We are offering auto transformers. E have carved a niche as one of the dominant variac variable transformers exporters from india. variac auto transformers 1 ph. (closed open type) are designed to give output voltage of 260-270 volts for the input voltage of 240 volts. 3 phase variac auto transformers are designed to give output voltage of 470 volts for input 415 volts. these are available in manual and motorized operating type. features: continuously variable voltage auto transformers (variac)to obtain variable a.c. Voltage from a fixed a.c voltageto obtain established a.c. Voltage from a varying input supplyin testing of electrical equipments where a gradually varying is a must to ensure non-destructive testingto eliminate the possibility of high surgesfor exact control of furnace and heater temperature