ABB Relion REC670 Applications Manual page 9

7.2.2 Application..................................................................................................................................105
7.2.3 Setting guidelines..................................................................................................................... 106
7.2.3.1 Settings for each step........................................................................................................... 107
7.2.3.2 2nd harmonic restrain........................................................................................................... 110
7.3 Instantaneous residual overcurrent protection EFPIOC ....................................................... 114
7.3.1 Identification...............................................................................................................................115
7.3.2 Application.................................................................................................................................. 115
7.3.3 Setting guidelines...................................................................................................................... 115
7.4 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC ............................................................................................................... 117
7.4.1 Identification...............................................................................................................................117
7.4.2 Application...................................................................................................................................117
7.4.3 Setting guidelines...................................................................................................................... 119
7.4.3.1 Settings for each step (x = 1, 2, 3 and 4)............................................................................ 119
7.4.3.2 Common settings for all steps.............................................................................................121
7.4.3.3 2nd harmonic restrain............................................................................................................122
7.4.3.4 Parallel transformer inrush current logic...........................................................................122
7.4.3.5 Switch onto fault logic...........................................................................................................123
7.4.3.6 Line application example...................................................................................................... 124
7.5 Four step directional negative phase sequence overcurrent protection NS4PTOC ....... 128
7.5.1 Identification.............................................................................................................................. 128
7.5.2 Application.................................................................................................................................. 128
7.5.3 Setting guidelines..................................................................................................................... 130
7.5.3.1 Settings for each step .......................................................................................................... 130
7.5.3.2 Common settings for all steps............................................................................................ 132
7.6 Sensitive directional residual overcurrent and power protection SDEPSDE .................... 133
7.6.1 Identification.............................................................................................................................. 133
7.6.2 Application.................................................................................................................................. 134
7.6.3 Setting guidelines......................................................................................................................135
7.7 Thermal overload protection, one time constant, Celsius/Fahrenheit
LCPTTR/LFPTTR............................................................................................................................. 142
7.7.1 Identification.............................................................................................................................. 142
7.7.2 Application.................................................................................................................................. 142
7.7.3 Setting guideline........................................................................................................................143
7.8 Thermal overload protection, two time constants TRPTTR .................................................144
7.8.1 Identification..............................................................................................................................144
7.8.2 Application..................................................................................................................................144
7.8.3 Setting guideline....................................................................................................................... 145
7.9 Breaker failure protection CCRBRF............................................................................................ 147
7.9.1 Identification.............................................................................................................................. 147
7.9.2 Application.................................................................................................................................. 147
7.9.3 Setting guidelines......................................................................................................................147
7.10 Stub protection STBPTOC ...........................................................................................................150
7.10.1 Identification.............................................................................................................................. 150
7.10.2 Application..................................................................................................................................150
7.10.3 Setting guidelines...................................................................................................................... 151
Application manual
Table of contents
3