Power distribution cabinets (boxes) are divided into power distribution cabinets (boxes), lighting distribution cabinets (boxes) and measuring cabinets (boxes), which are the final equipment of the power distribution system. Power distribution cabinet is the floorboard of motor control center. The power distribution cabinet is used in occasions with scattered loads and few circuits; The motor control center is used in places with concentrated loads and many circuits. They distribute the electric energy of a loop of the superior distribution equipment to the nearby load. This level of equipment should provide protection, monitoring and load control.
1) Class I distribution equipment, collectively referred to as the distribution center. They are centrally installed in the substation of the enterprise and distribute the electric energy to the lower-level distribution equipment in different locations. This level of equipment is close to the step-down transformer, so the requirements for electrical parameters are higher and the output circuit capacity is larger. (2) Secondary power distribution equipment is the floorboard of power distribution cabinet and motor control center. The power distribution cabinet is used in occasions with scattered loads and few circuits; The motor control center is used in places with concentrated loads and many circuits. They distribute the electric energy of a loop of the superior distribution equipment to the nearby load. This level of equipment should provide protection, monitoring and load control. (3) The final power distribution equipment is always called lighting distribution box. They are far away from the power supply center and are scattered small-capacity distribution equipment.