Motor operating voltage

[sasikumar1985]

We have imported a lot of Europe motors-415V (+/- 5%  , IEC 60034-1) however it will operate in 400V, is this acceptable?
If not, what will be happen to motors in long run and is motor service life will affected?

[CraigEl · Accepted solution]

In the name of "harmonization" the EU invented new standard voltages with wide enough tolerances to include existing national standards.

http://www.schneider-electric.co.uk...t&country=UK&lang=en&id=FA163890&locale=en_US

You should be fine. You're within the +/- 5% (in this case +/-20.75 VAC)

[Ufuk · Accepted solution]

Hi ,

In my opinion as technical solution,

1- You can increase voltage level of your busbar from the transformer tap changer to 415 V or a little bit more if voltage drop occurs. If your other loads are ok with 415 volt level. 

If this solution is impossible,

2- I dont think it will be a problem for motor when we see approx 390 volt on terminals. Just the nominal torque of motor will be decreased accordingly. If you leave a margin for motor nominal power to drive the mechanical load ,  it will not be a problem I think. 

Sincerely