
9.5.4 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC ...................................................................................................92
9.5.4.1 Function revision history.............................................................................................. 93
9.5.4.2 Four step directional earth fault protection ..................................................................93
9.5.4.3 Four step non-directional earth fault protection ...........................................................93
9.5.4.4 Completing the test...................................................................................................... 93
9.5.5 Thermal overload protection, one time constant, Celsius/Fahrenheit LCPTTR/LFPTTR..94
9.5.5.1 Measuring the operate and time limit of set values......................................................94
9.5.5.2 Completing the test...................................................................................................... 94
9.5.6 Breaker failure protection, phase segregated activation and output CCRBRF ................ 94
9.5.6.1 Function revision history.............................................................................................. 95
9.5.6.2 Checking the phase current operate value, IP> ..........................................................95
9.5.6.3 Checking the residual (earth fault) current operate value IN> set below IP> ..............95
9.5.6.4 Checking the re-trip and back-up times....................................................................... 95
9.5.6.5 Verifying the re-trip mode............................................................................................. 96
9.5.6.6 Verifying the back-up trip mode ...................................................................................96
9.5.6.7 Verifying instantaneous back-up trip at CB faulty condition......................................... 97
9.5.6.8 Verifying the case RetripMode = Contact.....................................................................97
9.5.6.9 Verifying the function mode Current/Contact............................................................... 97
9.5.6.10 Completing the test...................................................................................................... 98
9.5.7 Stub protection STBPTOC................................................................................................ 98
9.5.7.1 Function revision history.............................................................................................. 98
9.5.7.2 Measuring the operate limit of set values.....................................................................98
9.5.7.3 Completing the test...................................................................................................... 99
9.5.8 Overcurrent protection with binary release BRPTOC........................................................99
9.5.8.1 Measuring the operate limit of set values.....................................................................99
9.5.8.2 Completing the test.................................................................................................... 100
9.5.9 Pole discordance protection CCPDSC............................................................................100
9.5.9.1 Verifying the settings.................................................................................................. 100
9.5.9.2 Completing the test.................................................................................................... 101
9.5.10 Broken conductor check BRCPTOC .............................................................................. 101
9.5.10.1 Function revision history............................................................................................ 101
9.5.10.2 Measuring the operate and time limit of set values....................................................101
9.5.10.3 Completing the test.................................................................................................... 101
9.6 Voltage protection..............................................................................................................102
9.6.1 Two step undervoltage protection UV2PTUV .................................................................102
9.6.1.1 Verifying the settings.................................................................................................. 102
9.6.1.2 Completing the test.................................................................................................... 103
9.6.2 Two step overvoltage protection OV2PTOV ...................................................................103
9.6.2.1 Verifying the settings.................................................................................................. 103
9.6.2.2 Extended testing........................................................................................................ 103
9.6.2.3 Completing the test.................................................................................................... 104
9.6.3 Two step residual overvoltage protection ROV2PTOV .................................................. 104
9.6.3.1 Function revision history............................................................................................ 104
9.6.3.2 Verifying the settings.................................................................................................. 104
9.6.3.3 Completing the test.................................................................................................... 104
Table of contents 1MRK 505 395-UEN Rev. G
4Line differential protection RED650
Commissioning manual
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