The general distribution box or distribution cabinet should be in accordance with the relevant standards of electrical wiring. In terms of switches (circuit breakers), measuring instruments (voltage and current), protection appliances (short circuit overload) and auxiliary equipment and other parts are assembled together in a fully closed or semi enclosed metal box or screen, thus forming the role of power distribution, line distribution and control protection Low voltage distribution device.

In the process of normal operation of the equipment, manual or automatic switch can be used to carry out the action of connecting and breaking the circuit. If there is a fault or abnormal operation of the line, the distribution box will cut off the circuit and alarm measures with the help of protective appliances. In addition, it can also directly display the parameters and indicators during operation through the loaded measuring instruments, and can adjust the electrical parameters according to the actual application needs. If there is deviation from the normal working state, it will send out signals and prompts.

Reasonable distribution of electric energy is conducive to the circuit opening and closing operation to provide convenience, but also can strengthen the relevant security role, can display the circuit on state, make daily management convenient, and in the event of circuit failure is also conducive to maintenance work.

Low voltage distribution box has the characteristics of strong breaking capacity, good dynamic and thermal stability, flexible electrical scheme and convenient combination. For low voltage distribution box maintenance, once every half a year.

The sequence of maintenance is to make preparations before maintenance, and then to carry out maintenance in sections. When there are many distribution boxes, it is generally arranged in double rows, and the two columns are connected by the bus bar separate switch on the top of the cabinet. In order to reduce the scope of power failure, sectional maintenance is carried out in the box. First stop the load on a section of bus and turn on the bus separation switch. After checking and confirming that there is no electricity, hang the grounding wire and signboard to start the maintenance. Check the switches in the box and remove the arc extinguishing cover to see if the contact is damaged. Tighten the bolts of the incoming and outgoing lines, clean the dust in the cabinet, and test the opening and closing conditions of the operating mechanism. Check the bus joint for deformation and discharge traces, and tighten the connecting bolts to confirm the connection is tight. If there is dirt at the bus joint, it should be cleaned up, and the nut should be replaced if there is corrosion.