ABB Relion 670 series - Page 12

11.5.3.2 Completing the test.......................................................................................................... 170
11.5.4 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC (51N/67N)......................................................................................170
11.5.4.1 Function revision history...................................................................................................171
11.5.4.2 Four step directional ground fault protection ...................................................................171
11.5.4.3 Four step non-directional ground fault protection ............................................................172
11.5.4.4 Completing the test.......................................................................................................... 172
11.5.5 Four step negative sequence overcurrent protection NS4PTOC (46I2)................................172
11.5.5.1 Function revision history...................................................................................................172
11.5.5.2 Completing the test.......................................................................................................... 173
11.5.6 Sensitive directional residual overcurrent and power protection SDEPSDE (67N)...............173
11.5.6.1 Measuring the trip and time limit for set values................................................................174
11.5.6.2 Completing the test.......................................................................................................... 178
11.5.7 Thermal overload protection, one time constant, Fahrenheit/Celsius LFPTTR/
LCPTTR (26).........................................................................................................................178
11.5.7.1 Measuring the trip and time limit of set values................................................................. 178
11.5.7.2 Completing the test.......................................................................................................... 179
11.5.8 Thermal overload protection, two time constants TRPTTR (49)........................................... 179
11.5.8.1 Checking trip and reset values.........................................................................................179
11.5.8.2 Completing the test.......................................................................................................... 180
11.5.9 Breaker failure protection, phase segregated activation and output CCRBRF (50BF) ........ 180
11.5.9.1 Function revision history...................................................................................................180
11.5.9.2 Checking the phase current trip value, Pickup_PH .........................................................181
11.5.9.3 Checking the residual (ground fault) current trip value Pickup_N set below Pickup_PH 181
11.5.9.4 Checking the re-trip and back-up times............................................................................181
11.5.9.5 Verifying the re-trip mode................................................................................................. 181
11.5.9.6 Verifying the back-up trip mode .......................................................................................182
11.5.9.7 Verifying instantaneous back-up trip at CB faulty condition............................................. 183
11.5.9.8 Verifying the case FunctionMode = CB Pos.....................................................................183
11.5.9.9 Verifying the case RetripMode = Contact.........................................................................183
11.5.9.10 Verifying the caseFunctionMode = Current or CB Pos.....................................................184
11.5.9.11 Verifying the external start signal has timed out...............................................................184
11.5.9.12 Verifying that backup signal is released when STALARM is reset................................... 185
11.5.9.13 Test of FollowStart&Mode behaviour................................................................................185
11.5.9.14 Test of FollowStart behaviour...........................................................................................185
11.5.9.15 Completing the test.......................................................................................................... 185
11.5.10 Stub protection STBPTOC (50STB)......................................................................................185
11.5.10.1 Function revision history...................................................................................................186
11.5.10.2 Measuring the trip limit of set values................................................................................186
11.5.10.3 Completing the test.......................................................................................................... 186
11.5.11 Overcurrent protection with binary release BRPTOC............................................................186
11.5.11.1 Function revision history...................................................................................................187
11.5.11.2 Measuring the operate limit of set values.........................................................................187
Table of contents 1MRK 504 165-UUS Rev. J
6 Transformer protection RET670
Commissioning manual
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