Our independently developed and manufactured RM-12 type SF6-insulated metal-enclosed switchgear with gas filling has passed the type test at the National High-Voltage Electrical Appliances Test Center and been listed as a Zhejiang Province high-tech product under the Zhejiang Province High-Tech Project. It is widely used in 20kV/10kV/6kV distribution systems and serves as a switch product for various urban and rural user power distribution systems. The switch拒is modularized into units that can be combined for different applications, consisting of fixed units and expandable units, catering to the flexible needs of compact switchgear in various substation configurations.