Specifications

7SR242 Duobias Description Of Operation
3.12 Voltage Protection: Neutral Overvoltage (59N) ......................................................................40
3.13 Voltage Protection: Under/Over Frequency (81) ....................................................................41
Section 4: Control & Logic Functions................................................................................................42
4.1 Quick Logic .............................................................................................................................42
Section 5: Supervision Functions ......................................................................................................44
5.1 Circuit Breaker Failure (50BF) ................................................................................................44
5.2 Trip/Close Circuit Supervision (74TCS/74CCS) .....................................................................45
5.3 Inrush Detector (81HBL2).......................................................................................................46
5.4 OverFluxing Detector (81HBL5)..............................................................................................46
5.5 Demand...................................................................................................................................47
Section 6: Other Features....................................................................................................................48
6.1 Data Communications.............................................................................................................48
6.2 Maintenance............................................................................................................................48
6.2.1 Output Matrix Test......................................................................................................48
6.2.2 CB Counters...............................................................................................................48
6.2.3 I
2
t CB Wear ................................................................................................................48
6.3 Data Storage...........................................................................................................................49
6.3.1 General.......................................................................................................................49
6.3.2 Event Records............................................................................................................49
6.3.3 Waveform Records. ...................................................................................................49
6.3.4 Fault Records.............................................................................................................50
6.3.5 Demand/Data Log ......................................................................................................50
6.4 Metering ..................................................................................................................................50
6.5 Operating Mode ......................................................................................................................51
6.6 Control Mode...........................................................................................................................51
6.7 Real Time Clock......................................................................................................................51
6.7.1 Time Synchronisation – Data Comms .......................................................................52
6.7.2 Time Synchronisation – Binary Input .........................................................................52
6.7.3 Time Synchronisation – IRIG-B (Optional).................................................................52
6.8 Settings Groups ......................................................................................................................52
6.9 Password Feature...................................................................................................................52
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