ABB RELION 670 Series Applications Manual page 10

Transformer protection
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7.1.3
Setting guidelines..................................................................................................................... 180
7.1.3.1
General..................................................................................................................................... 180
7.1.3.2
Setting of zone1......................................................................................................................180
7.1.3.3
Setting of overreaching zone.............................................................................................. 180
7.1.3.4
Setting of reverse zone..........................................................................................................181
7.1.3.5
Series compensated and adjacent lines............................................................................ 181
7.1.3.6
Setting of zones for parallel line application....................................................................185
7.1.3.7
Setting of reach in resistive direction................................................................................ 187
7.1.3.8
7.1.3.9
7.1.3.10
Setting of minimum operating currents........................................................................... 189
7.1.3.11
Setting of timers for distance protection zones............................................................. 189
7.2
7.2.1
Identification..............................................................................................................................190
7.2.1.1
Identification...........................................................................................................................190
7.2.2
Application..................................................................................................................................190
7.2.3
Setting guidelines..................................................................................................................... 190
7.2.3.1
Load encroachment characteristics...................................................................................190
7.2.3.2
Resistive reach with load encroachment characteristic................................................ 196
7.2.3.3
Minimum operate currents.................................................................................................. 196
7.3
ZMQAPDIS, ZDRDIR........................................................................................................................197
7.3.1
Identification.............................................................................................................................. 197
7.3.2
Application.................................................................................................................................. 197
7.3.2.1
System earthing......................................................................................................................197
7.3.2.2
Fault infeed from remote end............................................................................................. 200
7.3.2.3
Load encroachment............................................................................................................... 201
7.3.2.4
Short line application............................................................................................................ 202
7.3.2.5
Long transmission line application.................................................................................... 202
7.3.2.6
Parallel line application with mutual coupling................................................................. 203
7.3.2.7
Tapped line application........................................................................................................ 209
7.3.3
Setting guidelines...................................................................................................................... 211
7.3.3.1
General...................................................................................................................................... 211
7.3.3.2
Setting of zone 1..................................................................................................................... 211
7.3.3.3
Setting of overreaching zone............................................................................................... 211
7.3.3.4
Setting of reverse zone..........................................................................................................212
7.3.3.5
Setting of zones for parallel line application.................................................................... 213
7.3.3.6
Setting of reach in resistive direction................................................................................214
7.3.3.7
7.3.3.8
quadrilateral characteristic function activated .............................................................. 216
7.3.3.9
Setting of minimum operating currents........................................................................... 216
7.3.3.10
7.3.3.11
Setting of timers for distance protection zones............................................................. 218
7.4
Full-scheme distance measuring, Mho characteristic ZMHPDIS ......................................... 219
7.4.1
Identification.............................................................................................................................. 219
4
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