VI 845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
6.METERING Summary..............................................................................................................................................6 - 4
Transformer.........................................................................................................................................6 - 5
Percent Differential Current................................................................................................................. 6 - 5
Windings ....................................................................................................................................................... 6 - 6
Thermal Elements..................................................................................................................................... 6 - 7
Tap Changer................................................................................................................................................ 6 - 7
Currents.................................................................................................................................................6 - 8
Voltages .............................................................................................................................................6 - 10
Frequency.........................................................................................................................................6 - 11
Volts Per Hertz.................................................................................................................................6 - 12
Harmonic Magnitude...................................................................................................................6 - 12
Harmonics 1(Harmonics 4)........................................................................................................6 - 13
Harmonic Detection.....................................................................................................................6 - 14
Synchrocheck..................................................................................................................................6 - 14
Power...................................................................................................................................................6 - 15
Energy.................................................................................................................................................6 - 16
Power Factor....................................................................................................................................6 - 17
Current Demand 1.........................................................................................................................6 - 17
Current Demand K1......................................................................................................................6 - 18
Current Demand K2......................................................................................................................6 - 18
Directional Power ..........................................................................................................................6 - 19
Arc Flash ............................................................................................................................................6 - 19
RTDs .....................................................................................................................................................6 - 20
RTD Maximums...............................................................................................................................6 - 20
Analog Inputs...................................................................................................................................6 - 20
FlexElements....................................................................................................................................6 - 21
7.RECORDS Events.....................................................................................................................................................7 - 1
Transient Records.............................................................................................................................7 - 1
Fault Reports.......................................................................................................................................7 - 2
Data Logger.........................................................................................................................................7 - 2
Breakers................................................................................................................................................7 - 3
Breaker Arcing Current........................................................................................................................... 7 - 3
Breaker Health ........................................................................................................................................... 7 - 3
Digital Counters.................................................................................................................................7 - 3
Remote Modbus Device.................................................................................................................7 - 4
Clear Records .....................................................................................................................................7 - 6
8.TRANSFORMER
M&D
DGA Monitoring .................................................................................................................................8 - 2
Device Data.........................................................................................................................................8 - 3
Dissolved Gas Analysis ..................................................................................................................8 - 3
Learned Data Records....................................................................................................................8 - 4
Energization Records......................................................................................................................8 - 5
Digital Fault Records.......................................................................................................................8 - 6
Models....................................................................................................................................................8 - 6
Transformer Models................................................................................................................................. 8 - 6
DGA Models ................................................................................................................................................. 8 - 7
Historical Maximum Record ........................................................................................................8 - 8
Transformer Health Report..........................................................................................................8 - 8
DGA Historical Trend.......................................................................................................................8 - 9
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