Reasons for moisture in the polyolefin cable accessories

Release date：2019-04-06 author：admin Click:

Electricity has become an indispensable part of our daily life work. If we suddenly lose electricity for one day, it will cause many difficulties and problems in our life and work. Electricity relies on power cables for transmission work, so there are strict special requirements for cable installation, operation and maintenance. At present, polyolefin cable accessories have been widely promoted and applied in the insulation protection of power cables, but if the cables are damp, subsequent processing is very difficult. Today we will talk about the reasons for the moisture in the polyolefin cable accessories.

Reasons for the moisture in the polyolefin cable accessories: A. The sealing effect at the end of the cable is not good, or the end cap has been damaged by external force during transportation and laying, so that moisture moisture will enter the cable insulation.

Reasons for the moisture in the polyolefin cable accessories: B. After the polyolefin cable accessory is heated and shrunk on the cable, the cable is not dragged after the cooling is completely cooled, resulting in a gap between the cable attachment and the cable. Or when the cable is moved, it is too rough and violent, causing the cable attachment to scratch and crack.

Reasons for the moisture in the polyolefin cable accessories: C. The polyolefin cable accessories should be fully installed within three hours. Failure to install the cable accessories in time, expose the components for a long time without sealing protection, and the water vapor can easily enter the cable in large quantities.

Reasons for the moisture in the polyolefin cable accessories: D. After the polyolefin cable accessory is installed, the cable test will be performed. In cable tests or daily operations, cable insulation breakdown may occur, damaging the cable cover, causing moisture intrusion.

It is very troublesome to dry the cable after it enters the water. Generally, there is no corresponding equipment. The actual operation is to cut off a small part of the front section if the water intake is not serious, but if the whole cable is flooded, it will be useless. Therefore, for cable accessories and cables, we should mainly prevent moisture.