Failure analysis of distribution box

Failure caused by material problems of components in distribution box:

1. there is a big gap between the development of distribution box manual and real information technology research data. According to the electrical wiring, the switchgear, measuring instruments, protective electrical appliances and auxiliary equipment are required to be assembled in closed or semi enclosed metal cabinet or on the screen to form a low-voltage distribution box. In normal operation, the circuit can be connected or disconnected by manual or automatic switch. Switch cabinet is an electrical equipment. The external line of the switch cabinet enters the main control switch in the cabinet first, and then enters the sub control switch. Each branch circuit is set according to its needs. For example, instruments, automatic control, motor, magnetic switch, various AC contactors, etc., some of them are equipped with high-voltage room and low-voltage room switch cabinet, with high-voltage bus, such as power plant, and some are also equipped with low cycle load shedding to ensure the main equipment. The power cabinet is a combination of electrical control cabinets that provide power for the normal operation of the whole machine, including fuses, circuit breakers, contactors, frequency converters, high-voltage cabinets, transformers, etc.
2. The management system of distribution box purchase and storage enterprise is not strict.
3. The technical personnel of the distribution box construction is not clear, which brings some unnecessary restrictive factors to the installation and use of the distribution box, which may cause the economic operation failure.

The distribution box failure caused by the analysis of important construction reasons:

1. the quality control of the accessories of the distribution box is not strict, which causes certain hidden dangers in the process of safe production and operation.
2. Installation engineering process is not up to standard, such as: the inside of the box is not clean thoroughly.
3. The material configuration of accessories in the distribution box is not up to standard.
4. The signs in the distribution box are insufficient and not obvious, and the sealing mode of the distribution box in humid environment is not in place, which leaves a hidden danger for the operation of the distribution box.

Financial management of operating institutions for the maintenance of their own poor caused by the distribution box failure:

1. can not be effectively maintained through regular organization of national inspection student testing.
2. Due to the seasonal natural ecological rain, wind and snow, sun and sun exposure and other factors, such as grounding bolt corrosion, loosening and other factors.

Other social reasons are also caused by the distribution box failure:

1. the temporary charge load can not be fully considered, and the long-term calculation or statistics are not careful, so that the distribution box overload operation, resulting in network failure.
2. The wiring holes at the upper and lower ends of the components in the distribution box do not match the diameter and cross section of the incoming and outgoing lines or cables, which may cause power supply hidden trouble.
3. During the construction near the distribution box, the power supply circuit is damaged, resulting in its short circuit or grounding, resulting in the distribution box failure