Hitachi Relion 670 Series Commissioning Manual page 15

1MRK506371-UUS Rev. M
11.11 Scheme communication.......................................................................................................... 216
11.11.1 Scheme communication logic for distance or overcurrent protection ZCPSCH (85) ............216
11.11.1.1
11.11.1.2
11.11.1.3
11.11.1.4
11.11.1.5
11.11.1.6
11.11.1.7
11.11.2 Phase segregated scheme communication logic for distance or overcurrent protection
ZPCPSCH (85) .....................................................................................................................219
11.11.2.1
11.11.2.2
11.11.2.3
11.11.2.4
11.11.2.5
11.11.3 Current reversal and Weak-end infeed logic for distance protection 3-phase
ZCRWPSCH (85).................................................................................................................. 221
11.11.3.1
11.11.3.2
11.11.3.3
11.11.3.4
11.11.4 Local acceleration logic ZCLCPSCH.....................................................................................223
11.11.4.1
11.11.4.2
11.11.5 Scheme communication logic for residual overcurrent protection ECPSCH (85)................. 223
11.11.5.1
11.11.5.2
11.11.5.3
11.11.6 Current reversal and weak-end infeed logic for residual overcurrent protection
ECRWPSCH (85).................................................................................................................. 225
11.11.6.1
11.11.6.2
11.11.6.3
11.11.7 Direct transfer trip logic......................................................................................................... 227
11.11.7.1
11.11.7.2
11.11.7.3
11.11.7.4
11.11.7.5
11.11.7.6
11.11.7.7
11.11.7.8
Line distance protection REL670
Commissioning manual
Function revision history...................................................................................................217
Testing permissive underreaching....................................................................................217
Testing permissive overreaching...................................................................................... 217
Testing blocking scheme.................................................................................................. 218
Testing delta blocking scheme......................................................................................... 218
Checking of unblocking logic............................................................................................218
Completing the test.......................................................................................................... 219
Function revision history...................................................................................................219
Testing permissive underreaching....................................................................................219
Testing permissive overreaching...................................................................................... 220
Testing blocking scheme.................................................................................................. 220
Completing the test.......................................................................................................... 220
Function revision history...................................................................................................221
Current reversal logic....................................................................................................... 221
Weak end infeed logic...................................................................................................... 222
Completing the test.......................................................................................................... 223
Verifying the settings........................................................................................................ 223
Completing the test.......................................................................................................... 223
Function revision history...................................................................................................223
Testing the directional comparison logic function............................................................. 224
Completing the test.......................................................................................................... 225
Testing the current reversal logic......................................................................................225
Testing the weak-end infeed logic.................................................................................... 226
Completing the test.......................................................................................................... 227
Low active power and power factor local criteria LAPPGAPC (37_55)............................227
Compensated over- and undervoltage protection COUVGAPC (59_27)......................... 228
Sudden change in current variation SCCVPTOC (51)..................................................... 229
Carrier receive logic LCCRPTRC (94)............................................................................. 229
Negative sequence overvoltage protection LCNSPTOV (47).......................................... 231
Zero sequence overvoltage protection LCZSPTOV (59N)............................................... 231
Negative sequence overcurrent protection LCNSPTOC (46)...........................................231
Zero sequence overcurrent protection LCZSPTOC (51N)............................................... 232
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