ABB Relion 670 Series Applications Manual page 12

Table of contents
8.4 Voltage differential protection VDCPTOV (60)...............................................................................213
8.4.1 Identification..................................................................................................................................... 213
8.4.2 Application.........................................................................................................................................213
8.4.3 Setting guidelines............................................................................................................................ 214
8.5 Loss of voltage check LOVPTUV (27)................................................................................................ 215
8.5.1 Identification..................................................................................................................................... 215
8.5.2 Application.........................................................................................................................................216
8.5.3 Setting guidelines............................................................................................................................ 216
8.5.3.1 Advanced users settings............................................................................................................. 216
Section 9 Frequency protection.......................................................................................... 217
9.1 Underfrequency protection SAPTUF (81)......................................................................................... 217
9.1.1 Identification..................................................................................................................................... 217
9.1.2 Application......................................................................................................................................... 217
9.1.3 Setting guidelines.............................................................................................................................217
9.2 Overfrequency protection SAPTOF (81)........................................................................................... 218
9.2.1 Identification.....................................................................................................................................218
9.2.2 Application.........................................................................................................................................218
9.2.3 Setting guidelines............................................................................................................................ 219
9.3 Rate-of-change frequency protection SAPFRC (81).......................................................................219
9.3.1 Identification.....................................................................................................................................219
9.3.2 Application.........................................................................................................................................219
9.3.3 Setting guidelines............................................................................................................................220
9.4 Frequency time accumulation protection function FTAQFVR (81A)...........................................221
9.4.1 Identification..................................................................................................................................... 221
9.4.2 Application......................................................................................................................................... 221
9.4.3 Setting guidelines............................................................................................................................ 223
Section 10 Multipurpose protection.....................................................................................225
10.1 General current and voltage protection CVGAPC.......................................................................... 225
10.1.1 Identification.....................................................................................................................................225
10.1.2 Application.........................................................................................................................................225
10.1.2.1 Current and voltage selection for CVGAPC function............................................................. 226
10.1.2.2 Base quantities for CVGAPC function...................................................................................... 228
10.1.2.3 Application possibilities..............................................................................................................229
10.1.2.4 Inadvertent generator energization......................................................................................... 229
10.1.3 Setting guidelines............................................................................................................................230
10.1.3.1 Directional negative sequence overcurrent protection........................................................230
10.1.3.2 Negative sequence overcurrent protection.............................................................................232
10.1.3.3 Generator stator overload protection in accordance with IEC or ANSI standards......... 234
10.1.3.4 Open phase protection for transformer, lines or generators and circuit breaker
head flashover protection for generators............................................................................... 236
10.1.3.5 Voltage restrained overcurrent protection for generator and step-up transformer..... 236
10.1.3.6 Loss of excitation protection for a generator........................................................................ 237
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Application manual