Feature:1. Power Supply Detection: Composed of 2 miniature circuit breakers, a motor and mechanical rotating device,lifting device is used to detect power supply together with controller. When circuit is abnormal, controller makes logical judgment on test result, and turns on or off drive according to command, to ensure electrical loads safety and reliability2. Guaranteed Power Supply: When the power supply fails one or more load circuits will be automatically connected from power supply to another power supply to ensure normal power supply of power load circuit3. Complete Protection Functions: This dual power automatic transfer switch has short circuit, overload and undervoltage protection4. Easy to Use: Good practicability, reasonable structure, small size, beautiful appearance, protective cover, safe and reliable power supply5. Application: Widely used in installation and use of lighting circuits in office buildings, shopping malls, banks, stations, hospitals and high rise buildings with fire protection requirementsSpecification:Item Type: Dual Power Automatic Transfer SwitchModel: NLQ4-125-2PRated Frequency: 50Hz 60HzRated Short Circuit Current: 3kAMechanical Life: Automatic: 3000 Times, Manual: 1500 TimesMaterial: Plastic.Package List:1 x Dual Power Automatic Transfer Switch 1 x User ManualNote:Installation environment conditions: 1. The highest ambient temperature is not more than 40C, the lowest is not lower than ‑5C, and the average temperature within 24 hours is not higher than 35C2. The altitude of the installation site should not be higher than 2000m3. When the maximum temperature reaches 40C, the relative humidity of the installation site should not exceed 50%; when the temperature is the lowest temperature of ‑5C, the relative humidity is higher, for example, if the temperature is 25C, the relative humidity is 90%. Special measures should be taken to deal with occasional condensation on product surfaces due to temperature changes4. Low pollution level, no serious vibration and shock, no corrosive environment, no serious dust, no conductive particles and explosive dangerous substances, no strong electromagnetic interference