sorry yes one leg and ground. Ok i have a 3phase 440v/220v tranny that when connected to mulitple switchboards i get a reading of 155v red to ground,4v white to ground and 153v blue to ground. When i disconnect main switchboard and have nothing connected to the tranny my voltages from each leg...
Hi all, I have a 90kva 3 phase 440volt/220volt stepdown transformer.
When i test on no load ie secondary not connected to anything but the power is on,
i get 220v between phases but to Earth or ground i get
1st phase 150volts
2nd phase 104volts
3rd phase 150volts
Does this mean my...