SURVAS servo voltage regulator are an effective solution to the problem of voltage fluctuation. They are designed to give a stabilized output within 1 % of the preset voltage level adjustable between 220V to 240V from the Front panel. These servo regulation contain a motorized auto-transformer which bucks or boosts input supply to give a stabilized output. A solid state control circuit ensure error free operation. The output waveform is completely distortion free various models corresponding to different input/output voltages and KVA ratings are available.