Due to the particularity of the cable, it has special requirements for the installation, operation and maintenance of the cable. Cable damp or water to reduce the cable insulation resistance is caused by cable lines running several important aspects of the accident.

Wire and cable in the installation and operation of the installation of moisture or moisture into the cable insulation, mainly in the following circumstances:

1. The power cable end cap is tightly sealed or the cable end is damaged by the external force during cable transport and laying.

2. The power cable sheath is damaged by external forces during cable transport or laying.

3. In the power cable test or run, the cable insulation breakdown damage cable sheath.

4. The power cable accessories are not tightly sealed.

Moisture or moisture once from the cable end or cable jacket into the cable insulation, it is possible from the insulation of copper wire shielding gap or from the conductor gap longitudinal penetration, endanger the entire cable system. After the tide of the cable in the role of high electric field will produce "water tree branches" phenomenon, so that the cross-linked polyethylene insulation performance, resulting in cable insulation breakdown. Therefore, the cable after the special cable damp must be tampered. So far, the tide of the cable to the tide treatment there is no standard method of operation, the results of the tide treatment did not have a unified identification criteria.

The above is the cause of the power cable damp analysis, learn more about the power cable content, please pay attention to kingsignal official website.