ABB REC670 Applications Manual page 13

Bay control REC670 2.2 ANSI
Application manual
Application....................................................................................... 259
Setting guidelines............................................................................ 260
Overfrequency protection SAPTOF (81)...............................................260
Identification.................................................................................... 261
Application....................................................................................... 261
Setting guidelines............................................................................ 261
Rate-of-change of frequency protection SAPFRC (81)........................ 262
Identification.................................................................................... 262
Application....................................................................................... 262
Setting guidelines............................................................................ 263
Frequency time accumulation protection function FTAQFVR (81A).....264
Identification.................................................................................... 264
Application....................................................................................... 264
Setting guidelines............................................................................ 266
Section 11 Multipurpose protection..................................................... 269
General current and voltage protection CVGAPC................................ 269
Identification.................................................................................... 269
Application....................................................................................... 269
Current and voltage selection for CVGAPC function..................270
Base quantities for CVGAPC function........................................ 273
Application possibilities...............................................................273
Inadvertent generator energization.............................................274
Setting guidelines............................................................................ 275
Directional negative sequence overcurrent protection............... 275
Negative sequence overcurrent protection.................................277
Generator stator overload protection in accordance with IEC
or ANSI standards...................................................................... 280
Open phase protection for transformer, lines or generators
and circuit breaker head flashover protection for generators..... 282
Voltage restrained overcurrent protection for generator and
step-up transformer.................................................................... 283
Loss of excitation protection for a generator.............................. 283
Section 12 System protection and control...........................................287
Multipurpose filter SMAIHPAC..............................................................287
Identification.................................................................................... 287
Application....................................................................................... 287
Setting guidelines............................................................................ 289
Setting example..........................................................................289
Table of contents
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