Flame Retardant Material - Made of excellent flame retardant plastic materials, it has good insulation, high temperature resistance, aging resistance, safe and reliable. Silver Contacts - Using silver contacts in this product can significantly improve conductivity and product lifespan. Miniature Household Circuit Breaker - The dual power automatic circuit breaker is a miniature household circuit breaker, mainly used to test whether the main power supply or backup power supply is normal to ensure the continuity, reliability, and safety of the power supply. This product is specially designed for rail mounting, intended for PZ30 distribution boxes. Backup Power Supply - When the normal power supply is abnormal, the backup power supply works immediately, and the power supply is switched within milliseconds without interruption. Application - Switch to backup power supply during power outage and switch to main power supply when power is restored. Widely used in various places where continuous power failure is not allowed, such as factories, shopping malls, kindergartens, etc. Dual Power Supply Automatic Transfer Switch Miniature Household Circuit Breaker Controller Fast Millisecond Circuit 2P Changeover Generator Switch Electrical Commutator How to use: Rail mounted for use. Specification: Item Type: Dual Power Supply Automatic Transfer Switch Material: PC, Silver Insulation Voltage: AC690V Rated Voltage: 400V AC Coil Voltage: 220VAC Level: PC Level Specifications: 2P Lifespan: Electrical: 2000 times; Mechanical: 5000 times Rated Short-Circuit Current: 50 kA Fuse: RT16-00-63A Rated Impulse Withstand Voltage: 8 kV Control Circuit: Rated control voltage Us: AC220V 85% Us-110% Us Auxiliary Circuit: Two relays, each relay has two sets of contacts Capacity: AC220V50HZ le=5y Contact Time: <50 ms Operating Transition Time: <50 ms Return Time: <50 ms Stop Time: <50ms Package List: 1 x Dual Power Supply Automatic Transfer Switch 1 x User Manual Note: 1. The maximum ambient temperature should not exceed 40℃, the lowest temperature should not be lower than -5℃, and the average temperature over 24 hours should not exceed 35℃. 2. The altitude of the installation site should not exceed 2000 meters. 3. When the maximum temperature reaches 40℃, the relative humidity of the installation site should not exceed 50%; when the temperature is the lowest temperature -5℃, the relative humidity is higher, for example, if the temperature is 25℃, the relative humidity is 90%. Special measures should be taken to deal with temporary condensation on product surfaces due to temperature changes.