Causes of high voltage cable failure and treatment 3
Causes of high voltage cable failure and treatment 3
A large part of the reason why high voltage cable fails is because the cable is in water. If the cable enters water, the insulation property will be lost and the cable will become defective. Therefore, in the process of laying cables, you should pay attention to the problem of water ingress. This article gives you a brief introduction to the causes and treatment of high-pressure cable water.
First, the cause of high voltage cable impact:
- 1. During storage: The newly purchased power cable is sealed with plastic sealing sleeves at both ends. However, after using it for a period of time, the rest is wrapped with plastic paper, and the outside is tied with rope. Sealing is not good. Water vapor will seep into the cable.
- 2. When laying the cable: When laying the cable, the cable head wrapped in plastic paper is sometimes immersed in water to allow water to enter the cable; When the cable and its tubes are pulled, the outer sheath may sometimes tear.
- 3. After laying: The cable head is not made in time, so that the unsealed cable port is exposed to the air for a long time, even immersed in water, so that water vapor enters the cable in large quantities.
Second, the high-voltage cable after the impact processing method:
- 1. The cable end must be closed and removed from the cable end. Whether it is stacked or laid, a special sealing sleeve should be used for the cable to prevent moisture leakage.
- 2. The cable head should be produced in time after laying the wire. Strengthen the management of the cable head manufacturing process Once the cable is immersed, the early collapse phenomenon is often the cable head, so the wire head is well made and the overall life of the cable can be prolonged.
- 3. Long cable adopts cable branch box. Several long cables, each about 3000 meters long. For such cables, in addition to intermediate links, one or two cable subboxes are used. Once one cable enters the water, it will not spread to other parts. cable.
High-pressure cable water is an important cause of cable short-circuiting. Therefore, electrical workers need to pay special attention to water in actual work, and try to avoid overflow.
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