ABB RELION 670 Series Applications Manual page 15

8.3 Instantaneous residual overcurrent protection EFPIOC ...................................................... 402
8.3.1 Identification............................................................................................................................. 403
8.3.2 Application................................................................................................................................. 403
8.3.3 Setting guidelines..................................................................................................................... 403
8.4 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC ..............................................................................................................405
8.4.1 Identification............................................................................................................................. 405
8.4.2 Application................................................................................................................................. 405
8.4.3 Setting guidelines..................................................................................................................... 407
8.4.3.1 Settings for each step (x = 1, 2, 3 and 4)............................................................................407
8.4.3.2 Common settings for all steps........................................................................................... 409
8.4.3.3 2nd harmonic restrain........................................................................................................... 410
8.4.3.4 Parallel transformer inrush current logic.......................................................................... 410
8.4.3.5 Switch onto fault logic...........................................................................................................411
8.4.3.6 Transformer application example.......................................................................................412
8.5 Four step directional negative phase sequence overcurrent protection NS4PTOC ....... 415
8.5.1 Identification.............................................................................................................................. 415
8.5.2 Application.................................................................................................................................. 415
8.5.3 Setting guidelines......................................................................................................................417
8.5.3.1 Settings for each step .......................................................................................................... 417
8.5.3.2 Common settings for all steps............................................................................................419
8.6 Sensitive directional residual overcurrent and power protection SDEPSDE ................... 420
8.6.1 Identification..............................................................................................................................420
8.6.2 Application.................................................................................................................................. 421
8.6.3 Setting guidelines..................................................................................................................... 422
8.7 Thermal overload protection, one time constant, Celsius/Fahrenheit
LCPTTR/LFPTTR.............................................................................................................................429
8.7.1 Identification..............................................................................................................................429
8.7.2 Application..................................................................................................................................429
8.7.3 Setting guideline....................................................................................................................... 430
8.8 Thermal overload protection, two time constants TRPTTR ................................................. 431
8.8.1 Identification.............................................................................................................................. 431
8.8.2 Application.................................................................................................................................. 431
8.8.3 Setting guideline....................................................................................................................... 432
8.9 Breaker failure protection CCRBRF............................................................................................434
8.9.1 Identification..............................................................................................................................434
8.9.2 Application................................................................................................................................. 434
8.9.3 Setting guidelines..................................................................................................................... 434
8.10 Pole discordance protection CCPDSC....................................................................................... 437
8.10.1 Identification..............................................................................................................................437
8.10.2 Application..................................................................................................................................437
8.10.3 Setting guidelines..................................................................................................................... 437
8.11 Directional underpower protection GUPPDUP........................................................................438
8.11.1 Identification..............................................................................................................................438
8.11.2 Application................................................................................................................................. 438
8.11.3 Setting guidelines.....................................................................................................................440
Application manual
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