400V 3ph / 415V 3ph

hi dear!

I think the motors in question will work without any problems, but, why don't you try out one of them?

Regards...........

415V is usually nearer 400V in most places, unless you have HT supply from the utility. You need not worry. Use good protective relays and contactors though.

Usually in small L V motor we have tolerance of 10 % in Voltage variation. In HT this

Tolerance in Voltage variation is very less than 10 % ( approximately 3%)

( What is the Nameplate Rating of Ur motor ?)

In Ur case U have 400 V/ 3 P h /50 Hz motors. These motors can be operated at 360

V to 440 V. If these voltage limits are to be crossed either Power consumption will

increases or motor will loose the torque. However motor gives their best efficiency at

the rated voltage.

In Ur case the variation is 3.75 % which is highly acceptable.

I think there will no effect on the efficiency of the motor.

At 415 V

Motor RPM will increases slightly ( Up to 10 RPM with respect to RPM against 400 V)

Power Factor of the motor decreases slightly. ( Up to 0.02 with respect to P.F

against 400 V )

Current will increases very slightly.

These motors can safely be used at 415 V system