With the rapid development of social science and technology, the requirement on ATS switching time has becoming increasingly higher. After more than ten years of dedicated research by ROONSH researchers, the hybrid high-speed transfer switch came out with its design using the two-in-one structure mode & the combination of semiconductor and mechanical switch, and the switching off time being as short as 4.8 milliseconds. All innovations are driven by its concept, i.e. satisfaction of user needs.