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martin-dj asked

Strange secundary voltage

Hallo eperts,

Situation: Aluminium hull in fresh. Shore power straight to isolation transformer, secundary going to a floating 220V system of only wall sockets. The 12V system is (as it should be!) not connected to the hull, so also "floating".

The iso trans is connected and wired the right way, input 230, output 230, in fresh no connection at PE.

If shorepower is connected, I measure 110V AC between hull PE and L output.

If I furthermore connect the charger, with no batteries connected, I measure about 6V DC between hull and charger's plus...

Since the hull is of aluminium, I'm very careful of leaking power, so can anyone explain this to me?


Martin

Isolation Tranformer
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1 Answer
markus avatar image
markus answered ·

Hi,

The 110V between PE and one of the phases in a IT (isolated) system, is most likely inductive induced Voltage. It is not able to carry any significant amount of current.

BR

Markus

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