400V Supply on 380V motor

[electronext]

will there be any long time effect if we connect 380V 60Hz motor to 400V 60Hz supply?

Thank you.

 

[edison123]

Lower pf, higher no-load current, higher iron losses, higher temps and hence lower life.

Where do you have 400 V, 60 Hz by the way ?

Muthu

http://www.edison.co.in

 

[electronext]

400V 60Hz was the clients requirement and yes it is not a common voltage here in the Philippines. The motor was designed with triple voltage 220/380/440V 60Hz.

Are those effects will still happen even if the motor has 5% voltage tolerance?

 

[davidbeach]

My guess is that you are actually in luck. Probably actually about a 205/410V motor with that name plant. 380V is less than 8% down at 380 and less than 8% up at 440V. Those three voltage probably only involve two different connections.

 

[electronext]

the motor connection are delta-delta/wye-wye/delta 220/380/440V respectively.

 

[burnt2x]

the motor connection are delta-delta/wye-wye/delta 220/380/440V respectively.

Then you don't have a problem at all! Connect the motor for 400V operation. Since you have a double-delta connection for 220V - change the connection to double-wye (1.732X220 = 380V), about 5% over(400/380).