Re: 3 phase operating voltage Home › Electrical Engineering Forum › General Discussion › 3 phase operating voltage › Re: 3 phase operating voltage 2011/04/19 at 1:13 pm #11971 erickenchParticipant Are you sure it's three phase? It might be a single phase three wire 110/220 volt system. Picture a 220 volt transformer with a %50 center tap.
