GE Multilin 745 - Page 241

745
Motor Management Relay
http://www.GEindustrial.com/multilin
3
GE Multilin
NEUTRAL OVERCURRENT ................................................ 5-56
NEUTRAL TIME OVERCURRENT
setpoints
...................................................................... 5-57
testing .......................................................................... 7-21
NUMERICAL SETPOINTS .................................................... 1-5
O
ONLOAD TAP CHANGER................................................... 5-33
OPERATING TIME ............................................................ 7-13
ORDER CODES .................................................................. 2-3
OUTPUT RELAYS
commissioning
......................................................... 7-5, 7-6
default FlexLogic™ ....................................................... 5-89
description ................................................................... 3-12
setpoints ..............................................................5-88, 5-92
typical wiring................................................................ 3-12
OUTPUTS
specifications
.................................................................. 2-6
OVERCURRENT
ground instantaneous
................................................... 5-60
ground time.................................................................. 5-59
negative sequence instantaneous................................. 5-66
negative sequence time ............................................... 5-65
neutral instantaneous .................................................. 5-58
neutral time ................................................................. 5-57
phase ........................................................................... 5-49
OVERCURRENT CURVES
definite time
................................................................. 5-50
FlexCurves™................................................................. 5-50
IEEE ............................................................................. 5-51
OVEREXCITATION
5th harmonic level
....................................................... 5-71
description ................................................................... 5-71
setpoints ...................................................................... 5-71
volts-per-hertz ............................................................. 5-72
OVERFREQUENCY
testing
.......................................................................... 7-33
OVERVIEW ........................................................................ 2-1
P
PANEL CUTOUT .......................................................... 3-1, 3-2
PASSCODE ...................................................................... 5-24
changing.................................................................. 1-7, 1-8
security ................................................................... 1-7, 1-8
setpoints ...................................................................... 5-24
PERCENT DIFFERENTIAL
dual-slope characteristic
.............................................. 5-43
harmonic restrained ..................................................... 7-11
operating principle ....................................................... 5-42
setpoints ...................................................................... 5-42
zones of protection....................................................... 5-62
PHASE A INDICATOR......................................................... 4-3
PHASE ANGLE CORRECTION ............................................. 5-9
PHASE B INDICATOR......................................................... 4-3
PHASE C INDICATOR ........................................................ 4-3
PHASE INSTANTANEOUS OVERCURRENT
setpoints
...................................................................... 5-55
testing .......................................................................... 7-20
PHASE OVERCURRENT .................................................... 5-49
PHASE SEQUENCE ............................................................. 3-9
PHASE SHIFTS
description
................................................................... 5-23
table ............................................................................. 5-23
three-phase transformers .............................................. 5-7
PHASE TIME OVERCURRENT
setpoints
...................................................................... 5-54
testing .......................................................................... 7-18
PHASORS
ABC sequence
................................................................. 5-8
ACB sequence ................................................................. 5-8
PHONE NUMBERS .............................................................. 1-1
PICKUP INDICATOR........................................................... 4-3
PLACING THE RELAY INTO SERVICE ............................... 7-40
PREFAULT VALUES .......................................................... 5-94
PREFERENCES .................................................................5-24
PROTECTION ELEMENTS
specifications
..................................................................2-5
PROTECTION SCHEMES
5th harmonic
....................................................... 5-71, 7-37
energization detection ..................................................7-16
features ..........................................................................2-2
frequency decay ...........................................................5-68
frequency decay rate ....................................................7-35
ground instantaneous o/c ............................................. 5-60
ground instantaneous overcurrent ....................... 7-25, 7-26
ground time o/c ............................................................5-59
ground time overcurrent...............................................7-23
harmonic restrained percent differential....................... 7-11
instantaneous differential .................................... 5-48, 7-17
insulation aging ............................................................7-37
negative sequence instantaneous o/c ........................... 5-66
negative sequence instantaneous overcurrent.............. 7-30
negative sequence time o/c ..........................................5-65
negative sequence time overcurrent.............................7-28
neutral instantaneous o/c .............................................5-58
neutral instantaneous overcurrent....................... 7-22, 7-23
neutral time o/c ............................................................5-57
neutral time overcurrent...............................................7-21
overfrequency ...............................................................7-33
phase instantaneous o/c ...............................................5-55
phase instantaneous overcurrent.................................. 7-20
phase time o/c ..............................................................5-54
phase time overcurrent ................................................ 7-18
restricted ground ..........................................................5-61
restricted ground fault ......................................... 7-26, 7-27
THD level ............................................................. 5-76, 7-38
underfrequency........................................... 5-67, 7-31, 7-33
volts-per-hertz..................................................... 5-72, 7-36
R
REAR TERMINAL ASSIGNMENTS ........................................3-6
REAR TERMINAL LAYOUT ...................................................3-5
REMOTE RESET MODE .....................................................7-13
RESETTING......................................................................5-27
RESISTANCE GROUNDED WYE WINDING......................... 5-62
RESTRICTED GROUND
implementation
.............................................................5-63
setpoints .......................................................................5-61
settings example ..........................................................5-63
testing ................................................................. 7-26, 7-27
zones of protection .......................................................5-62
RS232 COMMUNICATIONS ...............................................3-14
configuring with enerVista PQMII setup ............... 4-11, 4-13
connections .....................................................................4-7
RS422 COMMUNICATIONS ...................................... 3-13, 3-14
RS485 COMMUNICATIONS ...............................................3-13
configuring with enerVista PQMII setup ............... 4-11, 4-13
connections .....................................................................4-8
RTD
calibration
.............................................................. 7-9, 7-10
driver/sensor ................................................................3-11
measured temperature .................................................7-10
resistance vs. temperature ...........................................5-35
S
S1 745 SETUP .................................................................5-24
S2 SYSTEM SETUP ...........................................................5-30
S3 LOGIC INPUTS............................................................5-38
S4 ELEMENTS ..................................................................5-39
S5 OUTPUTS ....................................................................5-86
S6 TESTING.....................................................................5-91
SALES OFFICE ...................................................................1-1
SCRATCHPAD...................................................................5-28
SELF-TEST ERROR INDICATOR ..........................................4-2
SELF-TEST ERRORS .........................................................6-19
SERVICING ...................................................................... 7-40
SETPOINT ENTRY ........................................................ 4-5, 5-4
SETPOINT GROUP ............................................................ 5-41