Digital Servo Voltage Stabilizer is mechanically coupled to the arm of continuously variable autotransformer, which feeds to the primary of a buck/ boost transformer. The Servo Voltage Stabilizer has a solid state digital control circuit which controls the servomotor. The Servo Voltage Stabilizer can withstand with an overload of 10% of rated load for a period of 30 minutes. The Digital Servo Voltage Stabilizer can be operated over an ambient temperature ranging from of 5° C to 50° C.