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NV021 - Manual - 08 - 2012
Metering inputs .............................................................................................................................................................................................25
Signal processing ..........................................................................................................................................................................................25
Conventions ....................................................................................................................................................................................................27
Binary inputs ................................................................................................................................................................................................. 29
Output relays ................................................................................................................................................................................................. 33
LED indicators ................................................................................................................................................................................................35
Communication interfaces ...........................................................................................................................................................................37
Rated values .................................................................................................................................................................................................. 38
Undervoltage - 27 ..........................................................................................................................................................................................42
Positive sequence undervoltage - 27V1 ....................................................................................................................................................46
Overvoltage - 59 ............................................................................................................................................................................................ 48
Negative sequence overvoltage - 59V2 .....................................................................................................................................................54
Overfrequency - 81O .....................................................................................................................................................................................56
Underfrequency - 81U ................................................................................................................................................................................. 58
Frequency rate of change - 81R..................................................................................................................................................................64
Breaker failure - BF ...................................................................................................................................................................................... 68
Logic block (Block1) ..................................................................................................................................................................................... 70
Remote tripping .............................................................................................................................................................................................72
Frequency tracking ...................................................................................................................................................................................... 73
Circuit breaker supervision .........................................................................................................................................................................77
Oscillography ............................................................................................................................................................................................... 78
5 MEASURES, LOGIC STATES AND COUNTERS
Measures ....................................................................................................................................................................................................... 79
Protection ...................................................................................................................................................................................................... 79
Delayed inputs .............................................................................................................................................................................................. 79
Internal states ............................................................................................................................................................................................... 79
Relays ............................................................................................................................................................................................................. 79
Counters ......................................................................................................................................................................................................... 79
Self test .......................................................................................................................................................................................................... 80
Fault recording - SFR ................................................................................................................................................................................... 80
Event recording - SER ...................................................................................................................................................................................81
Oscillography - DFR ......................................................................................................................................................................................81
7.2 MMI (Man Machine Interface) ......................................................................................................................................................................95
7.3 MENU
8.1 APPENDIX A1 - I/O DIAGRAM ..................................................................................................................................................................... 103
8.2 APPENDIX A2 - INTERFACES ........................................................................................................................................................................104
8.3 APPENDIX A3 - PROTECTIVE FUNCTIONS .................................................................................................................................................105
8.4 APPENDIX A4 - CONNECTION DIAGRAMS ...............................................................................................................................................106
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