wireperson
Senior Member
- Location
- Florida
I need 3 phase 480V to feed a condensing unit, I have 120/208 3 phase delta high leg service , the people I need to install this transformer for have a step down transformer 480 V delta 120/208 Y , is it possible to reverse the step down transformer and make it a step up? , no neutral needed at the CU, explain why yes or not please.