Dual Power Automatic Transfer Switch 4P CB Grade Dual Power Generator Changeover Switch AC400V 63A 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.