Strengthen the management of cable head production technology. Once the cable is water, it is often the cable header that has an early breakdown. Therefore, the wire head is made well, which can extend the overall life of the cable. For example, when the cable is peeled off the semiconductor layer, a few caves are erected on the semiconductor layer, and then the semiconductor is peeled off like sugarcane peeling. However, when using a knife, if it is too deep, it will hurt the insulation layer and bring opportunities to the emergence of water trees.

Use the cold -shrinking cable head. 3M company's cold -shrinkage silicon rubber cable accessories, simple and convenient production, without spraying or welds. And the attachment of the silicon rubber cable is elastic, and closely stuck to the cable to overcome the shortcomings of thermal reduction materials (there is no elasticity of thermal reduction materials. In the process of thermal expansion and contraction of the cable, there will be a gap between the cable body. It provides convenience for the development of water trees).

The 10KV system uses a 8.7 / 10kV cable. The insulation thickness of this level of cable is 4.5mm, while the insulation thickness of the 6 / 10kV cable is 3.4mm. Due to the increase in the thickness of the cable insulation, the strength of the field can prevent the aging of the water trees. At the same time, because the LOKV neutral point small current connecting the system is grounded, the cable must bear 1.73 times the phase voltage, and it is required to To run 2h, it is necessary to thicken the cable insulation layer.

Use PVC plastic double -wall ripples. The tube is resistant to corrosion, smooth inner wall, good strength and toughness, so when the cable is laid directly, it can greatly reduce the damage of the cable outer cover.

Design of cable grooves (tube) and cable wells. Due to the limits of conditions, the cable layout is set in the form of direct burial or cable sourt, and it is mostly buried. If it belongs to the rainy areas of the coast, the cable sourt or cable well has accumulated water in the middle of the middle. Because the depth of the cable sourt or cable will exceed the depth of the sewer, and the drainage is difficult, it should be coordinated during planning to facilitate the drainage of the cable groove (well). If the cable well does not accumulate water, the middle connector in the cable shaft should be supported with a bracket.