ABB REL670 2.2 IEC - Page 11

Setting of timers for distance protection zones.................... 235
Full-scheme distance measuring, Mho characteristic ZMHPDIS .. 235
Identification.............................................................................. 235
Application.................................................................................235
Functionality......................................................................... 235
System earthing................................................................... 236
Fault infeed from remote end............................................... 239
Load encroachment..............................................................240
Short line application............................................................ 242
Long transmission line application....................................... 242
Parallel line application with mutual coupling....................... 243
Tapped line application........................................................ 248
Setting guidelines...................................................................... 249
General.................................................................................249
Setting of zone 1.................................................................. 250
Setting of overreaching zone................................................250
Setting of zone 2.................................................................. 250
Setting of zone 3.................................................................. 251
Setting of reverse zone........................................................ 251
Consideration of zero sequence mutual coupling for
parallel circuits......................................................................257
Load impedance limitation, without load encroachment
function.................................................................................257
Load impedance limitation, with load encroachment
function activated................................................................. 259
Setting of minimum operate currents................................... 260
Setting of directional mode...................................................260
Setting of direction for offset mho.........................................260
Setting of timers for distance protection zones.................... 260
Full-scheme distance protection, quadrilateral for earth faults
ZMMPDIS, ZMMAPDIS.................................................................. 261
Identification.............................................................................. 261
Application.................................................................................261
Introduction...........................................................................261
System earthing................................................................... 261
Fault infeed from remote end............................................... 265
Load encroachment..............................................................265
Short line application............................................................ 266
Long transmission line application....................................... 267
Parallel line application with mutual coupling....................... 267
Tapped line application........................................................ 273
Setting guidelines...................................................................... 276
General.................................................................................276
Setting of zone1................................................................... 276
Table of contents
Line distance protection REL670 2.2 IEC 5
Application manual