Cable and wire common failure analysis

Wire and cable common failure analysis 1, transmission voltage overload caused by wire and cable damage in the process of electric power transportation, wire and cable damage is mostly caused by the direct action of external forces, and some are affected by natural disasters, resulting in wire and cable is pulled off, etc., can not carry out normal power supply. The wire and cable failure of the building is due to the excessive weight of the wires, resulting in the vertical pressure that the wires and cables have to withstand becomes larger, so that their external insulation layer rupture, etc.. In addition, there are also some human factors, such as the construction team purchased materials do not meet the construction design provisions, or construction personnel did not follow the standard construction, etc., will lead to wire and cable damage.

2, mechanical external forces caused by wire and cable damage wire and cable itself material with a certain pressure range, once the pressure is too large, it will lead to wire and cable insulation is burned. In addition, lightning strikes can also lead to wire and cable carrying overload voltage, and ultimately damage the cable. Therefore, the grid scheduler must strictly follow the provisions of the power distribution, to ensure that the transmission line voltage is always no more than the greater value of its own ability to withstand, so as to avoid damage to the wire and cable phenomenon. Economically developed areas of high demand for electricity, and power transportation distance, once not pay attention to, it is easy to appear the above problems, serious accidents will occur, endangering the lives and properties of residents.3, physical industry caused by the chemical carbonization of wire and cable wire and cable in the transmission process will produce heat, this heat may cause some damage to their own materials, therefore, in the design process of the line, but also in the design process of the cable, the cable will not be damaged. Line for the design process, should also add a heat sink, so that heat dissipates quickly, to prevent carbonization of the insulation layer of the wire and cable, to extend its service life. 4, insulation skin aging in the traditional architectural design, there are many cables openly set up building wall joints, in the absence of a protective device, wire and cable will be prone to aging, especially after entering the summer, by the impact of thunderstorms, air humidity, this aging wire and cable will be easy to appear, especially into the summer, by the impact of thunderstorms, the cable and cable, the cable and cable will be prone to aging. Air humidity, this aging wire is more prone to failure, seriously affecting the use of wire and cable safety. 5, wire and cable quality issues wire and cable seem to be a simple design principle, in fact, the details of the design requirements are extremely high, once the cable itself has quality problems, will affect the normal transmission of electricity. Therefore, in order to avoid the occurrence of short-circuit and other phenomena, the designers need to give strict requirements on the quality of wire and cable, and for different cable link hub for scientific design. At present, China's wire and cable quality problems are relatively serious, waterproof cable design does not meet the actual provisions; cable to promote the design of irrational, etc., * ultimately lead to a series of power transmission failures.

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