GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 281

memory map data formats
memory map organization
supported function codes
.......................................................................... 7-9
user map
N
NEGATIVE SEQUENCE INSTANTANEOUS OVERCURRENT
........................................................................ 5-67
setpoints
........................................................................... 8-28
testing
NEGATIVE SEQUENCE OVERCURRENT ......................... 5-65
NEGATIVE SEQUENCE TIME OVERCURRENT
setpoints ........................................................................ 5-66
........................................................................... 8-27
testing
NEUTRAL INSTANTANEOUS OVERCURRENT
........................................................................ 5-58
setpoints
testing ...................................................................8-21, 8-22
NEUTRAL OVERCURRENT .............................................. 5-56
NEUTRAL TIME OVERCURRENT
setpoints ........................................................................ 5-57
........................................................................... 8-20
testing
NEXT KEY ......................................................................... 4-4
NUMBER KEYS ................................................................. 4-4
NUMERICAL SETPOINTS .................................................. 2-2
O
ONLOAD TAP CHANGER .........................................5-32, 6-10
OPERATING TIME ........................................................... 8-13
ORDER CODES ................................................................. 1-3
OUTPUT RELAYS
actual values .................................................................... 6-3
.................................................................. 8-6
commissioning
.......................................................... 5-91
default FlexLogic™
..................................................................... 3-11
description
................................................................5-90, 5-94
setpoints
typical wiring .................................................................. 3-11
OUTPUTS
.................................................................... 1-7
specifications
OVERCURRENT
...................................................... 5-61
ground instantaneous
ground time .................................................................... 5-60
negative sequence instantaneous
................................................... 5-66
negative sequence time
...................................................... 5-58
neutral instantaneous
.................................................................... 5-57
neutral time
phase ............................................................................ 5-49
OVERCURRENT CURVE TYPES ...................................... 5-49
OVERCURRENT CURVES
definite time ................................................................... 5-53
.................................................................. 5-53
FlexCurves™
............................................................................... 5-52
IAC
............................................................................... 5-51
IEC
.............................................................................. 5-50
IEEE
OVEREXCITATION
........................................................... 5-74
5th harmonic level
..................................................................... 5-73
description
........................................................................ 5-74
setpoints
volts-per-hertz ................................................................ 5-75
OVERFREQUENCY
........................................................................... 8-31
testing
OVERVIEW ....................................................................... 1-1
P
PANEL CUTOUT ................................................................ 3-1
PASSCODE
................................................................... 2-5, 2-6
changing
..................................................................... 2-5, 2-6
security
........................................................................ 5-23
setpoints
PERCENT DIFFERENTIAL
GE Multilin
Courtesy of NationalSwitchgear.com
................................................ 7-48
................................................ 7-12
................................................... 7-5
...................................... 5-67
745 Transformer Management Relay
................................................... 5-42
dual-slope characteristic
......................................................... 8-12
harmonic restrained
........................................................... 5-41
operating principle
........................................................................ 5-41
setpoints
zones of protection .......................................................... 5-63
PHASE A INDICATOR ........................................................ 4-3
PHASE ANGLE CORRECTION ........................................... 5-8
PHASE B INDICATOR ........................................................ 4-3
PHASE C INDICATOR ........................................................ 4-3
PHASE INSTANTANEOUS OVERCURRENT
........................................................................ 5-55
setpoints
................................................................... 8-19, 8-20
testing
PHASE OVERCURRENT .................................................. 5-49
PHASE SEQUENCE ........................................................... 3-8
PHASE SHIFTS
...................................................................... 5-22
description
.............................................................................. 5-22
table
three-phase transformers .................................................... 5-7
PHASE TIME OVERCURRENT
........................................................................ 5-53
setpoints
............................................................................ 8-17
testing
PHASORS
.................................................................. 5-7
ABC sequence
.................................................................. 5-8
ACB sequence
PICKUP INDICATOR .......................................................... 4-3
PLACING THE RELAY INTO SERVICE ............................. 8-38
POWER METERING ......................................................... 6-12
PREFAULT VALUES ........................................................ 5-96
PREFERENCES ............................................................... 5-23
PROTECTION ELEMENTS
.................................................................... 1-5
specifications
PROTECTION SCHEMES
.......................................................... 5-74, 8-34
5th harmonic
...................................................... 8-16
energization detection
............................................................................ 1-1
features
.............................................................. 5-70
frequency decay
frequency decay rate ........................................................ 8-33
.................................................. 5-61
ground instantaneous o/c
ground instantaneous overcurrent
............................................................... 5-60
ground time o/c
.................................................... 8-22
ground time overcurrent
harmonic restrained percent differential
......................................... 5-48, 8-17
instantaneous differential
insulation aging ............................................................... 8-35
negative sequence instantaneous o/c
negative sequence instantaneous overcurrent
............................................... 5-66
negative sequence time o/c
negative sequence time overcurrent
neutral instantaneous o/c .................................................. 5-58
neutral instantaneous overcurrent
neutral time o/c ............................................................... 5-57
.................................................... 8-20
neutral time overcurrent
................................................................. 8-31
overfrequency
................................................... 5-55
phase instantaneous o/c
phase instantaneous overcurrent
phase time o/c ................................................................. 5-53
..................................................... 8-17
phase time overcurrent
............................................................. 5-62
restricted ground
............................................. 8-25, 8-26
restricted ground fault
.............................................................. 5-78, 8-36
THD level
underfrequency ............................................. 5-68, 8-29, 8-31
........................................................ 5-75, 8-34
volts-per-hertz
R
REAR TERMINAL ASSIGNMENTS ...................................... 3-5
REAR TERMINAL LAYOUT ................................................. 3-4
RELAY INSERTION ............................................................ 3-3
RELAY WITHDRAWAL ....................................................... 3-2
REMOTE RESET MODE ................................................... 8-13
RESET KEY ....................................................................... 4-4
RESETTING ..................................................................... 5-26
RESISTANCE GROUNDED WYE WINDING ...................... 5-62
RESTRICTED GROUND
...................................... 8-24
.............................. 8-12
................................. 5-67
..................... 8-28
................................... 8-27
............................. 8-21, 8-22
.............................. 8-19, 8-20
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