Item Type: Automatic Transfer Switch_x000D_ Model: SJCS Q1 63 4P_x000D_ Rated Current: 63A_x000D_ Rated Voltage: 400VAC_x000D_ Frequency: 50Hz_x000D_ Poles: 4P_x000D_ Rated Impulse Withstand Voltage: 4KV_x000D_ Insulation Voltage: 4000V_x000D_ Breaking Capacity: 4KA_x000D_ ATSE Level: CB level_x000D_ Working Principle: _x000D_ The power supply signal of the dual power supply controller and drive mechanism of this series depends on the A phase and N line of the input port of the common switch or standby switch. In the automatic state, when the incoming phase A and N common switch voltage is normal (AC190-240V), the public switch will be closed first regardless of whether the voltage of the public power supply B. C and the backup switch a.b.c and N is normal. At the same time, the power indicator and the public shutdown indicator light up. When the incoming public switch phase A and line N have no voltage, and the incoming standby switch phase A and line N have normal voltage, whether the voltage of normal switch B and standby switch C is normal or not, the 2 way power supply is switched to standby. The power indicator and standby close indicator are on. Manual function, no matter whether the normal power supply and standby power supply have voltage, can use manual operation mode. In case of manual operation, the manual automatic button shall be placed in the manual operation position. Turn the push handle clockwise to the terminal, the standby power supply air switch R is open, and the public power supply air switch N is closed. When the push handle rotates counterclockwise to the terminal, the standby power supply air switch R is closed and the public power supply air switch N is open.