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