Features： 1、Millisecond Switching: Dual power automatic transfer switch can be operated automatically or manually, millisecond switching without power, compact structure. 2、 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: 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 Switch 1 x Instruction Manual