(TNS) Three-phase high precision full automatic AC voltage stabilizer is composed of regulator,servo motor,  automatic control circuit. When the voltage of the network is not stable or the load varies,the automatic sampling control circuit makes a signal to drive the servomotor to ad-just the position of the carbon brush of the regulator as to make  the output voltage stable to ensure the normal function of the varied of electric equipment.It has advantages of small volume,  light weight,  undistorted waveform, high efficiency, reliable performance, over-voltage protectio