ABB RELION 670 Series Applications Manual page 10

Table of contents
7.2.3.1 Settings for each step (x = 1-4).................................................................................................. 156
7.2.3.2 Second harmonic restrain........................................................................................................... 158
7.3 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC (51N/67N).................................................................................................. 163
7.3.1 Identification.....................................................................................................................................163
7.3.2 Setting guidelines............................................................................................................................ 163
7.3.2.1 Settings for each step (x = 1, 2, 3 and 4)...................................................................................163
7.3.2.2 Common settings for all steps...................................................................................................166
7.3.2.3 2nd harmonic restrain.................................................................................................................. 167
7.3.2.4 Parallel transformer inrush current logic................................................................................. 167
7.3.2.5 Switch onto fault logic.................................................................................................................168
7.4 Four step directional negative phase sequence overcurrent protection NS4PTOC (46I2)... 169
7.4.1 Identification.....................................................................................................................................169
7.4.2 Application........................................................................................................................................ 169
7.4.3 Setting guidelines.............................................................................................................................171
7.4.3.1 Settings for each step ................................................................................................................. 171
7.4.3.2 Common settings for all steps................................................................................................... 173
7.5 Thermal overload protection, two time constants TRPTTR (49)................................................ 174
7.5.1 Identification.....................................................................................................................................174
7.5.2 Application.........................................................................................................................................175
7.5.3 Setting guideline.............................................................................................................................. 175
7.6 Breaker failure protection CCRBRF(50BF)....................................................................................... 177
7.6.1 Identification.....................................................................................................................................178
7.6.2 Application.........................................................................................................................................178
7.6.3 Setting guidelines............................................................................................................................ 178
7.7 Breaker failure protection, single phase version CCSRBRF (50BF).............................................181
7.7.1 Identification..................................................................................................................................... 181
7.7.2 Application......................................................................................................................................... 181
7.7.3 Setting guidelines............................................................................................................................ 182
7.8 Directional underpower protection GUPPDUP (37)....................................................................... 184
7.8.1 Identification.....................................................................................................................................184
7.8.2 Application........................................................................................................................................ 184
7.8.3 Setting guidelines............................................................................................................................ 186
7.9 Directional overpower protection GOPPDOP (32)......................................................................... 189
7.9.1 Identification.....................................................................................................................................189
7.9.2 Application........................................................................................................................................ 189
7.9.3 Setting guidelines.............................................................................................................................191
7.10 Capacitor bank protection CBPGAPC...............................................................................................194
7.10.1 Identification.....................................................................................................................................194
7.10.2 Application........................................................................................................................................ 194
7.10.2.1 SCB protection.............................................................................................................................. 196
7.10.3 Setting guidelines............................................................................................................................ 197
7.10.3.1 Restrike detection........................................................................................................................200
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Application manual