GE 745 - Page 311

CHAPTER B: INDEX INDEX
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL vii
specifications ................................................................................................... 2-7
testing ....................................................................................................7-27, 7-28
PHASE OVERCURRENT ....................................................................................5-58
PHASE SEQUENCE ...........................................................................................3-12
PHASE SHIFTS
description.......................................................................................................5-24
table ................................................................................................................5-24
three-phase transformers ................................................................................ 5-8
PHASE TIME OVERCURRENT
setpoints ..........................................................................................................5-63
specifications ................................................................................................... 2-7
testing .............................................................................................................7-25
PHASORS
ABC sequence ................................................................................................... 5-9
ACB sequence ..................................................................................................5-10
PICKUP INDICATOR .......................................................................................... 4-3
PLACING THE RELAY INTO SERVICE ..............................................................7-60
PREFAULT VALUES.........................................................................................5-110
PREFERENCES ..................................................................................................5-25
PROTECTION SCHEMES
5th harmonic ..........................................................................................5-84, 7-53
energization detection ....................................................................................7-22
features ............................................................................................................ 2-2
frequency decay .............................................................................................5-80
frequency decay rate ......................................................................................7-50
ground instantaneous overcurrent ............................................... 5-71, 7-35, 7-36
ground time overcurrent ........................................................................5-70, 7-32
harmonic restrained percent differential ........................................................7-16
instantaneous differential ......................................................................5-57, 7-23
insulation aging ...............................................................................................7-54
negative sequence instantaneous overcurrent......................................5-77, 7-42
negative sequence time overcurrent......................................................5-76, 7-39
neutral instantaneous overcurrent ............................................... 5-68, 7-31, 7-32
neutral time overcurrent ........................................................................5-66, 7-29
overfrequency .................................................................................................7-47
phase instantaneous overcurrent ................................................. 5-65, 7-27, 7-28
phase time overcurrent ..........................................................................5-63, 7-25
restricted ground.............................................................................................5-72
restricted ground fault ...........................................................................7-36, 7-38
specifications ................................................................................................... 2-6
THD level.................................................................................................5-88, 7-56
underfrequency ............................................................................. 5-79, 7-44, 7-47
volts-per-hertz........................................................................................5-85, 7-52
R
REAR TERMINAL ASSIGNMENTS...................................................................... 3-8
REAR TERMINAL LAYOUT ................................................................................. 3-7
REMOTE RESET MODE .....................................................................................7-18
RESETTING........................................................................................................5-29
RESISTANCE GROUNDED WYE WINDING......................................................5-73
RESTRICTED GROUND
implementation ...............................................................................................5-74
setpoints ..........................................................................................................5-72
settings example .............................................................................................5-74
testing ....................................................................................................7-36, 7-38