3 wire 3 phase ungrounded systems

Former Community Member over 5 years ago

I suspect I already know the answer but are 3 phase, 230 volt, 3 wire ungrounded systems permitted in a UK installation?

I know this is common practice in some parts of the world but it's not something I've come across in the UK.

Just for clarity this would entail a delta connected secondary with 230 V between phases requiring separate earth fault detection.

I wait with abated breath.

Bill

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0 Sparkingchip over 5 years ago

You can use electrical seperation for one item of equipment, but I don’t have a clue where you can source a suitable isolating transformer to give the required reduction in voltage and electrical separation.

A conversation with the technical guys at a transformer manufacturer would probably be a good starting point to see what’s available off the shelf or if you need to get something made.
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0 Sparkingchip over 5 years ago

You can use electrical seperation for one item of equipment, but I don’t have a clue where you can source a suitable isolating transformer to give the required reduction in voltage and electrical separation.

A conversation with the technical guys at a transformer manufacturer would probably be a good starting point to see what’s available off the shelf or if you need to get something made.
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3 wire 3 phase ungrounded systems

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