ABB RELION RET670 Applications Manual page 14

Table of contents
8
Application....................................................................................... 345
Load encroachment characteristics.................................................351
Phase-to-ground fault in forward direction..................................352
Phase-to-ground fault in reverse direction..................................354
Phase-to-phase fault in forward direction................................... 355
Setting guidelines............................................................................ 357
Resistive reach with load encroachment characteristic..............358
Minimum operate currents..........................................................359
Phase selection, quad, fixed angle, load encroachment
FDPSPDIS (21).................................................................................... 359
Identification.................................................................................... 359
Identification............................................................................... 359
Application....................................................................................... 359
Setting guidelines............................................................................ 360
Load encroachment characteristics............................................360
Resistive reach with load encroachment characteristic..............366
Minimum operate currents..........................................................367
High speed distance protection ZMFPDIS (21).................................... 367
Identification.................................................................................... 367
Application....................................................................................... 368
System grounding.......................................................................368
Fault infeed from remote end..................................................... 371
Load encroachment....................................................................372
Short line application.................................................................. 373
Long transmission line application..............................................374
Parallel line application with mutual coupling............................. 375
Tapped line application...............................................................382
Setting guidelines............................................................................ 384
General.......................................................................................384
Setting of zone 1.........................................................................385
Setting of overreaching zone......................................................385
Setting of reverse zone...............................................................386
Setting of zones for parallel line application............................... 387
Setting the reach with respect to load........................................ 388
Zone reach setting lower than minimum load impedance.......... 389
Zone reach setting higher than minimum load impedance.........391
Other settings............................................................................. 392
ZMMMXU settings...................................................................... 395
High speed distance protection for series compensated lines
ZMFCPDIS (21).................................................................................... 396
Transformer protection RET670 2.2 ANSI
Application manual