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EF: Control circuit supply

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EF: Control circuit supply

T

Tangocharlie

Control circuit supply

I have recently purchased a used three phase oven in good working order. The control circuit is 220 v and is supplied from one of the phases and a neutral direct from the mains board.
I have been advised that for, safety reasons a 440v/220v transformer would have to be installed instead.
Is this correct,?
there is only one contacter and 2 relays in the control circuit.

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