The basic structure of the cabinet is assembled by C profiles, the standard modulus is E=25mm, and the cabinet is electrostatic coated after pickling. Galvanizing and passivation treatment of internal plates and drawers. Each functional room is isolated from each other, and its cation separation room is divided into functional unit room, bus bar room and electric room, and each room is relatively independent. The vertical channel and the primary and secondary connecting parts are changed to the form of GCK cabinet. The horizontal bus can be placed on the top of the cabinet, and the top cover can be opened. The rear outlet or side outlet can be used. While maintaining the original working performance and appearance, it realizes safety and reliability, convenient installation, detection and maintenance, and reduces production costs. Cabinet protection grade is IP3X-4X.