How many models of dual power switches are there?

"The operating room of the hospital can't afford a power outage. Since installing the intelligent Dual power switch, it automatically switches to the backup power supply within 0.2 seconds when the main power fails, and surgeries have never been affected!" Engineer Wang, the logistics director of a Grade A tertiary hospital, said. Today, this "key equipment" ensuring continuous power supply has become a standard configuration in important places such as hospitals, data centers, and subways, and its model classification and core functions have also attracted more attention.

Dual power switches are mainly divided into two core models to meet different scenario needs. One is the ATS (Automatic Transfer Switch), which has a mechanical structure and a switching time of more than 100 milliseconds. It is suitable for loads with slightly higher tolerance for power outages such as lighting and motors. It usually has 3P/4P pole numbers and a rated current ranging from 6A to 1250A. It is commonly used in community elevators and shopping mall power supply . The other is the STS (Static Transfer Switch), which achieves switching through high-speed thyristors with a speed of ≤8ms. It can meet the zero-power outage requirements of IT equipment and medical instruments, and is mostly used in critical scenarios such as data centers and operating rooms . In addition, it is divided into PC level and CB level by structure. The PC level focuses on switching functions and has strong ability to withstand inrush current; the CB level integrates short-circuit protection for more comprehensive safety .

Its core function is to "seamlessly back up" and avoid power outage losses. When the main power supply has faults such as power outage, overvoltage, undervoltage or phase loss, it will automatically or manually switch to the backup power supply to ensure continuous operation of equipment. In chemical workshops, it can prevent material scrapping caused by power outages in reactors; in communication base stations, it can avoid signal interruption affecting user communication; after being installed in schools in Linhe District, Inner Mongolia, it also specially guarantees the power supply during the high school and college entrance examinations . Now the new products are also equipped with intelligent monitoring functions, which can collect real-time voltage and current data, and the operation status can be mastered remotely, making operation and maintenance more convenient .

With the advancement of new infrastructure, the production technology of dual power switches is also upgrading. Domestic leading enterprises have controlled the product defect rate below 0.15‰ through the transformation of industrial Internet production lines, and launched models suitable for new energy scenarios, which can be compatible with the switching needs of photovoltaic and energy storage power sources . In addition, there are more and more special models resistant to salt spray, high and low temperatures, which can operate stably from coastal terminals to high-altitude areas, and the market scale is growing at an average annual rate of 9.8% .

From daily community water supply to critical medical rescue, dual power switches guard the power safety of various industries with fast switching and stable performance. In the future, with intelligent upgrading, it will also integrate more predictive functions to avoid power supply risks in advance and become an important node of the smart energy network.