Air Cooled Single Phase Servo Voltage Stabilizer functions in a temperature range varying from -15 degree C to 50 degree C. The Servo Voltage Stabilizer ensures controlled flow of voltage that protects domestic and commercial electrical and electronic system from power fluctuation. The Servo Voltage Stabilizer is suitable for single phase unbalanced or balanced supply as well as unbalanced or balanced load. Air Cooled Single Phase Servo Voltage Stabilizer is equipped with fully automatic IC based solid state, glass epoxy control card for easy on line serviceability.