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. 1 x Dual Power Automatic Transfer Switch1 x Instruction Manual Item Type: Double Power Automatic Transfer SwitchModel: NLQ4 125 4PMaterial: PC, silverRated Frequency: 50Hz 60HzInsulation Voltage: AC690V 50HZRated Voltage: AC400V 50HZGrade: PC gradeSpecification: 4PElectrical Life: 2000 timesMechanical Life: 5000 timesRated Short Circuit Current: 50kAFuse: RT16 00 63ARated Impulse Withstand Voltage: 8kVControl Circuit: Rated control voltage Us: AC220V 85% Us-110% UsAuxiliary Circuit: Two relays, each relay has two sets of contact capacity: AC220V50HZ le 5yTouch Time: <50msOperation Conversion Time: <50msReturn Time: <50msClosing Time: <50msUse: Switch to standby power when power failure, switch to main power when call