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Cable Aging, These Reasons Need to Be Checked


Cable Aging, These Reasons Need to Be Checked

Cables will age with the increase of usage time. Aging is not a problem. Faults of aging are problems. In fact, many cable aging faults can be avoided. To avoid these situations, the cable will be used longer. The most direct cause of aging failure is insulation breakdown and breakdown. There are many factors reducing the conductivity of the conductive insulation. According to the actual operating experience, LINA is summarized in the following cases.

cable n machine

1.External Force Injury
From the operational analysis in recent years, especially in areas where the economy is developing at a high speed, quite a number of cable failures are caused by mechanical damage.

2. Insulation Damp
This situation is also common at cable joints in direct buried or drained pipes.
3. Chemical Corrosion
The cable is directly buried in the acid-base area, which often causes the cable armor, lead or outer sheath to be corroded. The protective layer is chemically corroded or electrolytically corroded for a long time, causing the protective layer to fail and the insulation to be lowered.
4. Long-term Load Operation
Overload operation, due to the thermal effect of the current, the load current will inevitably lead to the heating of the conductor when passing through the cable. At the same time, the skin effect of the charge and the eddy current loss of the steel crucible and the loss of the insulating medium will also generate additional heat, thereby increasing the cable temperature. Excessive temperatures during the long-term overload operation accelerate the aging of the insulation,and the insulation is broken down. Especially in the hot summer months, the temperature rise of the cable often leads to the breakdown of the cable insulation first, so in the summer, the cable failure is particularly high.
5. Cable Connector Failure
Cable joints are the weakest link in cable lines, and cable joint failures caused by direct personnel failure (poor construction) often occur. During the process of making cable joints, if the joints are not tightly crimped or insufficiently heated, the insulation of the cable head will be reduced, which causes an accident.
6. Environment and Temperature
The external environment and heat source where the cable is located can also cause excessive cable temperature, insulation breakdown, and even an explosion.

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