1、WORK DETAIL: When a power supply fails (only normal phase A voltage and standby phase A voltage are tested, and only voltage loss or phase loss is tested), the switch will automatically connect one or more load circuits from one power supply to another to ensure normal power supply to the load circuit. 2、DUAL CONTROL MODE: The automatic switch not only supports automatic mode, but also can be operated through manual buttons, with simple operation and reliable performance. 3、MULTI PROTECTION: This switch features multi protections, including short circuit, overload, phase loss, and undervoltage protection. Safe to use. 4、PC SHELL: Made of premium PC material, this switch has a flame retardant, hight temperature resistant and anti aging shell, ensures a long life span. 5、STRONG CONDUCTIVITY: Silver contacts and brass motor coils are adopted to improve the conductivity and service life of the dual power automatic switch. 6、WIDE APPLICATION: This switch is mainly used for AC220V voltage conversion, such as important scenes where power failure is not allowed, hospitals, stores, banks, chemical engineering, metallurgy, high rise buildings, military facilities, and other important situations. 1 x Dual Power Automatic Transfer Switch Item Type: Dual Power Automatic Transfer SwitchMaterial: PC Flame Retardant, Brass, PCB, SilverOperating Frequency: 50HzRated Voltage: AC230VWorking Voltage: AC220VDisplay Function: Indicator light displayOperation Mode: Automatic, manualATS Level: CB levelConversion Time: Less than or equal to 2sUsage Level: AC 33iBConversion Method: Automatic switching and automatic recoveryWorking Principle:The power supply signals of this series of dual power supply controllers and drive mechanisms depend on the A phase and N line input ports of the normal switch or standby switch. In the automatic state of dual power supply, when the common switch voltages of the incoming phase A and N circuits are normal (ac190-240v), the common switch will be preferentially closed regardless of whether the voltages of the common power supply B. C and the standby switches a.b.c and N are normal. At the same time, the power LED and the public shutdown LED light up. When the incoming common switch phase A and line N have no voltage, and the incoming standby switch phase A and line N have normal voltage, regardless of whether the voltage of the normal switch B and standby switch C is normal, the dual power supply is switched to standby. The power indicator and the standby close indicator light are on. Manual function, regardless of whether the normal power supply and standby power supply have voltage, can adopt manual operation mode. During manual operation, the manual and automatic button should be placed in the manual operation position. Rotate the push handle clockwise to the terminal, the standby power supply air switch R is turned on, and the public power supply air switch N is turned on. When the push handle is rotated counterclockwise to the terminal, the standby power supply air switch R is closed, and the public power supply air switch N is opened.