Dual Power Automatic Transfer Switch Stable Status Display Automatic Transfer Switch 4P 63A 400V Item Type: Dual Power Automatic Transfer Switch Mode: SGQ1 63 4P Material: ABS, Aluminum Alloy Rated Current: 63A Rated Voltage: 400V AC Frequency: 50Hz Number of Poles: 4P Rated Impulse Withstand Voltage: 4 (KV) Insulation Voltage: 4000 (V) Working Principle: The power supply signals of the dual power supply controller and drive mechanism of this series depend on the A phase and N wire of the incoming port of the common switch or the standby switch. Under the automatic state of two way power supply, when the voltages of the common switches of the incoming phase A and N circuits are normal (ac190-240v), the common switches are preferentially closed no matter whether the voltages of the common power supply B.C and the backup switches a.b.c and N are normal. At the same time, the power LED and the common off LED are lit. When the incoming public switch A phase and line N have no voltage, and the incoming standby switch A phase and line N voltages are normal, whether the voltage of normal switch B and standby switch C is normal or not, the two way power supply is switched to standby. The power indicator and standby closed indicator are on. Manual function, regardless of whether the ordinary power supply and standby power supply have voltage, can be operated manually. During manual operation, the manual automatic button shall be placed in the manual operation position. The push handle rotates clockwise to the terminal, the standby power air switch R is open, and the public power air switch N is closed. When the push handle rotates counterclockwise to the terminal, the standby power air switch R is closed, and the public power air switch N is open.