The automatic transfer switch can quickly switch to a backup power source in the event of a power failure, ensuring continuous power supply to the load circuit. Through the built-in controller and sensors, the automatic switching switch can monitor the status of the power circuit in real time and automatically perform switching operations according to preset logic. The automatic transfer switch has multiple models and specifications to choose from, to meet the needs of different places and loads. The automatic transfer switch emphasizes safety in the design and manufacturing process, which can ensure the safety of operators and the stable operation of equipment.