Single Phase & 3 Phase Variac Single Phase Variac Transformer Product Details: Single Phase Variac are available from 4amps to 28 Amps, in open execution or closed type.Input : 0-270Output : 0-230 volt 3 Phase Variac Transformer Product details: Three phase Variac are available from 4amps to 100amps in open as well as in closerInput : 0 – 470output : 415 volts