3 Phase motor running current

- R
- Raju
  
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posted
16 years ago

Fri, Jan 13, 2006 6:56 AM

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

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- O
- operator jay
  
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posted
16 years ago

Fri, Jan 13, 2006 7:08 AM

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

- P
- Peter Charles Hood
  
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posted
16 years ago

Fri, Jan 13, 2006 8:23 AM

- S
- SQLit
  
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posted
16 years ago

Fri, Jan 13, 2006 10:02 PM

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?

- P
- PCK
  
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posted
16 years ago

Sat, Jan 21, 2006 4:21 AM

is that really kilo-volt or kilo-watt?

3 Phase motor running current

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