TND1/TNS1 series full-automatic AC voltageregulator collects sample and amplifies itand automaticly control circuit, and drives theservomotor to rotate the rocker arm and brush inrequired direction, and finally adjusts the outputvoltage to the rated value,finally reaches the aim of stabilizing the voltage.It can be widely used in areaswhere the mains voltage often comes across sharpfluctuation or sharp seasonal variation,such as industrial production, scientific researchmedical treatment & hygiene,household electrical appliances,it can provide any loads with excellent power supply.