Features 1、Enhanced Conductivity And Longevity: Equipped with silver alloy contacts for both dynamic and static parts, this transfer switch significantly improves conductivity and prolongs the product's lifespan. 2、Signal Output Port: Featuring a built in standby disconnect signal output port, switch allows for easy connection to signal indicator lights for external monitoring and observation. 3、Continuous Power Supply: In the event of a power outage from the main source, the backup power source immediately activates to ensure continuous, reliable, and safe power supply. 4、Automatic And Manual Operation: Switch can operate automatically or manually, enabling seamless millisecond switching without power interruption. Its compact structure, reliable transmission, and wide application range make it suitable for various settings where uninterrupted power supply is critical. 5、PP Flame Retardant: Constructed with flame retardant plastic material, this switch offers excellent insulation, high temperature resistance, anti aging properties, and ensures safety and reliability. Specification Item Type: Automatic Transfer Switch Material: PP flame retardant, silver alloy Purpose: Transfer to standby power supply during power failure, transfer to main power supply during incoming call Working Frequency: 50/60 HZ Rated Current: 63 A Insulation Voltage: AC 690 V Number Of Poles: 3 P Rated Voltage: AC 220 V Rated Impact Withstand Voltage: 8 kV Operation Mode: Automatic and manual Conversion Time: < 50 ms Size: Approx. 69 x 36 x 96 x 125 mm / 2.7 x 1.4 x 3.8 x 4.9 in Package List 1 x Automatic Transfer Switch