Hitachi RET670 Commissioning Manual page 14

Table of contents
11.7.4.1
11.7.4.2
11.8 Frequency protection.........................................................................................................217
11.8.1 Underfrequency protection SAPTUF ..............................................................................217
11.8.1.1
11.8.1.2
11.8.2 Overfrequency protection SAPTOF ................................................................................218
11.8.2.1
11.8.2.2
11.8.3 Rate-of-change frequency protection SAPFRC ............................................................. 219
11.8.3.1
11.8.3.2
11.9 Multipurpose protection..................................................................................................... 220
11.9.1 Function revision history..................................................................................................220
11.9.2 General current and voltage protection CVGAPC...........................................................220
11.9.2.1
11.9.2.2
11.9.2.3
11.9.2.4
11.9.2.5
11.9.2.6
11.10 Secondary system supervision..........................................................................................222
11.10.1 Current circuit supervision CCSSPVC ........................................................................... 222
11.10.1.1
11.10.1.2
11.10.2 Fuse failure supervision FUFSPVC.................................................................................223
11.10.2.1
11.10.2.2
11.10.2.3
11.10.2.4
11.10.2.5
11.10.2.6
11.10.3 Fuse failure supervision VDSPVC...................................................................................226
11.10.3.1
11.10.4 Voltage based delta supervision DELVSPVC..................................................................227
11.10.4.1
11.10.4.2
11.10.5 Current based delta supervision DELISPVC...................................................................227
11.10.5.1
11.10.5.2
11.10.6 Delta supervision of real input DELSPVC....................................................................... 228
11.10.6.1
11.10.6.2
11.11 Control...............................................................................................................................229
11.11.1 Synchrocheck, energizing check, and synchronizing SESRSYN....................................229
11.11.1.1
8
Verifying the signals and settings...............................................................................215
Completing the test.................................................................................................... 217
Verifying the settings.................................................................................................. 217
Completing the test.................................................................................................... 218
Verifying the settings.................................................................................................. 218
Completing the test.................................................................................................... 219
Verifying the settings.................................................................................................. 219
Completing the test.................................................................................................... 219
Built-in overcurrent feature (non-directional)..............................................................220
Overcurrent feature with current restraint.................................................................. 221
Overcurrent feature with voltage restraint.................................................................. 221
Overcurrent feature with directionality........................................................................221
Over/Undervoltage feature.........................................................................................222
Completing the test.................................................................................................... 222
Verifying the settings.................................................................................................. 222
Completing the test.................................................................................................... 223
Checking that the binary inputs and outputs operate as expected ........................... 223
Measuring the operate value for the negative sequence function .............................223
Measuring the operate value for the zero-sequence function ................................... 224
Measuring the operate value for the dead line detection function..............................225
Checking the operation of the du/dt and di/dt based function ................................... 225
Completing the test.................................................................................................... 226
Completing the test.................................................................................................... 226
Verifying the signals and settings...............................................................................227
Completing the test.................................................................................................... 227
Verifying the signals and settings...............................................................................228
Completing the test.................................................................................................... 228
Verifying the signals and settings...............................................................................228
Completing the test.................................................................................................... 229
Testing the synchronizing function............................................................................. 230
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 504 165-UEN Rev. K
Transformer protection RET670
Commissioning manual