Dual Power Automatic Transfer Switch 4P Fast Switching PC AC 400V 63A for Home Factory Item Type: Dual Power Automatic Transfer Switch Model: GFQ3-63/4P Material: PC, silver. Rated Current le: 63A Insulation Voltage Ui: AC 690V Rated Voltage Ue: AC 400V Frequency: 50/60HZ Rated Control Voltage US: 220VAC 85%-110% Us. Level: PC Level Specification: 4P Electrical Life: 2,000 Times Mechanical Life: 5,000 Times Rated Short Circuit Current: 50kA Fuse: RT16-00-63A Rated Impulse Withstand Voltage: 8kV Auxiliary Circuit: 2 relays, each relay has two sets of contact. capacity: AC 220V 50Hz, le=5y. Touch Time: <50ms Operation Switching Time: <50ms Return Time: <50ms Closing Time: <50ms