Features Reliable Power Supply Management: This Dual Power Automatic Switch ensures seamless switching between urban power and backup generator, guaranteeing uninterrupted service for your home or office Effortless Automatic Operation: The switch automatically selects the active power source, prioritizing public supply while ensuring quick transition to standby when needed, enhancing convenience Immediate Power Backup: In case of public power failure, the system instantly activates the standby power, maintaining continuous power supply and increasing safety during outages Durable and Safe Construction: Made from flame retardant PC material, this unit offers excellent insulation and high temperature resistance, ensuring reliable performance over time Compact and Easy to Install: Designed for straightforward installation and maintenance, this power transfer switch is compact, making it ideal for various applications in homes and factories Features: 1、[for Dual Power Supply] Public power supply must be urban power supply, and the backup power supply must be the alternator. 2、[Automatic Mode] When only one power supply is working, the switch will automatically switch to that one. When public and standby power supply are provided at the same time, public power supply is preferred. 3、[Ensure Continuity] When the normal power supply is abnormal, the standby power supply works immediately, thus ensuring the continuity, reliability and safety of the power supply. 4、[PC Shell] Adopt flame retardant PC material, with good insulation, high temperature resistance, aging resistance, safe and reliable. 5、[Convenient Installation] The transfer switch is reasonable in structure, small in size, convenient for installation and maintenance. 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 Mode: Automatic and manual Number of Poles: 2P Package List: 1 x Dual Power Automatic Switch 1 x User Manual Package List 1 x Dual Power Automatic Switch 1 x User Manual