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Step Up Transformer 208 to 480 Wiring Diagram

Wiring a step up transformer delta/Y 208/480ve phase
Dec 15, 2011Wiring a step up transformer delta/Y 208/480ve phase Transformer is feeding a 480v compressor. The question is what - Answered by a verified Electrician We use cookies to give you the best possible experience on our website.
Wiring 208/480 step up transformer. : electricians
Welcome to Reddit, I'm an electrical apprentice and won't be personally wiring this transformer. I do, however, have some questions that might be suited for this subreddit. The transformer is a 208/480 stepup, as the title suggests. Additional specs are: 30kva, 83 amps primary, 60 hz and 150°C temp rise. The run to primary will be about 40 feet.Top responses240.4(B) 800 Amp or less, next standard breaker.3 votesWhat's the transformer for? What flavor wire is it? Not that it changes the code section regarding the breaker, but it helps paint the whole picture.2 votesIf there is overcurrent protection on the secondary side of the transformer code allows you to exceed 125% on the primary side with your overcurrent read more2 votesHopefully you guys aren't reverse feeding a step down tranformer like the welding shop I went to the other day.1 voteI've seen these before at work. It was for an elevator in an old folks home. The owner only wanted to pay for 120/208 instead of primary, 277/4801 voteSee all
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