ABB RET670 - Page 12

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
(46I2)............................................................................................... 182
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
Verifying the function mode 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