Cannonmn
Member
- Location
- Northern va
Here's the label with diagrams:
Sometimes you can use a step up transformer as a step down (or vice versa) and sometimes you can't. Check with the manufacturer.Here's the label with diagrams:
The short answer is yes, this transformer can be fed from either side. Back in the old days, like before 2011, it was done all the time, backfeed a transformer, corner ground it and your done.Data in pic below. I need to create 480v.3phase to run machine tools. I have a qualified electrician ready to hook up transformer but he's not a transformer expert so I want to find out about issues in doing this. I know influx current will be momentarily high and we're prepared to deal with that. Big question I tried to get GE customer service to answer was whether this transformer, given where taps are etc., will present any huge problems. The GE instruction cited on the label pictured, only mentions the high influx current issue, but nowhere says you cant reverse-feed it. Then there's the ground issue. The only way I've read that you can create a ground for your loads is to use a corner ground, typically done by grounding the B phase. Comments?
Here is a interesting read from GE on the subject:
http://apps.geindustrial.com/publibrary/checkout/Transformer2?TNR=White Papers|Transformer2|generic
FIFY... That paper to my reading means you cannot legally use GE [step-down] transformers for step-up.
Yeah, OK... sheesh:roll:FIFY
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