HYC1 series control and protection switch electrical appliances are a new type of low-voltage electrical products, and they are the first generation of major products developed in China in the 1990s to fill the domestic gap, with the product category code "CPS".

HYC1 adopts a modular single product structure, integrating the main functions of traditional circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters and isolators. It has long-distance automatic control and on-site manual control, as well as panel indication and electromechanical signal alarm functions.