Introduction to the Causes and Hazards of Power Cable Damping

Damping of power cables refers to the phenomenon of Cable insulation or sheath becoming damp, usually due to long-term exposure to moisture or moisture intrusion, resulting in a decrease in the performance of the insulation or sheath. The main reasons for this are as follows:

1. Improper storage environment, such as storing cables in damp and poorly ventilated areas, or storing cables in open air for a long time.

2. The cables were not protected during construction and maintenance, or were not sealed in a timely manner during installation, allowing moisture to seep into the cables.

3. The insulation performance of power cables decreases, leading to the possibility of leakage accidents.

4. The insulation performance of the cable decreases, resulting in damage to the quality of the cable and causing an open circuit.

5. The protective effect of the cable sheath is reduced, which may cause leakage current and cause arc short circuit accidents. Therefore, once it is found that the power cable is damp, timely and effective measures must be taken to deal with it, in order to ensure the safety of equipment and personnel.
Damping can cause a decrease in the electrical insulation performance of cables, leading to a decrease in the insulation impedance of the cables. In mild cases, it can increase power loss, and in severe cases, it can cause hazards such as line tripping and fire. At the same time, it may also cause long-term damage to line equipment, affecting its service life. Therefore, it is necessary to avoid the occurrence of cable moisture as much as possible, and regularly inspect and maintain the cables. If it is found that the cable has become damp, it is recommended to replace it in a timely manner.