ABB RELION 670 SERIES REG670 - Page 15

Negativ sequence time overcurrent protection for machines
NS2PTOC (46I2)..................................................................................
417
Identification
.................................................................................... 417
Application....................................................................................... 418
Features..................................................................................... 418
Generator continuous unbalance current capability................... 419
Setting guidelines............................................................................ 421
Operate time characteristic.........................................................422
Pickup sensitivity........................................................................ 423
Alarm function.............................................................................423
Accidental energizing protection for synchronous generator
AEGPVOC (50AE)................................................................................424
Identification.................................................................................... 424
Application....................................................................................... 424
Setting guidelines............................................................................ 424
Voltage-restrained time overcurrent protection VRPVOC (51V)...........426
Identification.................................................................................... 426
Application....................................................................................... 426
Base quantities........................................................................... 427
Application possibilities...............................................................427
Undervoltage seal-in...................................................................427
Setting guidelines............................................................................ 428
Explanation of the setting parameters........................................ 428
Voltage-restrained overcurrent protection for generator and
step-up transformer.................................................................... 429
General settings......................................................................... 430
Overcurrent protection with undervoltage seal-in....................... 431
Generator stator overload protection GSPTTR (49S)...........................432
Identification.................................................................................... 432
Application....................................................................................... 432
Generator rotor overload protection GRPTTR (49R)............................432
Identification.................................................................................... 433
Application....................................................................................... 433
Setting guideline.............................................................................. 433
Section 10 Voltage protection............................................................. 437
Two step undervoltage protection UV2PTUV (27)................................437
Identification.................................................................................... 437
Application....................................................................................... 437
Setting guidelines............................................................................ 438
Equipment protection, such as for motors and generators.........438
Table of contents
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 9
Application manual