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Causes of power cable moisture
Release time:
2021-10-18
We have sorted out the following for everyone: when the power cable is in normal operation, if it fails for some reason, the water in the cable trench will enter the cable along the fault point; in civil buildings, especially in the use of large construction machinery construction sites, cable breakage or breakdown accidents caused by various human factors are not uncommon. When such an accident occurs, the insulation of the power cable is seriously damaged, which will also cause the cable to enter water. After the power cable laying is completed, due to the limitation of the application conditions on site, the cable head cannot be made in time, resulting in the unsealed cable fracture being exposed to the air for a long time or even immersed in water.
Power cableWhat is the cause of damp? We have compiled the following for everyone:
During the normal operation of the power cable, if there is a fault for some reason, the water in the cable trench will enter the cable along the fault point; in civil buildings, especially in the construction site where large construction machinery is used, cable breakage or breakdown caused by various human factors Accidents are not uncommon. When such an accident occurs, the insulation of the power cable is seriously damaged, which will also cause the cable to enter water. After the power cable laying is completed, due to the limitation of the application conditions on site, the cable head cannot be made in time, resulting in the unsealed cable fracture being exposed to the air for a long time, even immersed in water, and a large amount of water vapor entering the cable.
When leaving the factory, both ends of the new power cable are sealed with plastic glands. However, after using the-section according to the actual situation of the Shiyi site, the remaining part was simply wrapped in plastic sheets. Because it is usually placed in the open air, the sealing is not good. After a long time of use, water vapor will inevitably penetrate into the cable. During the manufacturing process of cable head (including terminal head and intermediate joint), due to the negligence of construction personnel, the newly processed cable head sometimes accidentally falls into the accumulated water on site. When laying power cables, it is necessary to frequently cross roads, bridges and culverts. Due to weather or other reasons, a large amount of water often accumulates in the cable trench. During the laying process, the cable head will inevitably be immersed in water, and water will enter the cable due to loose packages or damaged plastic sheets. In addition, when the pipe is pulled through the pipe, the outer sheath and even the armor are sometimes scratched, especially when the pipe is pulled mechanically.
The above points are the reason why the power cord is wet. After the cable enters the water, it will age under the action of the electric field, causing the cable to break down. Pay attention to the daily maintenance of high-voltage cables; the use of electricity makes modern life develop rapidly. If the wire is used and maintained improperly, it may cause some safety hazards, which may cause accidents, especially fires. In the use of pumps and motors, cables are essential. In order to ensure the construction safety and cable quality, we should carry out the following maintenance on the cable: In order to ensure the construction quality, especially the manufacturing quality of the cable head must strictly meet the specified requirements.. The cable trench should be kept dry to prevent the cable from being damp, causing insulation degradation and short circuit.
Regularly clean the dust accumulated on the wire and cable to prevent the cable from igniting due to the accumulated dust. Strengthen the regular verification and maintenance of the switch and the protection of the wire and cable circuit to ensure its reliable operation. Strengthen the monitoring of wire and cable operation to avoid overload operation and accidents. Conduct wire and cable test on schedule, and deal with and record any abnormality in time.
Want to know moreOverhead insulated conductor, power cable, steel core aluminum stranded wire, high voltage cableThe content, can pay attention to us.
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