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What is the cause of the Cable aging?

Jan. 15, 2020

What are the causes of cable aging? Aluminum Alloy Cable Manufacturer has summarized for you, the insulation is reduced and breakdown is the cause of aging failure of wire and cable. There are many elements that cause the insulation to decrease. According to the actual operation experience, the following reasons are summarized:

1) Cause of cable aging: damage by external force. Judging from the data analysis in recent years, especially now in the rapid economic development, most cable failures are now caused by mechanical damage. For example: the cable is not constructed in accordance with normal specifications during the laying and installation process, which is likely to cause mechanical damage; the construction of the buried cable is particularly easy to damage the cable in operation. Sometimes if the damage is not serious, it will take years to cause the damaged part to completely break down and form a fault. Sometimes the damage is relatively serious and a short-circuit fault may occur, which directly affects the safety of the power unit.

CSA Aluminum Alloy Cable

CSA Aluminum Alloy Cable

2) Reason for aging of RWU90 Aluminum Alloy Cable: chemical corrosion. If the cable is buried in a place with acid or alkali effect, it is likely to corrode the armor or outer sheath of the cable. The protective layer will suffer chemical corrosion or electrolytic corrosion for a long time, which will cause the protective layer to fail and the insulation to be lowered.

3) Cause of cable aging: insulation is damp. This situation is also very easy to happen, it usually occurs at the cable joint in the buried or drain pipe. For example: unqualified cable joints and joints are completed under wet conditions, which will cause water or water vapor to enter the joints. Over time, water branches will form under the action of the electric field, which will gradually damage the insulation strength of the cable and cause malfunction.

4) Cause of cable aging: cable connector failure. The most vulnerable part of the cable line is the cable connector. Cable connector failures often occur due to personnel's failure to operate according to regulations. In the process of making cable joints, if the construction crew has any reasons such as insufficient crimping of the joints, insufficient heating, etc., the insulation of the cable head will be reduced, which will cause an accident.

5) Cause of cable aging: long-term overload operation. Overload operation, due to the thermal effect of the current, the load current will inevitably cause the conductor to heat up when passing through the cable. At the same time, the skin effect of the charge and the eddy current loss and insulation loss of the steel armor will also generate additional heat, which will increase the cable temperature. During long-term overload operation, excessive temperature will accelerate the aging of the insulation, and even the insulation will be broken down. Especially in the hot summer, the temperature rise of the cable often leads to the breakdown of the weak insulation of the cable. Therefore, in the summer, the cable has a lot of faults.

6) Causes of cable aging: environment and temperature. Environmental factors and heat sources where the cable is located can also cause the cable to overheat, break down insulation, and even explode.

Our company also has CSA Aluminum Alloy Cable on sale, welcome to consult.


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Jennifer leo