ABB REB670 Applications Manual page 10

Table of contents
4
Four step phase overcurrent protection OC4PTOC(51/67).................. 161
Identification.................................................................................... 161
Application....................................................................................... 161
Setting guidelines............................................................................ 162
Settings for each step.................................................................164
2nd harmonic restrain.................................................................168
Four step single phase overcurrent protection PH4SPTOC (51)..........174
Identification.................................................................................... 174
Application....................................................................................... 174
Setting guidelines............................................................................ 175
Settings for each step (x = 1-4).................................................. 176
Second harmonic restrain...........................................................178
Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC (51N/67N)...................... 183
Identification.................................................................................... 183
Setting guidelines............................................................................ 183
Settings for each step (x = 1, 2, 3 and 4)................................... 184
Common settings for all steps.................................................... 186
2nd harmonic restrain.................................................................188
Parallel transformer inrush current logic.....................................188
Switch onto fault logic.................................................................189
Four step directional negative phase sequence overcurrent
protection NS4PTOC (46I2)..................................................................190
Identification.................................................................................... 191
Application....................................................................................... 191
Setting guidelines............................................................................ 193
Settings for each step ................................................................193
Common settings for all steps.................................................... 196
Thermal overload protection, two time constants TRPTTR (49)...........197
Identification.................................................................................... 198
Application....................................................................................... 198
Setting guideline.............................................................................. 199
Breaker failure protection CCRBRF(50BF)...........................................201
Identification.................................................................................... 201
Application....................................................................................... 202
Setting guidelines............................................................................ 202
Breaker failure protection, single phase version CCSRBRF (50BF).... 206
Identification.................................................................................... 206
Application....................................................................................... 206
Setting guidelines............................................................................ 206
Application manual