Feature: 1. Millisecond Switching: Dual power automatic transfer switch can be operated automatically or manually, millisecond switching without power, compact structure. 2. Excellent Insulation: The double power automatic transfer switch has reliable transmission, great insulation, easy installation and maintenance, and longer service life. 3. Working Process: When the normal power supply is abnormal, the backup power supply works immediately to ensure the continuity, reliability and safety of power supply and to achieve the effect of non stop power supply. 4. PC and Silver Contact: Excellent flame retardant PC material, high temperature resistance, anti aging, safe and reliable, using silver contact, nice conductivity. 5. Use Scenario: The automatic transfer switch is widely used in various situations where continuous power failure is not allowed, such as homes, shopping malls, factories, laboratories, farms, etc. Specification: Item Type: Double Power Automatic Transfer Switch Model: NLQ4 125 4P Material: PC, silver Rated Frequency: 50Hz 60Hz Insulation Voltage: AC690V 50HZ Rated Voltage: AC400V 50HZ Grade: PC grade Specification: 4P Electrical Life: 2000 times Mechanical Life: 5000 times Rated Short Circuit Current: 50kA Fuse: RT16 00 63A Rated Impulse Withstand Voltage: 8kV Control Circuit: Rated control voltage Us: AC220V 85% Us-110% Us Auxiliary Circuit: Two relays, each relay has two sets of contact capacity: AC220V50HZ le 5y Touch Time: <50ms Operation Conversion Time: <50ms Return Time: <50ms Closing Time: <50ms Use: Switch to standby power when power failure, switch to main power when call. Package List: 1 x Dual Power Automatic Transfer Switch1 x Instruction Manual Note: 1. The maximum surrounding temperature should not exceed 40℃, the minimum should not be lower than ‑5℃, and the average temperature in 24 hours should not be higher than 35℃.2. The altitude of the installation site should not be higher than 2000m.3. When the maximum temperature is 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, the temperature is 25℃, the relative humidity is 90%. Due to temperature changes, special measures should be taken to deal with the occasional condensation on the face of the product.