Automatic Transfer Switch ATS 400A 4P Key benefits Provides uninterrupted switching between two power sources with millisecond transfer time to minimize downtime and maintain continuous operation. Supports both automatic and manual operation for flexible control and fast response to power source changes. Simplifies installation and maintenance with a reliable transmission mechanism and a design aimed at long service life. Broad environmental compatibility for indoor and industrial installations thanks to a wide operating temperature and humidity range. Core features Model: ATS, Size: 400A 4P (fourpole), Rated voltage: AC400V. Use category: AC33B, suitable for switching motor and mixed loads in typical industrial applications. Operating humidity: 20 to 90 percent RH; Working temperature range: 25 to 70 C. Switching performance: millisecond uninterrupted transfer when changing from normal to backup power. Modes: automatic transfer to backup when the normal supply is abnormal, plus manual override for maintenance or testing. Installation and maintenance: designed for straightforward mounting and servicing, with robust transmission for consistent operation and extended service life. Why this product solves common problems Eliminates manual intervention during power disruptions by automatically transferring to backup supply, reducing the risk of process interruption. Minimizes production or service downtime with rapid millisecond switching. Reduces installation and upkeep time with a reliable mechanical design that requires less frequent adjustment. Typical applications Data centers and server rooms where uninterrupted power is required for continuous operation and orderly shutdown procedures. Industrial production lines and motordriven equipment that require fast, dependable transfer to backup power to avoid process interruptions. Commercial buildings and facilities integrating generator or secondary power sources to maintain critical services during main supply failures. Technical summary Model: ATS Current rating: 400A Poles: 4P Rated voltage: AC400V Use category: AC33B Operating humidity: 20 to 90 percent RH Working temperature: 25 to 70 C Operation: automatic and manual transfer; millisecond uninterrupted switching This ATS 400A 4P automatic transfer switch is intended for systems requiring efficient, fast switching between two power sources while offering straightforward installation and maintenance.