11.4.14.1 Completing the test..................................................................................................................... 156
11.4.15 Phase preference logic PPL2PHIZ................................................................................................. 156
11.4.16 Completing the test.........................................................................................................................157
11.5 Current protection................................................................................................................................157
11.5.1 Instantaneous phase overcurrent protection 3-phase output PHPIOC (50)........................157
11.5.1.1 Measuring the trip limit of set values....................................................................................... 158
11.5.1.2 Completing the test..................................................................................................................... 158
11.5.2 Directional phase overcurrent protection, four steps OC4PTOC (51_67)............................ 158
11.5.2.1 Verifying the settings...................................................................................................................158
11.5.2.2 Completing the test..................................................................................................................... 159
11.5.3 Instantaneous residual overcurrent protection EFPIOC (50N)...............................................159
11.5.3.1 Measuring the trip limit of set values.......................................................................................160
11.5.3.2 Completing the test..................................................................................................................... 160
11.5.4 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC (51N/67N)............................................................................................. 160
11.5.4.1 Four step directional ground fault protection....................................................................... 160
11.5.4.2 Four step non-directional ground fault protection................................................................161
11.5.4.3 Completing the test......................................................................................................................161
11.5.5 Four step negative sequence overcurrent protection NS4PTOC (46I2)................................161
11.5.5.1 Completing the test..................................................................................................................... 162
11.5.6 Sensitive directional residual overcurrent and power protection SDEPSDE (67N)............ 162
11.5.6.1 Measuring the trip and time limit for set values.................................................................... 163
11.5.6.2 Completing the test..................................................................................................................... 167
11.5.7 Thermal overload protection, one time constant, Fahrenheit/Celsius LFPTTR/
LCPTTR (26)....................................................................................................................................... 168
11.5.7.1 Measuring the trip and time limit of set values......................................................................168
11.5.7.2 Completing the test..................................................................................................................... 168
11.5.8 Breaker failure protection, phase segregated activation and output CCRBRF (50BF)..... 169
11.5.8.1 Checking the phase current trip value,
Pickup_PH
................................................................ 169
11.5.8.2 Checking the residual (ground fault) current trip value
Pickup_N
set below
Pickup_PH
....................................................................................................................169
11.5.8.3 Checking the re-trip and back-up times.................................................................................. 169
11.5.8.4 Verifying the re-trip mode...........................................................................................................170
11.5.8.5 Verifying the back-up trip mode................................................................................................ 170
11.5.8.6 Verifying instantaneous back-up trip at CB faulty condition...............................................171
11.5.8.7 Verifying the case
FunctionMode
=
CB Pos
............................................................................. 172
11.5.8.8 Verifying the case
RetripMode
=
Contact
................................................................................ 172
11.5.8.9 Verifying the case
FunctionMode
=
Current
or
CB Pos
........................................................... 172
11.5.8.10 Verifying the external start signal has timed out................................................................... 173
11.5.8.11 Verifying that backup signal is released when STALARM is reset.......................................173
11.5.8.12 Test of
FollowStart&Mode
behaviour....................................................................................... 174
11.5.8.13 Test of
FollowStart
behaviour....................................................................................................174
11.5.8.14 Completing the test..................................................................................................................... 174
Table of contents
Line distance protection REL670 5
Commissioning manual
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