENT.......................................................................6-11
6.3.3 SOURCES........................................................................................................6-12
6.3.4 SYNCHROCHECK ...........................................................................................6-15
6.3.5 TRACKING FREQUENCY................................................................................6-16
6.3.6 FLEXELEMENTS™..........................................................................................6-16
6.3.7 TRANSDUCER I/O...........................................................................................6-17
6.4 RECORDS
6.4.1 FAULT REPORTS............................................................................................6-18
6.4.2 EVENT RECORDS...........................................................................................6-20
6.4.3 OSCILLOGRAPHY...........................................................................................6-20
6.4.4 DATA LOGGER................................................................................................6-20
6.4.5 MAINTENANCE................................................................................................6-21
6.5 PRODUCT INFORMATION
6.5.1 MODEL INFORMATION...................................................................................6-22
6.5.2 FIRMWARE REVISIONS..................................................................................6-22
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.............................................................................................7-1
7.1.4 SET DATE AND TIME........................................................................................7-2
7.1.5 RELAY MAINTENANCE.....................................................................................7-2

GE Power Management L90 Line Differential Relay v
TABLE OF CONTENTS
7.2 TARGETS
7.2.1 TARGETS MENU...............................................................................................7-3
7.2.2 RELAY SELF-TESTS......................................................................................... 7-3
8. THEORY OF OPERATION 8.1 OVERVIEW
8.1.1 INTRODUCTION................................................................................................8-1
8.1.2 ARCHITECTURE............................................................................................... 8-1
8.1.3 REMOVAL OF DECAYING OFFSET................................................................. 8-2
8.1.4 PHASELET COMPUTATION............................................................................. 8-2
8.1.5 ADAPTIVE STRATEGY..................................................................................... 8-3
8.1.6 DISTURBANCE DETECTION............................................................................ 8-3
8.1.7 FAULT DETECTION.......................................................................................... 8-3
8.1.8 CLOCK SYNCHRONIZATION...........................................................................8-5
8.1.9 FREQUENCY TRACKING AND PHASE LOCKING..........................................8-6
8.1.10 FREQUENCY DETECTION............................................................................... 8-6
8.1.11 PHASE DETECTION ......................................................................................... 8-7
8.1.12 PHASE LOCKING FILTER ..............................................................................8-10
8.1.13 CLOCK IMPLEMENTATION............................................................................ 8-12
8.1.14 MATCHING PHASELETS................................................................................8-12
8.1.15 START-UP ....................................................................................................... 8-13
8.1.16 HARDWARE AND COMMUNICATION REQUIREMENTS ............................. 8-13
8.1.17 ON-LINE ESTIMATE OF MEASUREMENT ERRORS ....................................8-13
8.1.18 CT SATURATION DETECTION ...................................................................... 8-14
8.1.19 CHARGING CURRENT COMPENSATION.....................................................8-14
8.1.20 DIFFERENTIAL ELEMENT CHARACTERISTICS...........................................8-16
8.1.21 RELAY SYNCHRONIZATION..........................................................................8-16
8.2 OPERATING CONDITION CALCULATIONS
8.2.1 DEFINITIONS ..................................................................................................8-18
8.2.2 2 TERMINAL MODE ........................................................................................ 8-18
8.2.3 TRIP DECISION EXAMPLE............................................................................. 8-22
8.2.4 TRIP DECISION TEST ....................................................................................8-22
9. APPLICATION OF
SETTINGS 9.1 L90 CT REQUIREMENTS
9.1.1 INTRODUCTION................................................................................................9-1
9.1.2 CALCULATION EXAMPLE 1............................................................................. 9-1
9.1.3 CALCULATION EXAMPLE 2............................................................................. 9-2
9.2 CURRENT DIFFERENTIAL (87L) SETTINGS
9.2.1 INTRODUCTION................................................................................................9-3
9.2.2 CURRENT DIFF PICKUP ..................................................................................9-3
9.2.3 CURRENT DIFF RESTRAINT 1 ........................................................................9-3
9.2.4 CURRENT DIFF RESTRAINT 2 ........................................................................9-3
9.2.5 CURRENT DIFF BREAK PT..............................................................................9-3
9.2.6 CT TAP .............................................................................................................. 9-4
9.3 DISTANCE BACKUP/SUPERVISION
9.3.1 DESCRIPTION................................................................................................... 9-5
9.3.2 PHASE DISTANCE............................................................................................9-6
9.3.3 GROUND DISTANCE........................................................................................9-6
9.4 POTT SIGNALING SCHEME
9.4.1 DESCRIPTION................................................................................................... 9-7
9.5 SERIES COMPENSATED LINES
9.5.1 DISTANCE SETTINGS ON SERIES COMPENSATED LINES .........................9-8
9.6 LINES WITH TAPPED TRANSFORMERS
9.6.1 DESCRIPTION................................................................................................... 9-9
9.6.2 TRANSFORMER LOAD CURRENTS................................................................9-9
9.6.3 FAULTS AT THE LV SIDE OF THE TRANSFORMER(S)...............................9-10
9.6.4 EXTERNAL GROUND FAULTS ......................................................................9-10

vi L90 Line Differential Relay GE Power Management
TABLE OF CONTENTS
10. COMMISSIONING 10.1 PRODUCT SETUP
10.1.1 PRODUCT SETUP...........................................................................................10-1
10.2 SYSTEM SETUP
10.2.1 SYSTEM SETUP..............................................................................................10-8
10.2.2 FLEXCURVE™ A ...........................................................................................10-10
10.2.3 FLEXCURVE™ B ...........................................................................................10-11
10.3 FLEXLOGIC™
10.3.1 FLEXLOGIC™................................................................................................10-12
10.4 GROUPED ELEMENTS
10.4.1 GROUPED ELEMENTS .................................................................................10-21
10.5 CONTROL ELEMENTS
10.5.1 SETTINGS TABLE .........................................................................................10-27
10.6 INPUTS / OUTPUTS
10.6.1 CONTACT INPUTS ........................................................................................10-32
10.6.2 VIRTUAL INPUTS ..........................................................................................10-33
10.6.3 UCA SBO TIMER ...........................................................................................10-33
10.6.4 CONTACT OUTPUTS ....................................................................................10-34
10.6.5 VIRTUAL OUTPUTS ......................................................................................10-35
10.6.6 REMOTE DEVICES........................................................................................10-36
10.6.7 REMOTE INPUTS ..........................................................................................10-37
10.6.8 REMOTE OUTPUTS ......................................................................................10-38
10.6.9 DIRECT MESSAGING....................................................................................10-39
10.6.10 RESETTING ...................................................................................................10-39
10.7 TRANSDUCER I/O
10.7.1 DCMA INPUTS...............................................................................................10-40
10.7.2 RTD INPUTS ..................................................................................................10-41
10.8 TESTING
10.8.1 FORCE CONTACT INPUTS/OUTPUTS.........................................................10-42
10.8.2 CHANNEL TESTS..........................................................................................10-42
10.9 L90 COMMISSIONING TESTS
10.9.1 CHANNEL TESTING......................................................................................10-43
10.9.2 CLOCK SYNCHRONIZATION TESTS...........................................................10-44
10.9.3 CURRENT DIFFERENTIAL............................................................................10-45
10.9.4 LOCAL-REMOTE RELAY TESTS ..................................................................10-46
A. FLEXANALOG
PARAMETERS A.1 PARAMETER LIST
A.1.1 FLEXANALOG PARAMETER LIST...................................................................A-1
B. MODBUS®RTU PROTOCOL B.1 OVERVIEW
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-3
B.2 FUNCTION CODES
B.2.1 SUPPORTED FUNCTION CODES...................................................................B-4
B.2.2 03/04H: READ ACTUAL VALUES/SETTINGS.................................................. B-4
B.2.3 05H: EXECUTE OPERATION...........................................................................B-5
B.2.4 06H: STORE SINGLE SETTING.......................................................................B-5
B.2.5 10H: STORE MULTIPLE SETTINGS ................................................................ B-6
B.2.6 EXCEPTION RESPONSES...............................................................................B-6
B.3 FILE TRANSFERS
B.3.1 OBTAINING UR FILES USING MODBUS®PROTOCOL .................................B-7
B.3.2 MODBUS®PASSWORD OPERATION.............................................................B-8
B.4 MEMORY MAPPING
B.4.1 MODBUS®MEMORY MAP.............................................................................. B-9