1、For Power Supply: When the power supply is abnormal, the switch immediately switches to the standby power supply to ensure continuous, reliable and safe power supply. 2、Wide Application: Mainly used in testing main power and backup power, the auto transfer switch designed to PZ30 distribution can be applied to factory, farm and so on. 3、Better Switching: Can immediately switch to backup power when there is power outage, and switch back to main power for power restoration, very efficient and practical. 4、Premium Material: The silver contact has good electrical conductivity, while the flame retardant PC material enables great insulation and durable with high temperature. 5、Easy to Install: Designed to have a light weight and a compact size as well, the rail installation can be quickly completed within several minutes. Item Type: Automatic Transfer Switch Model: CHLT-63/3P Material: PC, silver. Insulation Voltage: AC690V Rated Voltage: AC400V Coil Voltage: 220VAC Rated Power: 50/60Hz Level: PC Level Specifications: 3P Electrical Life: 2,000 Times Mechanical Life: 5,000 Times Rated Short Circuit Current: 50kA Fuse: RT16-00-63A Rated Impulse Withstand Voltage: 8kV Control Circuit: AC220V rated control voltage Us, 85% Us-110% Us. Auxiliary Circuit: Two relays, each relay has two sets of contact, capacity: AC 220V 50Hz le=5y Touch Time: <50ms Operation Transition Time: <50ms Return Time: <50ms Off Time: <50ms 1 x Automatic Transfer Switch 1 x User Manual