
11.4.1.3 Completing the test.......................................................................................................... 108
11.4.2 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC (51N/67N)...................................................................................... 108
11.4.2.1 Function revision history...................................................................................................108
11.4.2.2 Four step directional ground fault protection ...................................................................109
11.4.2.3 Four step non-directional ground fault protection ............................................................109
11.4.2.4 Completing the test.......................................................................................................... 109
11.4.3 Four step negative sequence overcurrent protection NS4PTOC (46I2)................................109
11.4.3.1 Function revision history...................................................................................................109
11.4.3.2 Completing the test...........................................................................................................110
11.4.4 Sensitive directional residual overcurrent and power protection SDEPSDE (67N)............... 111
11.4.4.1 Measuring the trip and time limit for set values................................................................ 111
11.4.4.2 Completing the test...........................................................................................................115
11.4.5 Thermal overload protection, one time constant, Fahrenheit/Celsius LFPTTR/
LCPTTR (26)......................................................................................................................... 115
11.4.5.1 Measuring the trip and time limit of set values................................................................. 115
11.4.5.2 Completing the test...........................................................................................................116
11.4.6 Directional underpower protection GUPPDUP (37)...............................................................116
11.4.6.1 Verifying the settings........................................................................................................ 116
11.4.6.2 Completing the test...........................................................................................................118
11.4.7 Directional overpower protection GOPPDOP (32).................................................................118
11.4.7.1 Verifying the settings........................................................................................................ 118
11.4.7.2 Completing the test...........................................................................................................118
11.5 Voltage protection.................................................................................................................... 119
11.5.1 Two step undervoltage protection UV2PTUV (27).................................................................119
11.5.1.1 Verifying the settings........................................................................................................ 119
11.5.1.2 Completing the test.......................................................................................................... 120
11.5.2 Two step overvoltage protection OV2PTOV (59).................................................................. 120
11.5.2.1 Verifying the settings........................................................................................................ 120
11.5.2.2 Extended testing...............................................................................................................121
11.5.2.3 Completing the test.......................................................................................................... 121
11.6 Frequency protection...............................................................................................................121
11.6.1 Underfrequency protection SAPTUF (81)............................................................................. 121
11.6.1.1 Verifying the settings........................................................................................................ 121
11.6.1.2 Completing the test.......................................................................................................... 122
11.6.2 Overfrequency protection SAPTOF (81)............................................................................... 122
11.6.2.1 Verifying the settings........................................................................................................ 122
11.6.2.2 Completing the test.......................................................................................................... 123
11.6.3 Rate-of-change frequency protection SAPFRC (81)............................................................. 123
11.6.3.1 Verifying the settings........................................................................................................ 123
11.6.3.2 Completing the test.......................................................................................................... 123
11.6.4 Frequency time accumulation protection function FTAQFVR (81A) .....................................124
11.6.4.1 Verifying the settings........................................................................................................ 124
Table of contents 1MRK 511 409-UUS Rev. K
4Phasor measurement unit RES670
Commissioning manual
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