100% stator earth fault protection...............................................329
Under impedance protection for generators and transformers
ZGVPDIS..............................................................................................
330
Identification
.................................................................................... 330
Application....................................................................................... 331
Operating zones......................................................................... 332
Zone 1 operation........................................................................ 333
Zone 2 operation........................................................................ 333
Zone 3 operation........................................................................ 334
CT and VT positions................................................................... 335
Undervoltage seal-in function..................................................... 335
Load encroachment for zone 2 and zone 3................................ 335
External block signals.................................................................336
Setting Guidelines........................................................................... 337
General.......................................................................................337
Load encroachment....................................................................338
Under voltage seal-in..................................................................339
Rotor ground fault protection (64R)using CVGAPC............................. 340
Section 9 Current protection..............................................................341
Instantaneous phase overcurrent protection PHPIOC (50).................. 341
Identification.................................................................................... 341
Application....................................................................................... 341
Setting guidelines............................................................................ 342
Meshed network without parallel line..........................................343
Meshed network with parallel line...............................................345
Directional phase overcurrent protection, four steps
OC4PTOC(51_67)................................................................................ 347
Identification.................................................................................... 347
Application....................................................................................... 347
Setting guidelines............................................................................ 348
Settings for each step.................................................................350
Setting example..........................................................................354
Instantaneous residual overcurrent protection EFPIOC (50N)............. 359
Identification.................................................................................... 359
Application....................................................................................... 359
Setting guidelines............................................................................ 359
Directional residual overcurrent protection, four steps EF4PTOC
(51N/67N)............................................................................................. 362
Identification.................................................................................... 362
Application....................................................................................... 363
Table of contents
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 7
Application manual
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