ABB RELION 670 SERIES REG670 - Page 16

Disconnected equipment detection............................................ 438
Power supply quality
..................................................................438
Voltage instability mitigation
....................................................... 438
Backup protection for power system faults.................................439
Settings for two step undervoltage protection............................ 439
Two step overvoltage protection OV2PTOV (59)................................. 440
Identification.................................................................................... 441
Application....................................................................................... 441
Setting guidelines............................................................................ 442
Equipment protection, such as for motors, generators,
reactors and transformers.......................................................... 442
Equipment protection, capacitors............................................... 442
Power supply quality...................................................................443
High impedance grounded systems........................................... 443
The following settings can be done for the two step
overvoltage protection................................................................ 443
Two step residual overvoltage protection ROV2PTOV (59N)...............445
Identification.................................................................................... 445
Application....................................................................................... 445
Setting guidelines............................................................................ 446
Equipment protection, such as for motors, generators,
reactors and transformersEquipment protection
for transformers.......................................................................... 446
Equipment protection, capacitors............................................... 446
Stator ground-fault protection based on residual voltage
measurement..............................................................................446
Power supply quality...................................................................450
High impedance grounded systems........................................... 450
Direct grounded system..............................................................451
Settings for two step residual overvoltage protection................. 452
Overexcitation protection OEXPVPH (24)............................................ 454
Identification.................................................................................... 454
Application....................................................................................... 454
Setting guidelines............................................................................ 456
Recommendations for input and output signals......................... 456
Settings.......................................................................................457
Service value report....................................................................458
Setting example..........................................................................458
Voltage differential protection VDCPTOV (60)..................................... 460
Identification.................................................................................... 460
Application....................................................................................... 460
Table of contents
10 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual