ABB REC670 Applications Manual page 12

Table of contents
6
Disconnected equipment detection............................................ 242
Power supply quality ..................................................................242
Voltage instability mitigation....................................................... 242
Backup protection for power system faults.................................243
Settings for two step undervoltage protection............................ 243
Two step overvoltage protection OV2PTOV (59)................................. 244
Identification.................................................................................... 245
Application....................................................................................... 245
Setting guidelines............................................................................ 246
Equipment protection, such as for motors, generators,
reactors and transformers.......................................................... 246
Equipment protection, capacitors............................................... 246
Power supply quality...................................................................247
High impedance grounded systems........................................... 247
The following settings can be done for the two step
overvoltage protection................................................................ 247
Two step residual overvoltage protection ROV2PTOV (59N)...............249
Identification.................................................................................... 249
Application....................................................................................... 249
Setting guidelines............................................................................ 250
Equipment protection, such as for motors, generators,
reactors and transformersEquipment protection
for transformers.......................................................................... 250
Equipment protection, capacitors............................................... 250
Power supply quality...................................................................251
High impedance grounded systems........................................... 251
Direct grounded system..............................................................252
Settings for two step residual overvoltage protection................. 252
Voltage differential protection VDCPTOV (60)..................................... 254
Identification.................................................................................... 254
Application....................................................................................... 254
Setting guidelines............................................................................ 256
Loss of voltage check LOVPTUV (27).................................................. 258
Identification.................................................................................... 258
Application....................................................................................... 258
Setting guidelines............................................................................ 258
Advanced users settings............................................................ 258
Section 10 Frequency protection.........................................................259
Underfrequency protection SAPTUF (81).............................................259
Identification.................................................................................... 259
Bay control REC670 2.2 ANSI
Application manual