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2023-06-02        Source:Shanghai Weirong Cable Co., Ltd

How to quickly distinguish the authenticity of high-temperature wires and cables

Precis

Cable water ingress can easily affect the normal use of cables. Firstly, we need to recognize the hazards of cable water ingress. Generally speaking, after cable water ingress, the phenomenon of "water tree aging" occurs under the action of electromagnetic fields. After the formation of water trees, the electric field at the water tree formation point of the cable is prone to abnormal changes, leading to a decrease in the insulation performance of the cable.

What is the cause of cable water ingress? Is there a solution? Today, I will tell you what to do when encountering cable water ingress.

Firstly, it is important to understand the cause of cable water ingress? In the long-term production practice of Yichu special wires and cables, the following three points have been summarized:

During the cable laying process, the cable heads at both ends are not sealed or have poor sealing performance, or when laying through pipes, the outer insulation of the cable breaks and water seeps into the cable.

After the cable is laid, the cable heads at both ends are exposed to air or humid environments for a long time.

During the operation of cable power supply, local cable breakdown occurred, resulting in water infiltration into the cable.

How to solve cable water ingress with Yichu's special wire and cable tips:

1. After the cable is laid, the cable head should be made in a timely manner and the wiring should be completed to eliminate hidden dangers in the bud.

If only two ends of the cable have water ingress, just cut off both ends and redo the cable head wiring.

If the cable has obvious water ingress points, it is necessary to cut off the cable near the water ingress point and make intermediate joints.

4. It is inevitable that there will be water accumulation in the outdoor cable well or cable channel. Try to use brackets to support and fix the cables as high as possible.

5. There is generally no such specialized equipment for pressurizing and drying the cable interior with specialized hot nitrogen gas.

6. Regularly conduct pressure and leakage tests on cables to ensure timely understanding of their operating status.

So, in summary, Weirong Electric Wire and Cable reminds you that the effective method to prevent cable water ingress is still prevention, because once water ingress occurs, either an intermediate joint is made or the entire cable is replaced.

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