Generally, distribution boxes or distribution cabinets must be assembled in accordance with the relevant standards of electrical wiring, such as switches (circuit breakers), measuring instruments (voltage and current), protective appliances (short-circuit overload), and auxiliary equipment. In the closed or semi-closed metal box or on the screen, it constitutes a low-voltage power distribution device that plays the role of power distribution, line distribution and control and protection.
During the normal operation of the equipment, manual or automatic switches can be used to make and break the circuit. If the line fails or does not operate normally, the distribution box will cut off the circuit and alarm measures with the help of protective appliances. In addition, it can intuitively display various parameter indicators during operation through the loaded measuring instrument, and can adjust the electrical parameters according to the actual application needs. If there is a deviation from the normal working state, it will send out signals and prompts.
Reasonable distribution of electric energy is conducive to providing convenience for the opening and closing operations of the circuit, and at the same time, it can also strengthen the relevant safety functions. It can display the conduction state of the circuit to facilitate daily management, and it is also conducive to maintenance work in the event of a circuit failure.
The low-voltage distribution box has the characteristics of strong breaking capacity, good dynamic and thermal stability, flexible electrical scheme introduction, and convenient combination. For the maintenance of low-voltage distribution box, once every six months.
The order of maintenance is to make preparations before maintenance first, and then perform maintenance in sections. When there are many distribution boxes, they are generally arranged in two columns, and the two columns are connected by the busbar switch on the top of the cabinet. In order to reduce the scope of power outages, section maintenance is carried out in the box. First stop the load on a section of the bus, and open the bus separation switch. After checking and confirming that there is no electricity, hang up the grounding wire and the sign to start maintenance. Check the switches in the box and remove the arc chute to see if the contacts are damaged. Tighten the bolts of the incoming and outgoing lines, clean the dust in the cabinet, and test the opening and closing of the operating mechanism. Check whether the busbar joints are deformed and whether there are any traces of discharge, and tighten the connecting bolts to confirm that the connection is tight. If there is dirt on the busbar joint, it should be cleaned up, and the nut should be replaced if it is corroded.