The GBM cabinet structure is assembled by multiple bending of aluminum zinc coated plates; All operations are carried out with the cabinet door closed; High protection level, which can prevent the invasion of debris and pests; Simple and effective "five prevention" locking to prevent misoperation; VSG can be used or VD4 vacuum circuit breaker can be selected according to user requirements; Replacing the circuit breaker is simple and the handcart has good interchangeability; The cable room has ample space and can connect multiple cables; Quick grounding switch is used for grounding and circuit short circuit; The circuit breaker room, relay room, and cable room can be equipped with heaters according to user requirements to prevent condensation and corrosion; The circuit breaker room and cable room can be equipped with lighting devices according to user requirements for easy maintenance and repair.