Wire harness manufacturers tell you how to prevent cable insulation breakdown

Wire harness manufacturers tell you the general situation, the following measures can be taken to prevent cable insulation breakdown. (1) prevent mechanical damage. Overhead cable, especially along the wall cable, to be covered. Plant moving Shi project, to handle by the power department granted by the earth moving certificate; on the outside of the plant cable line, to strengthen the patrol inspection, and timely stop in the cable line near the digging, take the overhead transmission line and electric seam line soil behavior. (2) Improve the construction quality of cable head. As air bubbles and moisture have a great impact on the compressive strength of the cable head insulation, so in the production and installation process of the cable head, the insulation wrapping should be tight, and there should be no gaps; epoxy resin and quartz powder are strictly dried before use. As the electric field distribution near the terminal head is very uneven, the electric field strength at the edge of the lead jacket is large, so the insulation of the place should be strengthened. (3) Strictly prevent the insulation from moisture. Cable lines in the factory, due to corrosion of the electric lead package is corroded and lead to insulation moisture breakdown accidents occur from time to time, so to strengthen the maintenance of the electric outer sheath, every 2 to 3 years should be in the outer sheath coated with asphalt.

(4) Handling cables should be careful, laying cables should ensure quality. Move the cable to avoid squeezing the cable, laying the cable bending should not be excessive, to prevent damage to the insulation. For oil-impregnated paper-insulated cables, special attention should be paid to the installation of the two ends of the height difference can exceed the specified value. Otherwise, the low end due to the accumulation of oil and lead skin cracking, resulting in oil leakage at the high end due to lack of oil and dry, so that the thermal resistance of this part of the cable increases, the dielectric properties of the paper insulation caused by the deterioration of coking and breakdown. In addition, due to the lack of oil at the high end of the cable, the negative pressure at the terminal head, easy to absorb moisture, thus making the cable end damp, causing breakdown accidents.

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