Feature: 1. HIGH RELIABILITY: Composed of two miniature circuit breakers, sensitive auxiliary contact and alarm contact, mechanical and electrical interlock devices, controller, etc., with high conversion reliability. 2. MANUAL AUTOMATIC MODES: When main power supply fails, the switch will automatically connect load circuit to standby power supply to ensure normal power supply, you can also control it by manual modes. 3. RELIABLE MOTOR: The changeover switch is driven by single motor, which is stable, noiseless and has large impact force. 4. COMPLETE PROTECTION FUNCTIONS: Designed with short circuit protection, overload protection, undervoltage protection, fire protection, dual output and closing signal functions. With indications, easy to operate. 5. WIDE APPLICATIONS: Widely applicable to the installation and use of lighting circuits in office buildings, shopping malls, banks, stations, hospitals and high rise buildings with fire protection requirements. Specification: Item Type: Dual Power Automatic Transfer Switch Material: PC Rated Voltage: 400V Coil Voltage: 220V Rated Current: 63A Frequency: 50/60Hz Specification: 4P Breaking Capacity: 35KA ATSE: Class CB Working Principle: 1. The dual power controller and drive mechanism of this series use AC220V power supply, the power signal depends on A phase and N line of input port of public switch or standby switch. 2. In case of dual power supply is in the automatic state, when the voltage of input phase A and line N of common switch is normal (AC190-240V), the common switch will be closed preferentially regardless of whether the voltage of public power supply B, C and standby switches A, B, C, N is normal. At the same time, the power indicator and common closed indicator light are on. 3. When there is no voltage on the incoming line A and N of common switch, the input of standby switch A and N is normal, no matter whether the voltage on the normal and standby switches B and C is normal, the dual power supply will be switched to standby closed. The power indicator and standby closing indicator are on. 4. Manual function, whether the common power supply and standby power supply have voltage or not, can adopt manual operation mode. During manual operation, the manual and automatic buttons shall be placed in the manual operation position. When the handle is pushed clockwise to the terminal, the standby power circuit breaker R is disconnected and public power circuit breaker N is closed. When the handle is pushed counterclockwise to the terminal, the standby power circuit breaker R is closed and the public power circuit breaker N is disconnected.. Package List: 1 x Dual Power Automatic Transfer Switch1 x Manual Note: Installation Environment Condition:1. The maximum ambient temperature shall not exceed 40℃, the minimum temperature shall not be lower than ‑5℃, and the average temperature within 24 hours shall not be higher than 35℃.2. The altitude of the installation site shall not be higher than 2000m.3. When the maximum temperature up to 40℃, the relative humidity of the installation site should not exceed 50%. When the temperature is ‑5℃, the relative humidity is high, for example, the temperature is 25℃, and the relative humidity is 90%. Due to temperature changes, special measures should be taken to deal with the occasional condensation on the product surface.4. Low pollution, no serious vibration and impact, no corrosive environment, no serious dust, no conductive particles and explosive hazardous substances, no strong electromagnetic interference.