Classification of distribution cabinets

Distribution cabinets (boxes) are classified into power distribution cabinets (boxes), lighting distribution cabinets (boxes), and metering cabinets (boxes), and they are the final equipment of the distribution system. The distribution cabinet is a general term for the motor control center. Distribution cabinets are used in situations where the load is relatively dispersed and there are fewer circuits. The motor control center is used in situations with concentrated loads and numerous circuits. They distribute the electrical energy from a certain circuit of the upper-level distribution equipment to the nearby loads. This level of equipment should provide protection, monitoring and control for the load.

(1) Primary distribution equipment is collectively referred to as power distribution centers. They are centrally installed in the enterprise's substation, distributing electrical energy to lower-level distribution equipment at different locations. This level of equipment only relies on a step-down transformer, so the electrical parameters required are relatively high and the output circuit capacity is also large.
(2) Secondary distribution equipment refers to the general term for power distribution cabinets and motor control centers. Power distribution cabinets are used in situations where the load is relatively dispersed and there are fewer circuits. The motor control center is used in situations with concentrated loads and numerous circuits. They distribute the electrical energy from a certain circuit of the upper-level distribution equipment to the nearby loads. This level of equipment should provide protection, monitoring and control for the load.
(3) The final-level distribution equipment is collectively referred to as the lighting and power distribution box. They are far from the power supply center and are scattered small-capacity distribution equipment.