ABB RET650 2.1 IEC Commissioning Manual page 10

Transformer protection
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4
Completing the test................................................................ 76
output CCRBRF...........................................................................76
Checking the re-trip and back-up times..................................77
Verifying the re-trip mode....................................................... 78
Verifying the back-up trip mode..............................................78
Completing the test................................................................ 81
Multipurpose protection.................................................................... 81
Overcurrent feature with current restraint...............................82
Overcurrent feature with voltage restraint.............................. 82
Overcurrent feature with directionality....................................83
Over/Undervoltage feature..................................................... 83
Completing the test................................................................ 84
Secondary system supervision.........................................................84
Fuse failure supervision FUFSPVC.............................................84
expected ................................................................................84
function ..................................................................................85
function ..................................................................................86
function...................................................................................87
Completing the test................................................................ 88
Control.............................................................................................. 88
Apparatus control APC................................................................ 88
Single command, 16 signals SINGLECMD................................. 88
Logic................................................................................................. 89
Three-phase operating mode................................................. 89
1ph/3ph operating mode........................................................ 89
1ph/2ph/3ph operating mode................................................. 90
Circuit breaker lockout............................................................91
Completing the test................................................................ 92
Monitoring.........................................................................................92
RetripMode = Contact ...............................80
Transformer protection RET650 2.1 IEC
Commissioning manual

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