40A Automatic Transfer Switch 4P Uninterrupted Double Power Changeover Switch for Generator DIN Rail Mount Item Type: Automatic Transfer Switch Material: PC Flame Retardant, Silver Rated Current: 40A Insulation Voltage: AC690V Voltage Withstand Uimp: 8KV Frequency: 50/60HZ Grade: PC Grade (Can be opened under load without generating short circuit current) Specification: 4P Rated Short Circuit Current: 50kA Rated Short Circuit Current (Fuse): RT16-00-63A Rated Impulse Withstand Voltage: 8kV Rated Control Voltage US: 220VAC 50HZ, Normal Working Conditions: 85%Us-110%Us Auxiliary Circuit: AC220V 50HZ le=5A Lifespan: Electrical: ≥1500 Times; Mechanical: ≥5000 Times Touch Time: <50ms Operating Conversion Time: <50ms Return Time: <50ms Closing Time: <50ms Usage Category: AC-31B