Load impedance limitation, with Phase selection with
load encroachment, quadrilateral characteristic function
activated .............................................................................. 312
Setting of minimum operating currents.................................312
Setting of timers for distance protection zones.................... 312
Phase selection, quadrilateral characteristic with settable
angle FRPSPDIS............................................................................313
Identification.............................................................................. 313
Application.................................................................................313
Load encroachment characteristics...........................................318
Phase-to-earth fault in forward direction.............................. 319
Phase-to-earth fault in reverse direction.............................. 321
Phase-to-phase fault in forward direction.............................322
Setting guidelines...................................................................... 324
Resistive reach with load encroachment characteristic........324
Minimum operate currents....................................................325
Phase selection, quad, fixed angle, load encroachment
FDPSPDIS......................................................................................325
Identification.............................................................................. 325
Identification......................................................................... 325
Application.................................................................................325
Setting guidelines...................................................................... 326
Load encroachment characteristics......................................326
Resistive reach with load encroachment characteristic........331
Minimum operate currents....................................................332
High speed distance protection ZMFPDIS..................................... 332
Identification.............................................................................. 332
Application.................................................................................332
System earthing................................................................... 332
Fault infeed from remote end............................................... 336
Load encroachment..............................................................337
Short line application............................................................ 338
Long transmission line application....................................... 338
Parallel line application with mutual coupling....................... 339
Tapped line application........................................................ 345
Setting guidelines...................................................................... 347
General.................................................................................347
Setting of zone 1.................................................................. 348
Setting of overreaching zone................................................348
Setting of reverse zone........................................................ 349
Setting of zones for parallel line application......................... 349
Setting the reach with respect to load.................................. 351
Zone reach setting lower than minimum load impedance.... 352
Zone reach setting higher than minimum load impedance...354
Table of contents
Line distance protection REL670 2.2 IEC 7
Application manual
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