4P Dual Power Automatic Transfer Switch High Temperature Resistant Double Power Transfer Switch AC400V 63A 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