GE TRANSFORMER MANAGEMENT RELAY 745 User manual

745
TRANSFORMER MANAGEMENT RELAY™
INSTRUCTION MANUAL
Firmware Revision: 280.000
Manual P/N: 1601-0070-B6 (GEK-106292D)
Copyright © 2008 GE Multilin
GE Multilin
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: [phone] Fax: [phone]
Internet: http://www.GEindustrial.com/multilin
Manufactured under an
ISO9001 Registered system.
LISTED
52TL
IND.CONT. EQ.
E83849
745 Transformer Management Relay ™
814768AG.CDR
IN SERVICE
LOCAL
SETPOINT GROUP 2
LOAD-LIMIT
REDUCED
TRIP
SELF-TEST
ERROR
SETPOINT GROUP 3
TRANSFORMER
DE-ENERGIZED
ALARM
PICKUP
TEST MODE
TRANSFORMER
OVERLOAD
SETPOINT GROUP 1 PHASE A
PHASE B
PHASE C
GROUNDMESSAGE
PROGRAM PORT SETPOINT 789
456
12 3
.0HELP
MESSAGE
VALUE
ACTUAL
ESCAPE
ENTER
RESET
NEXT
DIFFERENTIAL
BLOCKED
745 STATUS SYSTEM STATUS CONDITIONS
SETPOINT GROUP 4
g
745 TRANSFORMER
MANAGEMENT RELAY
g
GE Industrial Systems
Title Page
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GE Multilin 745 Transformer Management Relay iii
TABLE OF CONTENTS
1. PRODUCT OVERVIEW 1.1 INTRODUCTION
1.1.1 DESCRIPTION................................................................................................... 1-1
1.1.2 PROTECTION FEATURES SUMMARY ............................................................ 1-1
1.1.3 ORDER CODES ................................................................................................ 1-3
1.2 SPECIFICATIONS
1.2.1 APPLICABILITY ................................................................................................. 1-4
1.2.2 INPUTS .............................................................................................................. 1-4
1.2.3 PROTECTION ELEMENTS ............................................................................... 1-5
1.2.4 OUTPUTS .......................................................................................................... 1-7
1.2.5 MISCELLANEOUS............................................................................................. 1-7
2. GETTING STARTED 2.1 USING THE FRONT PANEL DISPLAY
2.1.1 MANEUVERING ................................................................................................ 2-1
2.1.2 CHANGING SETPOINTS .................................................................................. 2-2
2.2 SECURITY
2.2.1 INSTALLATION.................................................................................................. 2-5
2.2.2 CHANGING THE PASSCODE........................................................................... 2-5
2.2.3 DISABLING AND ENABLING PASSCODE SECURITY .................................... 2-6
3. INSTALLATION 3.1 DRAWOUT CASE
3.1.1 CASE DESCRIPTION........................................................................................ 3-1
3.1.2 PANEL CUTOUT ............................................................................................... 3-1
3.1.3 CASE MOUNTING ............................................................................................. 3-2
3.1.4 UNIT WITHDRAWAL AND INSERTION ............................................................ 3-2
3.2 TYPICAL WIRING
3.2.1 DESCRIPTION................................................................................................... 3-4
3.2.2 REAR TERMINAL LAYOUT............................................................................... 3-4
3.2.3 WIRING DIAGRAMS.......................................................................................... 3-6
3.2.4 PHASE SEQUENCE AND TRANSFORMER POLARITY.................................. 3-8
3.2.5 AC CURRENT TRANSFORMER INPUTS......................................................... 3-8
3.2.6 AC VOLTAGE INPUT ........................................................................................ 3-9
3.2.7 LOGIC INPUTS.................................................................................................. 3-9
3.2.8 CONTROL POWER ......................................................................................... 3-10
3.2.9 ANALOG INPUT .............................................................................................. 3-10
3.2.10 TAP POSITION INPUT .................................................................................... 3-10
3.2.11 RTD DRIVER/SENSOR ................................................................................... 3-11
3.2.12 OUTPUT RELAYS ........................................................................................... 3-11
3.2.13 SOLID STATE TRIP OUTPUT......................................................................... 3-11
3.2.14 ANALOG OUTPUTS ........................................................................................ 3-11
3.2.15 RS485 / RS422 COMMUNICATIONS.............................................................. 3-12
3.2.16 RS232 FRONT PANEL PROGRAM PORT ..................................................... 3-13
3.2.17 IRIG-B .............................................................................................................. 3-14
3.2.18 DIELECTRIC STRENGTH TESTING .............................................................. 3-14
4. HUMAN INTERFACES 4.1 HARDWARE INTERFACE
4.1.1 FRONT PANEL .................................................................................................. 4-1
4.1.2 DISPLAY ............................................................................................................ 4-1
4.1.3 LEDS.................................................................................................................. 4-2
4.1.4 LED INDICATORS ............................................................................................. 4-2
4.1.5 PROGRAM PORT.............................................................................................. 4-3
4.1.6 KEYPAD............................................................................................................. 4-3
4.2 745PC SOFTWARE INTERFACE
4.2.1 OVERVIEW........................................................................................................ 4-5
4.2.2 REQUIREMENTS .............................................................................................. 4-5
4.2.3 TOOLBAR AND MENUS ................................................................................... 4-5
4.2.4 HARDWARE CONFIGURATION ....................................................................... 4-6
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iv 745 Transformer Management Relay GE Multilin
TABLE OF CONTENTS
4.2.5 745PC INSTALLATION ......................................................................................4-8
4.2.6 STARTUP AND COMMUNICATIONS CONFIGURATION.................................4-9
4.2.7 USING 745PC ..................................................................................................4-10
5. SETPOINTS 5.1 OVERVIEW
5.1.1 SETPOINT MESSAGE MAP ..............................................................................5-1
5.1.2 SETPOINT ENTRY.............................................................................................5-4
5.1.3 SETPOINT WRITE ACCESS .............................................................................5-4
5.2 AUTO-CONFIGURATION
5.2.1 INTRODUCTION ................................................................................................5-5
5.2.2 DYNAMIC CT RATIO MISMATCH CORRECTION ............................................5-5
5.2.3 PHASE SHIFTS ON THREE-PHASE TRANSFORMERS..................................5-7
5.2.4 PHASE ANGLE CORRECTION .........................................................................5-8
5.2.5 ZERO-SEQUENCE COMPONENT REMOVAL..................................................5-9
5.2.6 TRANSFORMER TYPES .................................................................................5-10
5.2.7 PHASE SHIFTS................................................................................................5-22
5.3 S1 745 SETUP
5.3.1 PASSCODE ......................................................................................................5-23
5.3.2 PREFERENCES...............................................................................................5-23
5.3.3 COMMUNICATIONS ........................................................................................5-24
5.3.4 DNP COMMUNICATIONS................................................................................5-25
5.3.5 RESETTING .....................................................................................................5-26
5.3.6 CLOCK .............................................................................................................5-26
5.3.7 DEFAULT MESSAGES ....................................................................................5-27
5.3.8 SCRATCHPAD .................................................................................................5-27
5.3.9 INSTALLATION ................................................................................................5-28
5.3.10 UPGRADE OPTIONS .......................................................................................5-28
5.4 S2 SYSTEM SETUP
5.4.1 DESCRIPTION .................................................................................................5-29
5.4.2 TRANSFORMER ..............................................................................................5-29
5.4.3 WINDING..........................................................................................................5-31
5.4.4 ONLOAD TAP CHANGER................................................................................5-32
5.4.5 HARMONICS....................................................................................................5-32
5.4.6 FLEXCURVES™ ..............................................................................................5-33
5.4.7 VOLTAGE INPUT .............................................................................................5-33
5.4.8 AMBIENT TEMPERATURE..............................................................................5-34
5.4.9 ANALOG INPUT ...............................................................................................5-35
5.4.10 DEMAND METERING ......................................................................................5-36
5.4.11 ANALOG OUTPUTS.........................................................................................5-37
5.5 S3 LOGIC INPUTS
5.5.1 DESCRIPTION .................................................................................................5-38
5.5.2 LOGIC INPUTS 1 TO 16 ..................................................................................5-38
5.5.3 VIRTUAL INPUTS ............................................................................................5-38
5.6 S4 ELEMENTS
5.6.1 INTRODUCTION TO ELEMENTS....................................................................5-39
5.6.2 SETPOINT GROUP..........................................................................................5-40
5.6.3 DIFFERENTIAL ELEMENT ..............................................................................5-40
5.6.4 INSTANTANEOUS DIFFERENTIAL.................................................................5-48
5.6.5 PHASE OVERCURRENT.................................................................................5-49
5.6.6 NEUTRAL OVERCURRENT ............................................................................5-56
5.6.7 GROUND OVERCURRENT .............................................................................5-59
5.6.8 RESTRICTED GROUND (DIFFERENTIAL GROUND) ....................................5-62
5.6.9 NEGATIVE SEQUENCE OVERCURRENT......................................................5-65
5.6.10 FREQUENCY ...................................................................................................5-68
5.6.11 OVEREXCITATION ..........................................................................................5-73
5.6.12 HARMONICS....................................................................................................5-77
5.6.13 INSULATION AGING / LOSS OF LIFE ............................................................5-80
5.6.14 ANALOG LEVEL...............................................................................................5-84
5.6.15 CURRENT DEMAND........................................................................................5-85
5.6.16 TRANSFORMER OVERLOAD .........................................................................5-86
5.6.17 TAP CHANGER FAILURE................................................................................5-87
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GE Multilin 745 Transformer Management Relay v
TABLE OF CONTENTS
5.7 S5 OUTPUTS
5.7.1 DESCRIPTION................................................................................................. 5-88
5.7.2 INTRODUCTION TO FLEXLOGIC™............................................................... 5-88
5.7.3 FLEXLOGIC™ RULES .................................................................................... 5-89
5.7.4 OUTPUT RELAYS ........................................................................................... 5-90
5.7.5 TRACE MEMORY............................................................................................ 5-92
5.7.6 VIRTUAL OUTPUTS........................................................................................ 5-93
5.7.7 TIMERS............................................................................................................ 5-93
5.8 S6 TESTING
5.8.1 DESCRIPTION................................................................................................. 5-94
5.8.2 OUTPUT RELAYS ........................................................................................... 5-94
5.8.3 ANALOG OUTPUTS ........................................................................................ 5-94
5.8.4 SIMULATION ................................................................................................... 5-95
5.8.5 FACTORY SERVICE ....................................................................................... 5-98
6. ACTUAL VALUES 6.1 OVERVIEW
6.1.1 MESSAGE MAP................................................................................................. 6-1
6.1.2 DESCRIPTION................................................................................................... 6-2
6.2 A1 STATUS
6.2.1 DATE AND TIME ............................................................................................... 6-3
6.2.2 LOGIC INPUTS.................................................................................................. 6-3
6.2.3 VIRTUAL INPUTS.............................................................................................. 6-3
6.2.4 OUTPUT RELAYS ............................................................................................. 6-3
6.2.5 VIRTUAL OUTPUTS.......................................................................................... 6-4
6.2.6 SELF-TEST ERRORS ....................................................................................... 6-4
6.3 A2 METERING
6.3.1 CURRENT.......................................................................................................... 6-5
6.3.2 HARMONIC CONTENT ..................................................................................... 6-8
6.3.3 FREQUENCY................................................................................................... 6-10
6.3.4 TAP CHANGER ............................................................................................... 6-10
6.3.5 VOLTAGE ........................................................................................................ 6-10
6.3.6 DEMAND.......................................................................................................... 6-10
6.3.7 AMBIENT TEMPERATURE ............................................................................. 6-11
6.3.8 LOSS OF LIFE ................................................................................................. 6-12
6.3.9 ANALOG INPUT .............................................................................................. 6-12
6.3.10 POWER............................................................................................................ 6-12
6.3.11 ENERGY .......................................................................................................... 6-13
6.4 A3 EVENT RECORDER
6.4.1 EVENT DATA CLEAR...................................................................................... 6-14
6.4.2 EVENT RECORDS .......................................................................................... 6-14
6.5 A4 PRODUCT INFO
6.5.1 TECHNICAL SUPPORT .................................................................................. 6-17
6.5.2 REVISION CODES .......................................................................................... 6-17
6.5.3 CALIBRATION ................................................................................................. 6-17
6.6 TARGET AND FLASH MESSAGES
6.6.1 TARGET MESSAGES ..................................................................................... 6-18
6.6.2 SELF-TEST ERRORS ..................................................................................... 6-19
6.6.3 FLASH MESSAGES ........................................................................................ 6-20
7. COMMUNICATIONS 7.1 OVERVIEW
7.1.1 PROTOCOLS..................................................................................................... 7-1
7.1.2 PHYSICAL LAYER............................................................................................. 7-1
7.2 MODBUS PROTOCOL
7.2.1 DESCRIPTION................................................................................................... 7-2
7.2.2 GE MULTILIN MODBUS IMPLEMENTATION................................................... 7-2
7.2.3 ELECTRICAL INTERFACE................................................................................ 7-2
7.2.4 DATA FRAME FORMAT AND DATA RATE ...................................................... 7-2
7.2.5 DATA PACKET FORMAT .................................................................................. 7-3
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vi 745 Transformer Management Relay GE Multilin
TABLE OF CONTENTS
7.2.6 CRC-16 ALGORITHM ........................................................................................7-4
7.2.7 MESSAGE TIMING ............................................................................................7-4
7.3 MODBUS FUNCTIONS
7.3.1 SUPPORTED MODBUS FUNCTIONS...............................................................7-5
7.3.2 EXCEPTION RESPONSES................................................................................7-8
7.3.3 READING THE EVENT RECORDER.................................................................7-8
7.3.4 READING TRACE MEMORY .............................................................................7-9
7.3.5 ACCESSING DATA VIA THE USER MAP .........................................................7-9
7.3.6 FUNCTION CODE SUBSTITUTIONS ..............................................................7-11
7.3.7 MEMORY MAP ORGANIZATION.....................................................................7-12
7.4 MODBUS MEMORY MAP
7.4.1 745 MEMORY MAP..........................................................................................7-13
7.4.2 MEMORY MAP DATA FORMATS....................................................................7-48
7.5 DNP COMMUNICATIONS
7.5.1 DEVICE PROFILE DOCUMENT ......................................................................7-61
7.5.2 IMPLEMENTATION TABLE .............................................................................7-63
7.5.3 DNP POINT LISTS ...........................................................................................7-64
8. COMMISSIONING 8.1 GENERAL
8.1.1 INTRODUCTION ................................................................................................8-1
8.1.2 TESTING PHILOSOPHY ....................................................................................8-1
8.1.3 SAFETY PRECAUTIONS...................................................................................8-2
8.1.4 CONVENTIONS .................................................................................................8-2
8.1.5 TEST EQUIPMENT ............................................................................................8-3
8.2 PRELIMINARY WORK
8.2.1 DESCRIPTION ...................................................................................................8-4
8.2.2 DIELECTRIC STRENGTH TESTING .................................................................8-5
8.3 LOGIC INPUTS AND OUTPUT RELAYS
8.3.1 LOGIC INPUTS ..................................................................................................8-6
8.3.2 OUTPUT RELAYS..............................................................................................8-6
8.4 DISPLAY, METERING, COMMUNICATIONS, AND ANALOG OUTPUTS
8.4.1 DESCRIPTION ...................................................................................................8-7
8.4.2 CURRENT INPUTS ............................................................................................8-7
8.4.3 VOLTAGE INPUT ...............................................................................................8-8
8.4.4 TRANSFORMER TYPE SELECTION ................................................................8-8
8.4.5 AMBIENT TEMPERATURE INPUT....................................................................8-9
8.4.6 ANALOG OUTPUTS.........................................................................................8-11
8.4.7 TAP POSITION.................................................................................................8-11
8.5 PROTECTION SCHEMES
8.5.1 PRECAUTIONS ................................................................................................8-12
8.5.2 HARMONIC RESTRAINED PERCENT DIFFERENTIAL .................................8-12
8.5.3 INSTANTANEOUS DIFFERENTIAL PROTECTION ........................................8-17
8.5.4 PHASE TIME OVERCURRENT .......................................................................8-17
8.5.5 PHASE INSTANTANEOUS OVERCURRENT .................................................8-19
8.5.6 NEUTRAL TIME OVERCURRENT...................................................................8-20
8.5.7 NEUTRAL INSTANTANEOUS OVERCURRENT.............................................8-21
8.5.8 GROUND TIME OVERCURRENT....................................................................8-22
8.5.9 GROUND INSTANTANEOUS OVERCURRENT..............................................8-24
8.5.10 RESTRICTED GROUND FAULT......................................................................8-25
8.5.11 NEGATIVE SEQUENCE TIME OVERCURRENT ............................................8-27
8.5.12 NEGATIVE SEQUENCE INSTANTANEOUS OVERCURRENT ......................8-28
8.5.13 FREQUENCY ...................................................................................................8-29
8.5.14 OVEREXCITATION ..........................................................................................8-34
8.5.15 INSULATION AGING........................................................................................8-35
8.5.16 TAP MONITOR FAILURE.................................................................................8-35
8.6 AUXILIARY PROTECTION AND MONITORING FUNCTIONS
8.6.1 THD LEVEL SCHEME......................................................................................8-36
8.6.2 HARMONIC DERATING FUNCTION ...............................................................8-37
8.6.3 TRANSFORMER OVERLOAD .........................................................................8-37
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GE Multilin 745 Transformer Management Relay vii
TABLE OF CONTENTS
8.7 PLACING THE RELAY INTO SERVICE
8.7.1 PROCEDURE .................................................................................................. 8-38
A. APPENDIX A.1 EU DECLARATION
A.1.1 DECLARATION OF CONFORMITY ..................................................................A-1
A.2 WARRANTY
A.2.1 GE MULTILIN WARRANTY ...............................................................................A-2
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viii 745 Transformer Management Relay GE Multilin
TABLE OF CONTENTS
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GE Multilin 745 Transformer Management Relay 1-1
1 PRODUCT OVERVIEW 1.1 INTRODUCTION
1
1 PRODUCT OVERVIEW 1.1INTRODUCTION 1.1.1 DESCRIPTION
These instructions do not purport to cover all details or variations in equipment nor provide for every possible con-
tingency to be met in connection with installation, operation, or maintenance. Should further information be desired
or should particular problems arise which are not covered sufficiently for the purchaser’s purpose, the matter
should be referred to the General Electric Company.
To the extent required the products described herein meet applicable ANSI, IEEE, and NEMA standards; but no
such assurance is given with respect to local codes and ordinances because they vary greatly.
The 745 Transformer Management Relay™ is a high speed, multi-processor based, three-phase, two or three winding,
transformer management relay intended for the primary protection and management of small, medium and large power
transformers. The 745 combines Percent Differential, Overcurrent, Frequency, and Overexcitation protection elements
along with monitoring of individual harmonics, and THD in one economical package.
The relay provides a variety of adaptive relaying features:
• Adaptive Harmonic Restraint which addresses the problem of false tripping during inrush
• Adaptive Time Overcurrent Elements which will adjust their pickup settings based on the calculated transformer capa-
bility when supplying load currents with high harmonic content
• Multiple Setpoint Groups which allow the user to enter and dynamically select from up to four groups of relay settings
to address the protection requirements of different power system configurations
• Dynamic CT Ratio Mismatch Correction which monitors the on-load tap position and automatically corrects for CT ratio
mismatch
• FlexLogic™ which allows PLC style equations based on logic inputs and protection elements to be assigned to any of
the 745 outputs.
The 745 also includes a powerful testing and simulation feature. This allows the protection engineer the ability to test the
relay operation based on captured or computer generated waveform data which can be converted to a digitized format and
downloaded into the 745’s simulation buffer for “playback”. A Waveform Capture function that records waveform data for
fault, inrush, or alarm conditions is also provided.
The Auto-Configuration function eliminates the need for any special CT connections by having all CTs connected in wye.
1.1.2 PROTECTION FEATURES SUMMARY
SYMBOL COMMON PROTECTION ELEMENT SYMBOL WINDING 1 PROTECTION ELEMENT
59/81-1 Volts-Per-Hertz 1 150/46 Negative Sequence Instantaneous Overcurrent
59/81-2 Volts-Per-Hertz 2 151/46 Negative Sequence Time Overcurrent
81U-1 Underfrequency 1 150P1 Phase Instantaneous Overcurrent 1
81U-2 Underfrequency 2 150P2 Phase Instantaneous Overcurrent 2
81U-R1 Frequency Decay Rate 1 150N1 Neutral (3I0) Instantaneous Overcurrent 1
81U-R2 Frequency Decay Rate 2 150N2 Neutral (3I0) Instantaneous Overcurrent 2
81U-R3 Frequency Decay Rate 3 150G1 Ground Instantaneous Overcurrent 1
81U-R4 Frequency Decay Rate 4 150G2 Ground Instantaneous Overcurrent 2
81-H5 5th Harmonic Level 151P Phase Time Overcurrent
81O Overfrequency 151N Neutral (3I0) Time Overcurrent
87 Differential (Percent) 151G Ground Time Overcurrent
50/87 Instantaneous Differential 187TG Ground Differential (Restricted Ground Fault)
AN-1 Analog Input Level 1 1THD Total Harmonic Distortion Level
AN-2 Analog Input Level 2 1AD Current Demand
Insulation Aging:
• Aging Factor
• Hottest Spot Limit
• Total Accumulated Life
Tap Changer Monitor
NOTE
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1-2 745 Transformer Management Relay GE Multilin
1.1 INTRODUCTION 1 PRODUCT OVERVIEW
1
Figure 1–1: SINGLE LINE DIAGRAM
SYMBOL WINDING 2 PROTECTION ELEMENT SYMBOL WINDING 3 PROTECTION ELEMENT
250/46 Negative Sequence Instantaneous Overcurrent 350/46 Negative Sequence Instantaneous Overcurrent
251/46 Negative Sequence Time Overcurrent 351/46 Negative Sequence Time Overcurrent
250P1 Phase Instantaneous Overcurrent 1 350P1 Phase Instantaneous Overcurrent 1
250P2 Phase Instantaneous Overcurrent 2 350P2 Phase Instantaneous Overcurrent 2
250N1 Neutral (3I0) Instantaneous Overcurrent 1 350N1 Neutral (3I0) Instantaneous Overcurrent 1
250N2 Neutral (3I0) Instantaneous Overcurrent 2 350N2 Neutral (3I0) Instantaneous Overcurrent 2
250G1 Ground Instantaneous Overcurrent 1 351P Phase Time Overcurrent
250G2 Ground Instantaneous Overcurrent 2 351N Neutral (3I0) Time Overcurrent
251P Phase Time Overcurrent 351G Ground Time Overcurrent
251N Neutral (3I0) Time Overcurrent 387TG Ground Differential (Restricted Ground Fault)
251G Ground Time Overcurrent 3THD Total Harmonic Distortion Level
287TG Ground Differential (Restricted Ground Fault) 3AD Current Demand
2THD Total Harmonic Distortion Level
2AD Current Demand
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