ABB RELION RET670 Applications Manual page 12

Table of contents
6
Setting of reach in resistive direction..........................................279
Load impedance limitation, without load encroachment
function....................................................................................... 280
Load impedance limitation, with Phase selection with load
encroachment, quadrilateral characteristic function activated ...282
Setting of minimum operating currents.......................................282
Directional impedance element for quadrilateral characteristics 282
Setting of timers for distance protection zones...........................285
Full-scheme distance measuring, Mho characteristic ZMHPDIS (21).. 285
Identification.................................................................................... 285
Application....................................................................................... 285
Generator underimpedance protection application.....................285
Setting guidelines............................................................................ 286
Configuration.............................................................................. 286
Settings.......................................................................................286
Full-scheme distance protection, quadrilateral for earth faults
ZMMPDIS (21), ZMMAPDIS (21)......................................................... 290
Identification.................................................................................... 290
Application....................................................................................... 290
Introduction.................................................................................290
System grounding.......................................................................290
Fault infeed from remote end..................................................... 294
Load encroachment....................................................................295
Short line application.................................................................. 296
Long transmission line application..............................................297
Parallel line application with mutual coupling............................. 297
Tapped line application...............................................................303
Setting guidelines............................................................................ 306
General.......................................................................................306
Setting of zone1..........................................................................306
Setting of overreaching zone......................................................306
Setting of reverse zone...............................................................307
Setting of zones for parallel line application............................... 308
Setting of reach in resistive direction..........................................309
Load impedance limitation, without load encroachment
function....................................................................................... 310
Load impedance limitation, with load encroachment function
activated..................................................................................... 312
Setting of minimum operating currents.......................................312
Setting of timers for distance protection zones...........................312
Transformer protection RET670 2.2 ANSI
Application manual