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

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B.4.2 MODBUS®MEMORY MAP DATA FORMATS................................................B-46
C. UCA/MMS C.1 UCA/MMS OVERVIEW
C.1.1 UCA....................................................................................................................C-1
C.1.2 MMS...................................................................................................................C-1
C.1.3 UCA REPORTING.............................................................................................C-6
D. IEC 60870-5-104 D.1 IEC 60870-5-104 POINTS LIST
D.1.1 INTEROPERABILTY DOCUMENT....................................................................D-1
D.1.2 POINTS LIST ...................................................................................................D-10
E. DNP E.1 DNP DEVICE PROFILE
E.1.1 DNP V3.00 DEVICE PROFILE ..........................................................................E-1
E.2 DNP IMPLEMENTATION TABLE
E.2.1 IMPLEMENTATION TABLE...............................................................................E-4
E.3 DNP POINT LISTS
E.3.1 BINARY INPUT POINTS....................................................................................E-8
E.3.2 BINARY OUTPUT AND CONTROL RELAY OUTPUT ....................................E-13
E.3.3 COUNTERS.....................................................................................................E-14
E.3.4 ANALOG INPUTS............................................................................................E-15
F. MISCELLANEOUS F.1 CHANGE NOTES
F.1.1 REVISION HISTORY.........................................................................................F-1
F.1.2 CHANGES TO L90 MANUAL ............................................................................F-1
F.2 STANDARD ABBREVIATIONS
F.2.1 ABBREVIATIONS ..............................................................................................F-4
F.3 TABLES AND FIGURES
F.3.1 LIST OF TABLES...............................................................................................F-6
F.3.2 LIST OF FIGURES.............................................................................................F-7
F.4 WARRANTY
F.4.1 GE POWER MANAGEMENT WARRANTY.....................................................F-10

viii L90 Line Differential Relay GE Power Management
TABLE OF CONTENTS

GE Power Management L90 Line Differential Relay 1-1
1 GETTING STARTED 1.1 IMPORTANT PROCEDURES
1
1 GETTING STARTED 1.1 IMPORTANT PROCEDURES
Please read this chapter to help guide you through the initial setup of your new relay.
1.1.1 CAUTIONS AND WARNINGS
Before attempting to install or use the relay, it is imperative that all WARNINGS and CAU-
TIONS in this manual are reviewed to help prevent personal injury, equipment damage, and/
or downtime.
1.1.2 INSPECTION CHECKLIST
• Open the relay packaging and inspect the unit for physical damage.
• Check that the battery tab is intact on the power supply module (for more details, see the section BATTERY TAB in this
chapter).
• View the rear name-plate and verify that the correct model has been ordered.
Figure 1–1: REAR NAME-PLATE (EXAMPLE)
• Ensure that the following items are included:
• Instruction Manual
• Products CD (includes URPC software and manuals in PDF format)
• mounting screws
• registration card (attached as the last page of the manual)
• Fill out the registration form and mail it back to GE Power Management (include the serial number located on the rear
nameplate).
• For product information, instruction manual updates, and the latest software updates, please visit the GE Power Man-
agement Home Page.
If there is any noticeable physical damage, or any of the contents listed are missing, please contact GE
Power Management immediately.
GE POWER MANAGEMENT
CONTACT INFORMATION AND CALL CENTER FOR PRODUCT SUPPORT:
GE Power Management
215 Anderson Avenue
Markham, Ontario
Canada L6E 1B3
TELEPHONE: [phone] (North America only)
FAX: [phone]
E-MAIL: [e-mail]
HOME PAGE: http://www.GEindustrial.com/pm
WARNING CAUTION
NOTE

1-2 L90 Line Differential Relay GE Power Management
1.2 UR OVERVIEW 1 GETTING STARTED
11.2 UR OVERVIEW 1.2.1 INTRODUCTION TO THE UR RELAY
Historically, substation protection, control, and metering functions were performed with electromechanical equipment. This
first generation of equipment was gradually replaced by analog electronic equipment, most of which emulated the single-
function approach of their electromechanical precursors. Both of these technologies required expensive cabling and auxil-
iary 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 multi-function capability, and did not significantly reduce the cabling and
auxiliary equipment required. However, recent digital relays have become quite multi-functional, reducing cabling and aux-
iliaries significantly. These devices also transfer data to central control facilities and Human Machine Interfaces using elec-
tronic communications. The functions performed by these products have become so broad that many users now prefer the
term IED (Intelligent Electronic Device).
It is obvious to station designers that the amount of cabling and auxiliary equipment installed in stations can be even further
reduced, to 20% to 70% of the levels common in 1990, to 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
as always, in increasing system reliability and efficiency. These objectives are realized through software which is used to
perform functions at both the station and supervisory levels. The use of these systems is growing rapidly.
High speed communications are required to meet the data transfer rates required by modern automatic control and moni-
toring systems. In the near future, very high speed communications will be 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 5
milliseconds. This has been established by the Electric Power Research Institute, a collective body of many American and
Canadian power utilities, in their Utilities Communications Architecture 2 (MMS/UCA2) project. In late 1998, some Euro-
pean utilities began to show an interest in this ongoing initiative.
IEDs with the capabilities outlined above will also provide significantly more power system data than is presently available,
enhance operations and maintenance, and permit the use of adaptive system configuration for protection and control sys-
tems. This new generation of equipment must also be easily incorporated into automation systems, at both the station and
enterprise levels. The GE Power Management Universal Relay (UR) has been developed to meet these goals.

GE Power Management L90 Line Differential Relay 1-3
1 GETTING STARTED 1.2 UR OVERVIEW
1
1.2.2 UR HARDWARE ARCHITECTURE
Figure 1–2: UR CONCEPT BLOCK DIAGRAM
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 can communicate over a local area network (LAN) with an operator interface, a programming device, or
another UR device.
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 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 UR
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 supports 1 A and 5 A CTs.
The remote inputs and outputs provide a means of sharing digital point state information between remote UR devices.
The remote outputs interface to the remote inputs of other UR devices. Remote outputs are FlexLogic™ operands inserted
into UCA2 GOOSE messages and are of two assignment types: DNA standard functions and USER defined functions.
827822A1.CDR
Input Elements
LAN
Programming
Device Operator
Interface
Contact Inputs Contact Outputs
Virtual Inputs Virtual Outputs
Analog Inputs Analog Outputs
CT Inputs
VT Inputs
Input
Status
Table
Output
Status
Table
Pickup
Dropout
Operate
Protective Elements
Logic Gates
Remote Inputs
Remote Outputs
-DNA
-USER
CPU Module Output Elements

1-4 L90 Line Differential Relay GE Power Management
1.2 UR OVERVIEW 1 GETTING STARTED
1c) UR SCAN OPERATION
Figure 1–3: UR SCAN OPERATION
The UR device operates in a cyclic scan fashion. The UR reads the inputs into an input status table, solves the logic pro-
gram (FlexLogic™ equation), and then sets each output to the appropriate state in an output status table. Any resulting task
execution is priority interrupt-driven.
1.2.3 UR SOFTWARE ARCHITECTURE
The firmware (software embedded in the relay) is designed in functional modules which 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 repre-
sent completely self-contained software modules. The same object-class concept can be used for Metering, I/O Control,
HMI, Communications, or any functional entity in the system.
Employing OOD/OOP in the software architecture of the Universal Relay achieves the same features as the hardware
architecture: modularity, scalability, and flexibility. The application software for any Universal Relay (e.g. Feeder Protection,
Transformer Protection, Distance Protection) is constructed by combining objects from the various functionality classes.
This results in a ’common look and feel’ across the entire family of UR platform-based applications.
1.2.4 IMPORTANT UR CONCEPTS
As described above, the architecture of the UR relay is different from previous devices. In order to achieve a general under-
standing of this device, some sections of Chapter 5 are quite helpful. The most important functions of the relay are con-
tained in "Elements". A description of UR elements can be found in the INTRODUCTION TO ELEMENTS section. An
example of a simple element, and some of the organization of this manual, can be found in the DIGITAL ELEMENTS
MENU section. An explanation of the use of inputs from CTs and VTs is in the INTRODUCTION TO AC SOURCES section.
A description of how digital signals are used and routed within the relay is contained in the INTRODUCTION TO FLEX-
LOGIC™ section.
827823A1.CDR
PKP
DPO
OP
Protective Elements
Protection elements
serviced by sub-scan
Read Inputs
Solve Logic
Set Outputs

GE Power Management L90 Line Differential Relay 1-5
1 GETTING STARTED 1.3 URPC SOFTWARE
1
1.3 URPC SOFTWARE 1.3.1 PC REQUIREMENTS
The Faceplate keypad and display or the URPC software interface can be used to communicate with the relay.
The URPC software interface is the preferred method to edit settings and view actual values because the PC monitor can
display more information in a simple comprehensible format.
The following minimum requirements must be met for the URPC software to properly operate on a PC.
Processor: Intel®Pentium 300 or higher
RAM Memory: 64 MB minimum (128 MB recommended)
Hard Disk: 50 MB free space required before installation of URPC software
O/S: Windows®NT 4.x or Windows®9x/2000
Device: CD-ROM drive
Port: COM1(2) / Ethernet
1.3.2 SOFTWARE INSTALLATION
Refer to the following procedure to install the URPC software:
1. Start the Windows®operating system.
2. Insert the URPC software CD into the CD-ROM drive.
3. If the installation program does not start automatically, choose Run from the Windows® Start menu and type
D:\SETUP.EXE. Press Enter to start the installation.
4. Follow the on-screen instructions to install the URPC software. When the Welcome window appears, click on Next to
continue with the installation procedure.
5. When the Choose Destination Location window appears and if the software is not to be located in the default direc-
tory, click Browse and type in the complete path name including the new directory name.
6. Click Next to continue with the installation procedure.
7. The default program group where the application will be added to is shown in the Select Program Folder window. If it
is desired that the application be added to an already existing program group, choose the group name from the list
shown.
8. Click Next to begin the installation process.
9. To launch the URPC application, click Finish in the Setup Complete window.
10. Subsequently, double click on the URPC software icon to activate the application.
Refer to the HUMAN INTERFACES chapter in this manual and the URPC Software Help program for more
information about the URPC software interface.
NOTE

1-6 L90 Line Differential Relay GE Power Management
1.3 URPC SOFTWARE 1 GETTING STARTED
11.3.3 CONNECTING URPC®WITH THE L90
This section is intended as a quick start guide to using the URPC software. Please refer to the URPC Help File and the
HUMAN INTERFACES chapter for more information.
a) CONFIGURING AN ETHERNET CONNECTION
Before starting, verify that the Ethernet network cable is properly connected to the Ethernet port on the back of the relay.
1. Start the URPC software. Enter the password "URPC" at the login password box.
2. Select the Help > Connection Wizard menu item to open the Connection Wizard. Click "Next" to continue.
3. Click the "New Interface" button to open the Edit New Interface window.
• Enter the desired interface name in the Enter Interface Name field.
• Select the "Ethernet" interface from the drop down list and press "Next" to continue.
4. Click the "New Device" button to open the Edit New Device Window.
• Enter the desired name in the Enter Interface Name field.
• Enter the Modbus address of the relay (from SETTINGS
Ö PRODUCT SETUP ÖØ COMMUNICATIONS ÖØ MODBUS
PROTOCOL
Ö MODBUS SLAVE ADDRESS) in the Enter Modbus Address field.
• Enter the IP address (from SETTINGS
Ö PRODUCT SETUP ÖØ COMMUNICATIONS ÖØ NETWORK Ö IP ADDRESS) in
the Enter TCPIP Address field.
5. Click the "4.1 Read Device Information" button then "OK" when the relay information has been received. Click "Next" to
continue.
6. Click the "New Site" button to open the Edit Site Name window.
• Enter the desired site name in the Enter Site Name field.
7. Click the "OK" button then click "Finish". The new Site List tree will be added to the Site List window (or Online window)
located in the top left corner of the main URPC window.
The Site Device has now been configured for Ethernet communications. Proceed to Section c) CONNECTING TO THE
RELAY below to begin communications.
b) CONFIGURING AN RS232 CONNECTION
Before starting, verify that the RS232 serial cable is properly connected to the RS232 port on the front panel of the relay.
1. Start the URPC software. Enter the password "URPC" at the login password box.
2. Select the Help > Connection Wizard menu item to open the Connection Wizard. Click "Next" to continue.
3. Click the "New Interface" button to open the Edit New Interface window.
• Enter the desired interface name in the Enter Interface Name field.
• Select the "RS232" interface from the drop down list and press "Next" to continue.
4. Click the "New Device" button to open the Edit New Device Window.
• Enter the desired name in the Enter Interface Name field.
• Enter the PC COM port number in the COM Port field.
5. Click "OK" then click "Next" to continue.
6. Click the "New Site" button to open the Edit Site Name window.
• Enter the desired site name in the Enter Site Name field.
7. Click the "OK" button then click "Finish". The new Site List tree will be added to the Site List window (or Online window)
located in the top left corner of the main URPC window.
The Site Device has now been configured for RS232 communications. Proceed to Section c) CONNECTING TO THE
RELAY below to begin communications.

GE Power Management L90 Line Differential Relay 1-7
1 GETTING STARTED 1.3 URPC SOFTWARE
1
c) CONNECTING TO THE RELAY
1. Select the Display Properties window through the Site List tree as shown below:
2. The Display Properties window will open with a flashing status indicator.
• If the indicator is red, click the Connect button (lightning bolt) in the menu bar of the Displayed Properties window.
3. In a few moments, the flashing light should turn green, indicating that URPC is communicating with the relay.
Refer to the HUMAN INTERFACES chapter in this manual and the URPC Software Help program for more
information about the URPC software interface.
NOTE

1-8 L90 Line Differential Relay GE Power Management
1.4 UR HARDWARE 1 GETTING STARTED
11.4 UR HARDWARE 1.4.1 MOUNTING AND WIRING
Please refer to the HARDWARE chapter for detailed relay mounting and wiring instructions. Review all WARNINGS AND
CAUTIONS.
1.4.2 COMMUNICATIONS
The URPC software communicates to the relay via the faceplate RS232 port or the rear panel RS485 / Ethernet ports. To
communicate via the faceplate RS232 port, a standard “straight-through” serial cable is used. The DB-9 male end is con-
nected to the relay and the DB-9 or DB-25 female end is connected to the PC COM1 or COM2 port as described in the
HARDWARE chapter.
Figure 1–4: RELAY COMMUNICATIONS OPTIONS
To communicate through the L90 rear RS485 port from a PC RS232 port, the GE Power Management RS232/RS485 con-
verter box is required. This device (catalog number F485) connects to the computer using a "straight-through" serial cable.
A shielded twisted-pair (20, 22, or 24 AWG) connects the F485 converter to the L90 rear communications port. The con-
verter terminals (+, –, GND) are connected to the L90 communication module (+, –, COM) terminals. Refer to the CPU
COMMUNICATION PORTS section in the HARDWARE chapter for option details. The line should be terminated with an R-
C network (i.e. 120 Ω, 1 nF) as described in the HARDWARE chapter.
1.4.3 FACEPLATE DISPLAY
All messages are displayed on a 2 ×20 character vacuum fluorescent display to make them visible under poor lighting con-
ditions. Messages are displayed in English and do not require the aid of an instruction manual for deciphering. While the
keypad and display are not actively being used, the display will default to defined messages. Any high priority event driven
message will automatically override the default message and appear on the display.