What are the general reasons for the aging of flat travelling cables? The direct cause of the common failure of cable aging is the reduction and penetration of the insulation layer. There are many factors that reduce conductive insulation. Based on work experience, the following situations can be sorted out.

     1. The reason for the aging of the flat travelling cable: damage by external force. From the analysis of operating conditions in recent years, especially under the trend of rapid economic development, many common cable faults are now caused by damage to mechanical equipment.

     2. Reasons for aging of flat travelling cables: insulation regaining moisture. This situation is also very common and usually occurs at cable joints directly buried or in pipelines.

     3. Reasons for aging of flat travelling cables: chemical corrosion. Immediately bury the cable in an area with strong acid and alkali, which will usually corrode the armored cable, tin drops or the outer sheath of the cable. The protective layer is subject to chemical corrosion or electrolytic corrosion for a long time, leading to failure of the protective layer and reduced insulation, which can also cause common cable failures.

     4. Reasons for the aging of flat travelling cables: long-term overload operation. Overload operation, due to the thermoelectric effect of the current flow, the load current will inevitably cause the electric conductor to heat up, depending on the cable. In addition, the skin effect of positive charges and the eddy current loss and insulation dielectric loss of the steel armor will also generate additional heat. In turn, the temperature of the cable increases. During long-term overload operation, excessively high temperature will accelerate the aging of the insulation and cause the insulation to be broken down. Especially in the hot summer, the heating of the cable will often cause the defects of the cable insulation to be broken down first, so in the summer, cable failures are more common.