Features 1、Dual Position Design: This dual power automatic transfer switch adopts dual position design (A is the common power supply, B is the standby power supply) and is suitable for AC system of 50 to 60hz AC. 2、Good Performance: The main function of this dual power transfer switch is that when the main power supply (common power supply A) fails, the automatic transfer switch will automatically switch to the standby power supply (standby power supply B) to continue to work (the switching speed is less than 50 milliseconds), which can effectively solve the faults brought about by the power outage. 3、Excellent PC Material: This dual power toggle controller is made of excellent PC material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 4、Wide Application: This dual power generator changeover switch has a wide range of applications and can be used for elevator, fire fighting and monitoring. 5、Compact And Portable: This dual power electrical selector switch is small in size and light in weight, which makes it very simple and convenient to install and use. Specification Item Type: Dual Power Automatic Transfer Switch Material: PC Rated Current In: 40A Insulation Voltage Ui: 690VAC Rating: PC Frequency: 50, 60Hz Standard: IEC60947 6 Rated Short Circuit Current Limit (RT16-00/63A): 50KA Package List 1 x Dual Power Automatic Transfer Switch