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 Former Community Member over 5 years ago

As far as I can tell nothing too specialist. Control system computer, I'm assuming DCS. It looks like this has come from the US without taking into account "local" standards and practices. Not an uncommon mistake. My concern is that the unconventional (from the UK perspective) in itself introduces additional risk to those working on it in the future. If I'm going to redesign in line with UK standards I need a good reason.
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0 Former Community Member over 5 years ago

As far as I can tell nothing too specialist. Control system computer, I'm assuming DCS. It looks like this has come from the US without taking into account "local" standards and practices. Not an uncommon mistake. My concern is that the unconventional (from the UK perspective) in itself introduces additional risk to those working on it in the future. If I'm going to redesign in line with UK standards I need a good reason.
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3 wire 3 phase ungrounded systems

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