Single phase transformer
Single phase transformer
(OP)
a single phase step down transformer from 230vac to 110vac, if i have ELCB to protect earth fault at primary side circuit, how can i protect earth fault at secondard side circuit without add on a ELCB






RE: Single phase transformer
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: Single phase transformer
Is this allowed per code? I don't know, as ELCBs were used in many different jurisdictions and I'm not sure what yours allows.
RE: Single phase transformer
RE: Single phase transformer
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If we learn from our mistakes I'm getting a great education!
RE: Single phase transformer
He wants ground fault protection on the transformer secondary without adding a ground fault p[rotection device on the secondary.
First answer; He can't.
Second answer, if he connects the transformer in a buck configuration the protection on the 230 V circuit will also protect the 110 V circuit.
The transformer must be 230:120 V to get 110 V output. That may be difficult to find, but no more difficult than a 230:110 V transformer. Both configurations can be made, it's just that no-one is making them.
Bill
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"Why not the best?"
Jimmy Carter