The drawer switchgear is a low-voltage drawer switchgear with high technical performance indicators, which can adapt to the development needs of the power market and can compete with existing imported products. The drawer unit of the low-voltage drawer switchgear is equipped with a perfect mechanical interlocking device to ensure the personal safety of the operator; the number of circuits in a single cabinet of the MCC cabinet is up to 22, and the connection between the device and the external cable is completed in the cable compartment, and the cable can be up and down. in and out. The zero-sequence current transformer is placed in the cable compartment, which is convenient for installation and maintenance; the general-type withdrawable low-voltage switchgear for mining is suitable for underground coal mines without gas, coal dust explosion hazards or other similar industrial production departments, and the rated voltage is up to 660v. Switchgear and power conversion equipment used as starting, control and protection of power, power distribution, lighting, motor and other electrical equipment in a three-phase AC low-voltage power distribution system with a rated frequency of 50Hz. Drawer: 1. The height module of the drawer is 160mm, and it is divided into five size series: 1/2 unit, 1 unit, 1.5 unit, 2 unit and 3 unit, and the rated current of a single circuit is 400A; 2. The drawer is only changed in the height dimension 3. Each MCC cabinet can be installed with 11 one-unit drawers or 22 1/2-unit drawers at most; 4. The inlet and outlet lines of the unit drawers are of the same specification with different numbers of pieces according to the current. 5. The electrical transfer between the drawer and the cable room is undertaken by the adapter: the transfer between the drawer and the cable room of 1/2 unit adopts the backplane type Structural Adapters; Ventilation Holes: 1. The ventilation holes are designed and installed so that no arc or soluble metal is ejected when the circuit breaker is in normal operation or under short-circuit conditions. 2. The size, shape and installation position of the ventilation holes will not reduce the strength of the overall casing. 3. The location of the ventilation holes will not reduce the protection level of the enclosure. 4. The ventilation holes at the top of the housing are covered with a cover plate. 1. 8MF steel cabinet frame, with reliable strength; E=20mm module, easy to assemble 2. Each compartment is separated independently, and the function is clearly distinguished; The cable room is equipped with upper and lower outlet channels to meet the needs of the project 3. Modular drawer combination, with interlocking device inside, reliable operation; Withdrawal and fixation, any combination 4. Auxiliary contact of functional unit can meet the requirements of automatic interface 5. High quality electrical components at home and abroad are used, with good interchangeability and convenient installation 6. TMY-T2 series copper bars are used to improve the dynamic stability of the bus and lift the lifting surface 7. Strong combination of main and auxiliary circuit schemes to meet the needs of low-voltage systems such as power generation, power supply and substation.