ABB Relion 670 series - Page 14

Minimum operate currents..........................................................355
High speed distance protection ZMFPDIS (21).................................... 355
Identification.................................................................................... 355
Application....................................................................................... 355
System grounding.......................................................................356
Fault infeed from remote end..................................................... 359
Load encroachment....................................................................360
Short line application.................................................................. 361
Long transmission line application..............................................362
Parallel line application with mutual coupling............................. 363
Tapped line application...............................................................370
Setting guidelines............................................................................ 372
General.......................................................................................372
Setting of zone 1.........................................................................373
Setting of overreaching zone......................................................373
Setting of reverse zone...............................................................374
Setting of zones for parallel line application............................... 375
Setting the reach with respect to load........................................ 376
Zone reach setting lower than minimum load impedance.......... 377
Zone reach setting higher than minimum load impedance.........379
Other settings............................................................................. 380
High speed distance protection for series compensated lines
ZMFCPDIS (21).................................................................................... 383
Identification.................................................................................... 383
Application....................................................................................... 384
System grounding.......................................................................384
Fault infeed from remote end..................................................... 386
Load encroachment....................................................................387
Short line application.................................................................. 388
Long transmission line application..............................................389
Parallel line application with mutual coupling............................. 390
Tapped line application...............................................................398
Series compensation in power systems.......................................... 400
Steady state voltage regulation and increase of voltage
collapse limit............................................................................... 400
Increase in power transfer.......................................................... 402
Voltage and current inversion.....................................................403
Impact of series compensation on protective IED of adjacent
lines............................................................................................ 411
Distance protection.....................................................................413
Table of contents
8 Line distance protection REL670 2.2 ANSI
Application manual