Cable manufacturers: What are the main reasons for the return of power cables?

1, in the normal operation of the cable, if due to various reasons such as penetration failure, the cable trench water will follow the cause of the failure into the cable internal structure; in civil engineering, especially in the application of large and medium-sized construction machinery construction, cable damage or penetration safety accidents caused by various human factors are also common. When this kind of safety accident occurs, the cable insulation layer is damaged, which will also lead to water seepage of the cable.

2. After the cable is laid, the cable head is not made in time due to the restriction of the conditions applied on the spot, so that the broken surface of the cable without sealing treatment is exposed to the air for a long time or even immersed in water, causing a lot of water vapor to enter the cable.

3. When the new cable is shipped, both ends of the cable are sealed with plastic sealing sleeves, but Shi I used it on the spot in combination with the actual situation-after a period of time, the remaining part will be simply tied up with plastic film to break the surface, because it is usually placed outdoors and the airtightness is not very good, and water vapor will inevitably penetrate into the cable for a long time.

4. In the production of cable head (including terminal head and intermediate joint), considering the carelessness of the staff, the newly treated cable end sometimes accidentally falls into the water on site.

5. When laying cables, they should often cross the rebirth road surface, highway bridges and tunnels. Because of the temperature or other reasons, a lot of water is often accumulated in the cable trench. In the laying process, it is inevitable that the cable head will be immersed in the water. Because the plastic film is not tightly bound or damaged, water will enter the cable. At the same time, when towing belts and burying pipes, sometimes the outer sheath and even the steel armor will be scraped, this is especially true when the equipment belt is used.

Cable manufacturers: common fault problems often encountered in power cables

There are more and more applications for electricity, and they bring a lot of assistance to our daily life. So the application of power cable will be more and more. Sometimes it is inconvenient for us to cause accidents due to slack urban construction management and poor engineering quality. Lead package fatigue, cracking and bursting: this is caused by poor cable assembly standards, poor manufacturer's manufacturing quality, long-term cable load and other reasons. the key appears on a section of cable close to the intermediate joint and terminal head, and some of them appear in areas where cables are concentrated and have poor heat removal.

Outdoor terminal head immersion explosion: the key appears in the distribution line below 10kV. Because of unreasonable construction, operation control and maintenance, condensate at the terminal end accumulates on the cable head, causing moisture penetration and explosion in the insulation layer. The explosion of the intermediate connector of the cable may be caused by the load causing the insulating glue in the RF connector box to rise, causing the casing to crack, or the RF connector to explode due to poor wire connection.

Cable manufacturer: our company has a variety of cable procurement remember to consult our company.