Nayar Power Controls Pvt. Ltd. Offers Automatic Servo Voltage Stabilizer. Nayar Power Controls Pvt. Ltd. Is an ISO 9001:2008 certified company. The company manufactures Quality Control Systems like UPR - Uninterruptible Power Supply, Inverters, Transformers, Automatic Line Voltage Correctors, and AC Synchronous Motor etc. The Automatic Servo Voltage Stabilizer are one of the best type of stabilizers and are used for delicate electrical and electronic equipments, where the type of load of needs a substantially constant voltage with close tolerance without introducing harmonic distortion.