As the artery of modern society, the popularity of electricity has been very high, and the production and manufacturing of all walks of life can not be separated from electricity. The power transmission is inseparable from the cable, so the safe and stable operation of the cable is directly related to the smooth progress of production. The service life of a cable, especially the oxidation induction period of its sheath material, is a key factor in determining the safety of power transmission. In general, the cable design life is 20 years, but the actual service life is often far beyond this figure. However, the direct cause of cable aging failure is often the insulation reduction and breakdown, and the factors that lead to the insulation reduction are many.

According to the actual operation experience, several main factors affecting the service life of the cable are summarized for reference by relevant personnel.

First of all, the quality of the cable itself is the primary factor affecting its service life. If the cable has unqualified problems such as structure, wire size, wire resistance and insulation sheath, it will directly shorten the service life of the cable, and even bury security risks to the normal operation of the power system.

Secondly, the temperature factor can not be ignored. In a high temperature environment, the aging speed of the insulation of the cable will be accelerated, resulting in the breakdown of the insulation, resulting in failure, affecting the service life of the cable.

Third, insulation moisture is also a common cause of failure. If the tightness of the cable is not good, water vapor penetrates into the cable, which will cause the conductor to oxidize and become black, the conductor resistance will increase, and the cable will heat up during use, which will affect the service life of the cable.

Fourth, chemical corrosion is also an important factor. If the cable is buried directly in the acid-alkaline area, the acid and alkali level of the land will corrode the armor, lead, insulation, and sheath protective layer of the cable, accelerate the aging of the cable insulation materials, and reduce the insulation resistance, resulting in cable accidents.

Of course, the human factor cannot be ignored. Cable overload will lead to cable heating, long-term heating will accelerate insulation aging, reduce insulation performance, so that the cable insulation layer is easy to be broken down, and then affect the service life of the cable.

In general, the service life of the cable is affected by many factors, therefore, we need to strengthen the maintenance and management of the cable from many aspects to ensure the safety and stability of power transmission.


Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable, home improvement wire and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable.