What are the cases of low voltage power cable moisture treatment?

I. What are some of the situations in which low voltage power cables are treated against moisture? If the low voltage power cable sheath thin place can not meet the requirements, the cable sheath will be damaged before reaching the normal large external destructive force. As the magnesium oxide crystalline powder used as insulator in low voltage power cables is a material with high moisture absorption rate, in the process of transportation and laying of cables, once the outer sheath is slightly damaged, the magnesium oxide crystalline powder will be affected by the moisture, and the resistance will be greatly reduced; in addition, when making the mid-end joints of cables, the cables should be cut off, which will also cause the magnesium oxide crystalline powder to be affected by the moisture. Usually there are the following two situations: 1, cable damping end dehumidification method in the low-voltage power cable end, moisture intrusion is generally 300-400mm, but if the cable end is not temporarily sealed, long exposure to the air, moisture can intrude into the 1m or so. At this time, the damp end of the cable can be tilted upward, with a gasoline burner from the end of the cable from the distance of about 1 m gently bake the cable, so that the moisture in the cable magnesium oxide is gradually discharged from the inside to the outside. If one end of the baking measured insulation resistance rise is very small, the same way to continue to bake the other end of the cable, until the insulation resistance is qualified. 2, low-voltage power cable copper sheath damage to find and repair when the cable in the middle of the copper sheath in the construction process fracture, and its repair method is: low-voltage power cable insulation at both ends of the insulation layer of the insulation resistance value of the level of the fire after dehumidification does not rise or not much change, can be judged to be Middle fault. The full length of the cable can be baked with a civilian fire, the high resistance of the multimeter can be used to find. If the pointer reading changes greatly when baking a certain part, the fault point can be determined here, and then cut off the power system, dehumidification by slow fire baking, dehumidification, check whether the insulation value is qualified, and connect the cables with intermediate connectors. Moist cable insulation 200 ℃ baking resistance change curve, at the same time, in the selection and use of low-voltage power cables should pay attention to some relevant issues.

-Second, on the international electronic products network platform related to the introduction and sales of products brief: international electronic products network - a professional agent / production / sales of all kinds of {connectors | wiring harness | wire and cable products }; if you have a related [connectors | wiring harness | wire and cable products] purchasing / sourcing needs or would like to buy / to understand which connectors | wiring harness | wire and cable products we can provide solutions, please contact the following Division Division I business personnel; If you have related [connectors | wire harness | wire and cable products] sales / resources and promotion needs, please click on the "¡¡ Business Cooperation ←" with the person to discuss!