ABB Relion 670 series - Page 11

7.4.3 Function block.................................................................................................................................. 235
7.4.4 Signals................................................................................................................................................ 235
7.4.5 Settings..............................................................................................................................................236
7.4.6 Monitored data.................................................................................................................................238
7.4.7 Operation principle..........................................................................................................................238
7.4.7.1 Directional impedance element for mho characteristic ZDMRDIR (21D).......................... 238
7.5 Faulty phase identification with load encroachment FMPSPDIS (21)....................................... 240
7.5.1 Identification.................................................................................................................................... 240
7.5.2 Functionality......................................................................................................................................241
7.5.3 Function block...................................................................................................................................241
7.5.4 Signals................................................................................................................................................ 241
7.5.5 Settings..............................................................................................................................................242
7.5.6 Operation principle..........................................................................................................................243
7.5.6.1 The phase selection function..................................................................................................... 243
7.5.7 Technical data...................................................................................................................................253
7.6 Distance protection zone, quadrilateral characteristic, separate settings ZMRPDIS
(21), ZMRAPDIS (21) and ZDRDIR (21D).............................................................................................254
7.6.1 Identification.................................................................................................................................... 254
7.6.2 Functionality..................................................................................................................................... 254
7.6.3 Function block.................................................................................................................................. 255
7.6.4 Signals................................................................................................................................................ 255
7.6.5 Settings..............................................................................................................................................257
7.6.6 Operation principle..........................................................................................................................259
7.6.6.1 Full scheme measurement..........................................................................................................259
7.6.6.2 Impedance characteristic........................................................................................................... 260
7.6.6.3 Minimum operating current....................................................................................................... 264
7.6.6.4 Measuring principles....................................................................................................................264
7.6.6.5 Directional impedance element for quadrilateral characteristics......................................267
7.6.6.6 Simplified logic diagrams........................................................................................................... 268
7.6.7 Technical data................................................................................................................................... 271
7.7 Phase selection, quadrilateral characteristic with settable angle FRPSPDIS (21)................... 272
7.7.1 Identification.....................................................................................................................................272
7.7.2 Functionality......................................................................................................................................272
7.7.3 Function block...................................................................................................................................273
7.7.4 Signals................................................................................................................................................ 273
7.7.5 Settings..............................................................................................................................................274
7.7.6 Operation principle..........................................................................................................................275
7.7.6.1 Phase-to-ground fault..................................................................................................................277
7.7.6.2 Phase-to-phase fault....................................................................................................................279
7.7.6.3 Three-phase faults....................................................................................................................... 280
7.7.6.4 Load encroachment......................................................................................................................281
7.7.6.5 Minimum operate currents.........................................................................................................285
7.7.6.6 Simplified logic diagrams........................................................................................................... 285
Table of contents
5
Technical manual