Distribution box is a small power distribution box, which contains power switch and safety device. The structure is relatively simple, and it is mostly used for terminal power distribution. Distribution box is the last level of distribution facilities in the power supply system. A distribution box can be a power supply input and multiple power supply output circuits. The power supply output circuit is drawn from the distribution box to each load. Because the size of the distribution box is small, it can not be put into large-scale distribution equipment, so the capacity of the distribution box is not large. Generally, 4-8 small loads are arranged with a distribution box. In the central area of the power supply load, electricity is sent to the load by cable or wire.
Distribution cabinet is the upper level of distribution equipment of distribution box, its volume is large, which can be put into larger electrical equipment, so it is generally used as medium capacity load distribution equipment, including distribution box, motor and so on. Its applicable capacity varies in various technological fields, generally in several kilowatts to dozens of kilowatts. On the basis of leakage protection and short circuit protection provided by traditional distribution boxes, the functions of over-voltage protection, lightning protection, automatic power supply, temperature protection, power limit, fault record, self-inspection, learning and memory, mobile interconnection visualization and digitization are also provided.