Feature: 1. Automatic Transfer Switch: Test whether the common power supply or the standby power supply is normal, it can switch the power supply within 50ms to establish an uninterruptible power supply 2. Enhanced Security: When the common power supply malfunctions, the backup power supply immediately starts working to ensure the continuity, reliability, and security of the power supply 3. Household Rail Mounting: Specifically designed for DIN rail installation in home, this double power automatic transfer switch is suitable for PZ30 distribution boxes, supports 50/60Hz power grids 4. Automatic Changeover: When the common power supply returns to normal, it will automatically switch back, preventing unnecessary disruptions and enhancing operational efficiency 5. Product Advantages: This automatic transfer switch has the features of compact size, efficient conversion, easy installation and maintenance, and long service life, making it suitable for more scenarios Specification: 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: