viii
2.11.2 Scheme logic ...................................................................................................................... 182
2.11.3 Setting ................................................................................................................................ 183
2.11.4 Data ID .............................................................................................................................. 183
Distance carrier command protection (DISCAR) .................................................................... 185
2.12.1 Permissive underreach protection (PUP) ......................................................................... 186
2.12.2 Permissive overreach protection (POP) ............................................................................ 187
2.12.3 Unblocking overreach protection (UOP) ........................................................................... 190
2.12.4 Blocking overreach protection (BOP) ............................................................................... 192
2.12.5 Protection for week infeed terminal ................................................................................. 195
2.12.6 Countermeasure for current reversal ............................................................................... 197
2.12.7 Carrier signal reception .................................................................................................... 199
2.12.8 Setting ................................................................................................................................ 201
2.12.9 Data ID .............................................................................................................................. 202
Directional earth fault command protection (DEFCAR) ........................................................ 204
2.13.1 Permissive overreach protection (POP) ............................................................................ 205
2.13.2 Unblocking overreach protection (UOP) ........................................................................... 208
2.13.3 Blocking overreach protection (BOP) ............................................................................... 208
2.13.4 Coordination with DISCAR protection ............................................................................. 210
2.13.5 Carrier signal reception ..................................................................................................... 211
2.13.6 Setting ................................................................................................................................ 213
2.13.7 Data ID .............................................................................................................................. 214
Switch on to fault (SOTF-OC) .................................................................................................. 216
2.14.1 Scheme logic ...................................................................................................................... 217
2.14.2 Setting ................................................................................................................................ 219
2.14.3 Data ID .............................................................................................................................. 219
Overcurrent protection (OC) .................................................................................................... 220
2.15.1 Relay polarity .................................................................................................................... 221
2.15.2 Inverse time and definite time delay characteristic ........................................................ 224
2.15.3 Threshold value for operation ........................................................................................... 231
2.15.4 Reset Ratio ......................................................................................................................... 231
2.15.5 Miscellaneous functions .................................................................................................... 231
2.15.6 Scheme logic ...................................................................................................................... 233
2.15.7 Setting ................................................................................................................................ 235
2.15.8 Data ID .............................................................................................................................. 240
Earth fault protection (EF) ...................................................................................................... 243
2.16.1 Relay polarity .................................................................................................................... 244
2.16.2 Inverse time and definite time delay characteristic ........................................................ 246
2.16.3 Threshold level for operation ............................................................................................ 251
2.16.4 Reset Ratio ......................................................................................................................... 251