Isolating transformer or Galvanic Isolator

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richie-gorrod asked Jul 3, '23

Isolating transformer or Galvanic Isolator

Hello,

I live on a Dutch barge on a permeant mooring with a land line supply of 63a 1ph.

This feeds into an isolating transfromer from Energy Solutions and then into 2 x Quatros 5kva running ESS,

With everything turned off on the Secondary side of the transformer I am still getting 3 amps of draw from the primary.

A couple of questions.

this is a 15kVa transformer. Is this normal for an idle current draw?

If the transformer is failing can I swap to a Galvanic isolator instead. The transformer is pretty heavy and will be a big job to get the old one out and the new 1 in.

Happy to do it but if I can do with Galvanic isolate then so much the better.

Pretty new to this side of things but hoping for someone out there could help.

Many thanks.

Rich

Isolation Tranformer

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Answer 1 · 2023-07-07T11:52:24Z

mvas answered · Jul 07, 2023 at 11:52 AM

Yes, the isolation Transformer will consume some amps, at idle.

If the transformer is failing can I swap to a Galvanic isolator instead

What makes you think the Isolation Transformer is failing?

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Answer 2 · 2023-07-07T15:02:59Z

kevgermany answered · Jul 07, 2023 at 03:02 PM

If you have good shore power at the correct voltage, there's no need for an isolation transformer. Simply bypass it and put the galvanic isolator into the earth lead.

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Answer 3 · 2023-07-18T07:45:23Z

richie-gorrod answered · Jul 18, 2023 at 07:45 AM

Thanks both for your comments.

I am not sure if the transformer is failing. My simple brain says it is a coil with voltage passing thru it therefore pulls a current. Either it works or it doesn’t. Just surprised at it pulling 3 amps.

Thanks again.

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