Feature: 1. Transfer Switch: When the normal power supply is abnormal, the standby power supply will work immediately to ensure the continuity and safety. 2. Silver Contacts: Adopting silver contacts with better electrical conductivity, this dual power automatic transfer switch is very reliable. 3. Simple Operation: Built in regular standby opening signal output terminal, which can be connected with signal indicator light for easy viewing. 4. Plastic Material: The flame retardant plastic material has good insulation and high temperature resistance, very durable for long term using. 5. Easy to Install: Comes with a compact size and a light weight as well, the rail installation of the 400V power transfer switch is very easy. Specification: Item Type: Dual Power Automatic Transfer Switch Model: ZGQ5-100/4P Material: Plastic Function: Switch to standby power supply in case of power failure, and switch to main power supply in case of power failure. Operating Frequency: 50-60HZ Rated Current le A: 100A Insulation Voltage Ui: AC690V Rated Voltage Ue: AC400V Rated Impulse Withstand Voltage: 8kV Rated Control Circuit Voltage Us: AC220V, 85% Us-110% Us. Usage Category: AC-31B Operation Mode: Automatic and manual. Auxiliary Circuit: Two relays, each with two groups of contact capacity, used for contact converter: AC220V50HZ le=Sy. Conversion Time: