Feature:1. FLAME RETARDANT MATERIALS: Made of excellent flame retardant plastic materials, possess good insulation, high temperature resistant, aging resistant, safe and reliable2. SILVER CONTACTS IMPROVE CONDUCTIVITY: Using silver contacts in this product can greatly improve the conductivity and service life of the product3. MINIATURE AND PRACTICAL: Dual power automatic switch is a miniature household power switch, which is 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 installation, dedicated to PZ30 distribution box4. MILLISECONDS SWITCHING WITHOUT INTERRUPTION: When the normal power supply is abnormal, the backup power supply works immediately, and the power supply is switched in milliseconds without interruption5. FOR MANY PLACES: Switch to the backup power supply when there is a power failure, and switch to the main power supply when power recovery. Widely used in various places where continuous power failure is not allowed, like factories, shopping malls, nurseries, etc.Specification:Item Type: Dual Power Automatic Transfer SwitchMaterial: PC, silverLevel: PC levelSpecifications: 2PLife: Electrical: 2000 Times; Mechanical: 5000 TimesRated Short Circuit Current: 50kAFuse: RT16-00-63AAuxiliary Circuit: Two Relays, Each Relay Has Two Sets of Contacts Capacity: AC220V50HZ le=5yTouch Time: <50msOperation Transition Time: <50msReturn Time: <50msOff Time: <50ms.Package List:1 x Dual Power Automatic Transfer Switch1 x User Manual Note:1. The maximum ambient temperature should not exceed 40, the minimum should not be lower than ‑5, and the average temperature within 24 hours should not be higher than 35.2. The altitude of the installation site should not be higher than 2000meter.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 of ‑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 occasional condensation on product surfaces due to temperature changes.