The ATS structure is designed with advanced control system which is using professional program controller. The unit will start automatically, when losing electric supply, lack of phase or under voltage. When a fault occurs. the sound and light alarm will send automatically by the sending-to-alarming device. and the point of failure wiII be recorded, meanwhile it can automatically make the machine power off, to ensure the safely of unit. The control panel uses VFD and touch switch, with good and clear display, reriable action features. The control panel can be also designed lor more than two units' automatically interconnection under the customer's requirement. Using PLC as the main control unit, by the controll software to vary the pulse width and pulse interval, the adjustment process is rapid, accurate and steady, the performance is stable and reliable.