
Instantaneous residual overcurrent protection EFPIOC (50N)........ 180
Measuring the trip limit of set values.......................................... 180
Completing the test.....................................................................181
Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC (51N/67N)................. 181
Four step directional ground fault protection.............................. 181
Four step non-directional ground fault protection.......................182
Completing the test.....................................................................182
Four step negative sequence overcurrent protection NS4PTOC
Completing the test.....................................................................183
Sensitive directional residual overcurrent and power protection
SDEPSDE (67N)..............................................................................183
Measuring the trip and time limit for set values.......................... 184
Completing the test.....................................................................190
Thermal overload protection, two time constants TRPTTR (49)..... 190
Checking trip and reset values................................................... 190
Completing the test.....................................................................191
Breaker failure protection, phase segregated activation and
output CCRBRF (50BF)...................................................................191
Checking the phase current trip value,
Pickup_PH.................... 191
Checking the residual (ground fault) current trip value
Pickup_N set below Pickup_PH..................................................192
Checking the re-trip and back-up times......................................192
Verifying the re-trip mode........................................................... 192
Verifying the back-up trip mode..................................................193
Verifying instantaneous back-up trip at CB faulty condition....... 194
Verifying the case
RetripMode = Contact...................................195
Current/Contact..............................195
Completing the test.....................................................................196
Pole discrepancy protection CCPDSC (52PD)................................196
Verifying the settings.................................................................. 196
Completing the test.....................................................................197
Directional underpower protection GUPPDUP (37).........................197
Verifying the settings.................................................................. 197
Completing the test.....................................................................199
Directional overpower protection GOPPDOP (32).......................... 199
Verifying the settings.................................................................. 199
Completing the test.....................................................................200
Broken conductor check BRCPTOC (46)........................................ 200
Measuring the trip and time limit of set values........................... 200
Table of contents
6
Transformer protection RET670 2.2 ANSI
Commissioning manual
Summary of Contents for RELION RET670
Page 1: ...RELION 670 SERIES Transformer protection RET670 Version 2 2 ANSI Commissioning manual...
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