1. Millisecond switching, uninterruptible power supply, flame retardant housing with guide rail mounting 2. When normal power supply is incorrect, backup power supply will work immediately to ensure continuity, reliability and safety of power supply 3. Product ma compact structure, reliable transmission, convenient installation and maintenance, and long service life 4. Made of good quality ABS material, have impact resistance, scratch resistance, environmental protection; 5. Automatic transfer switch ma stable structure, excellent performance and long service life Item Type: Automatic Transfer Switch Shell Material: ABS Rated operating voltage: 230 V AC Rated frequency: 50Hz/60Hz Electrical level: PC level Installation method: DIN rail List of packages: 1 x Switch 1 x User Manual 1. Make sure that the installation and wiring are done by professionals and read the instructions carefully before starting work. 2. Please check the integrity of ATSE before installation. Then use the operating handle do open and close the ATSE, check the transmission flexibility, and detect the load generation and load shedding conditions at each stage of the normal and backup power sources. 3. Carefully check the installation steps diagram. The safety distance S1, S2 shall not be less than the designation in the figure. Please be aware: