Feature: 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 Note: 1. Maintenance and inspection should be performed by a professional.2. To ensure that the ATS is performing well, the first maintenance and inspection should be performed within 6 months of use. Thereafter, maintenance and inspection should be carried out at least once a year. The frequency of maintenance and inspection should be increased under severe installation conditions.3. b: Check the electrical contact parts for deformation and damage and clean the surfaces. с: Metal particles and surrounding burnt. Rust, acidification and dust on the contact surfaces can cause poor contact, so perform manual work and measure the necessary contact resistance. If the ATS is wet or has not been used for a long time, dry it before turning on the power. After removing dust, measure the insulation resistance of the normal and AC power supplies using a 500V MΩ meter. The load side and poles, including insulation resistance, should not be less than 10 MQ when using energized parts and metal plates.