208/480V step up transformer question

[jaraujo1]

I need to step up the voltage from 208 to 480V transformer for an AC load of about 350KVA. I am assuming I will have to go with a Y to Delta transformer.
The problem is the safety ground at the equpment if I go with a Y to delta transformer. The question....Can I get Y to Y step up transformer so I could ground the equipment thru the Y center tap of the ransformer? Any suggestion on past experience from someone who has gone thru similar jobs?

Thanks,

 

[Cold Fusion]

buy a 208D primary -480Y secondary transformer.

cf

 

[iwire]

I agree with cold, buy a 208 delta / 480 wye transformer

 

[jaraujo1]

208/480V step up transfomer question

208/480V step up transfomer question

So it means we use the center tap on the secondary as the safety ground connecting to the motor case.

 

[dereckbc]

I am assuming I will have to go with a Y to Delta transformer.

No reason to have a "Y" primary, the neutral has no purpose of function, nor is it required by code. Go Delta-Wye and call it a day.

 

[LarryFine]

So it means we use the center tap on the secondary as the safety ground connecting to the motor case.

Yes, as long as you properly connect it to a properly-sized and made grounding electrode system, too.

And, yes, you should nolt connect the primary 'neutral' connection to the source neutral; let it float.