ABB Relion 670 series - Page 12

Full-scheme distance protection, quadrilateral for earth faults
ZMMPDIS (21), ZMMAPDIS (21)......................................................... 278
Identification.................................................................................... 278
Application....................................................................................... 278
Introduction.................................................................................278
System grounding.......................................................................279
Fault infeed from remote end..................................................... 282
Load encroachment....................................................................283
Short line application.................................................................. 284
Long transmission line application..............................................285
Parallel line application with mutual coupling............................. 285
Tapped line application...............................................................291
Setting guidelines............................................................................ 294
General.......................................................................................294
Setting of zone1..........................................................................294
Setting of overreaching zone......................................................294
Setting of reverse zone...............................................................295
Setting of zones for parallel line application............................... 296
Setting of reach in resistive direction..........................................297
Load impedance limitation, without load encroachment function298
Load impedance limitation, with load encroachment function
activated..................................................................................... 299
Setting of minimum operating currents.......................................300
Setting of timers for distance protection zones...........................300
Additional distance protection directional function for earth faults
ZDARDIR..............................................................................................300
Identification.................................................................................... 301
Application....................................................................................... 301
Setting guidelines............................................................................ 301
Mho impedance supervision logic ZSMGAPC......................................303
Identification.................................................................................... 303
Application....................................................................................... 303
Setting guidelines............................................................................ 304
Faulty phase identification with load encroachment FMPSPDIS (21).. 305
Identification.................................................................................... 305
Application....................................................................................... 305
Setting guidelines............................................................................ 306
Load encroachment....................................................................307
Distance protection zone, quadrilateral characteristic, separate
settings ZMRPDIS (21), ZMRAPDIS (21) and ZDRDIR (21D)............. 308
Table of contents
6 Line distance protection REL670 2.2 ANSI
Application manual