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Step-up 3 phase transformers: Input 240 volt 3 phase and output 480 3 phase ?

Spud

Diamond
Joined
Jan 12, 2006
Location
Brookfield, Wisconsin
Can anyone recommend brands & models of 3 phase step-up transformers that will accept 240v 3 phase and output 480 3 phase ?

The commerical building I am thinking of renting out only has 240v 3 phase. Most powerful machines I have are 18kw and 32kw steam cleaners.
 
For various reasons, what you want to google is: 277/480v 240v transformer.

Codes have changed so check with your inspector (or lack of one) if you can run the transformer backwards.

480 delta transformers exist but corner grounding sucks
 
Long ago ACME sold me a new 480/240 step down for use as a step up - has worked perfectly fine sine 2003. It is the very ordinary Three Phase Dry Type General Purpose
 
Code allows a transformer to be reverse fed only of the manufacturers instructions say it can be done. NEC art. 450.11(B).
 








 
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