Features: 1. Adopting double-row composite contact/transverse pull structure/micro-motor advance energy storage and micro-electronic control technology, it basically realize zero arc over. 2. Four operating functions: emergency manual operation, electric remote control operation, emergency disconnection operation in automatic control state, automatic control operation. 3. Adopting reliable mechanical and electrical interlocking, safe and reliable to use. 4. The load isolating execution switch is equipped with mechanical interlocking device to ensure that the main and backup power supply work reliably and do not interfere with each other. 5. With obvious on-off position indication, padlock and other functions, realizing the safety isolation of power and load, safe and reliable. 6. Mechatronics design, switch transfer is accurate, flexible and smooth; Adopting advanced logic control technology, with strong anti-interference capability. 7. Applicable for automatic conversion between main power supply and backup power supply in power supply system, automatic conversion and safety isolation of the two loading equipments. Specification: Insulation voltage: 500V Rated voltage: 400V Rated current: 100V Rated impulse withstand voltage: 4kV 3C rated voltage range: 37V-440V Size: 245*110*135mm / 9.6*4.3*5.3in Package weight: Approx. 3616g / 127.5oz Package list: 1 * Automatic Transfer Switch 1 * Manual Operation Handle 1 * User Manual