We commissioned 6.6KV 3PH Motor. During no load run we noticed that the motor was drawing un balance current. We had balanced 3 phase voltage. Please clarify why the motor is drawing unbalance current.
Regards A.H.Rajagopal
3 Phase motor running current
Jan 13, 2006
4 Replies
Not sure. You could shoot us some numbers, the phasors for the three phase currents and the three line to line voltages. Maybe you had some neg. sequence voltage?
j
The first thing that comes to mind, is how are you measuring the voltage and current? Are you using 2 PT's or 3 Are you using 2 CT's or 3 Are you above 10% loading on the circuits?
is that really kilo-volt or kilo-watt?
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