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  1. sahkotekniikka

    switchboard voltages 270/127V ?

    Can anybody explain backround for voltages used in a Mexican power plant: Auxiliary transformer 480/270V Dyn (secondary winding star point solidly grounded) Switchboard has voltage ratings: 270/127V I could understand voltages 240/120V as used in US influenced countries but 270/127V? It...

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