Features Dual Power Supply Compatibility: Supports urban power supply as public power supply and the alternator as the backup power supply, ensuring seamless dual power operation for your home, factory, or office. Automatic Power Switching: Automatically switches to the working power supply, ensuring continuous power delivery. When both power supplies are available, it prioritizes the public power supply. Continuous Power Assurance: Immediately activates the standby power supply in case of abnormality in the normal power supply, ensuring uninterrupted and reliable power supply. Flame Retardant PC Shell: Constructed with flame retardant PC material for superior insulation, high temperature resistance, and aging resistance, ensuring safety and reliability in operation. Easy Installation: Compact and thoughtfully designed for easy installation and maintenance, providing convenience and efficiency for setup and upkeep. Specification: Item Type: Dual Power Automatic Switch Material: PC Rated Working Voltage: 220V AC Rated Voltage (Ue): AC 400V Rated Insulation Voltage (Ui): AC 690V Control Voltage: AC 220V Life: Electronic: 2000 times, mechanical: 5000 times Auxiliary Circuit: AC220V AC110V 50 60Hz Impulse Resistance Voltage: 8KV Operation Mode: Automatic and manual Number of Poles: 2P Package List: Item Type: Dual Power Automatic Switch Material: PC Rated Working Voltage: 220V AC Rated Voltage (Ue): AC 400V Rated Insulation Voltage (Ui): AC 690V Control Voltage: AC 220V Life: Electronic: 2000 times, mechanical: 5000 times Auxiliary Circuit: AC220V AC110V 50 60Hz Impulse Resistance Voltage: 8KV Operation Mode: Automatic and manual Number of Poles: 2P Package List 1 x Dual Power Automatic Switch 1 x User Manual