400volt delta to 690 volt star FLC

[russell75]

Can someone tell me what I need to do to calculate the full load current using name plate data of a 400 volt delta connected motor that is to be reconnected for 690 volt star operation?

 

[ScottyUK]

You have increased the line voltage by a factor of [√]3 by connecting in star, and the line current decreases by a factor of [√]3.


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I don't have an attitude problem. You have a perception problem...

 

[jraef]

Which is roughly 58% if you are math impaired.

 

[DickDV]

On the lighter side, jraef, wouldn't that be 58% whether you are math-impaired or not?!!!

 

[ozmosis]

Does it not show this on your motor nameplate? If it is suitable for 690V connection in star then it should indicate the FLC on the nameplate alongside the 400V Delta rating.

 

[jraef]

LOL DickDV...

 

[russell75]

Thanks for the help guys