Let's talk about the solution of local defects or cracks in low-voltage cables.

Solution of Local Defect or Crack of Low Voltage Cable

In the daily use of wire and cable, we often encounter insulation cracks or local defects, so how should low-voltage cable manufacturers solve these problems?

Use a knife to trim the defects, cut into plastic blocks of the same slope shape and size at 45 angles, place them on the repaired part, fix them with pliers or screwdriver, then use a hot air speed welding torch for continuous welding, and press and flatten them with copper sheets. When welding plastics, cable manufacturers should pay attention to the hot air temperature of the welding torch not being too high, so as to prevent the plastics from being burnt at the repaired part. The repaired defects are tested by spark machine and have no breakdown.

Use a knife to cut the defective part of the plastic layer into an inclined plane of 45, remove the plastic blocks or strips with the same shape, color, and thickness, fix them with pliers or screwdriver, connect them with a hot wind speed welding torch, and then compress and flatten them with a copper sheet, After the spark machine test, it is qualified without failure.

Scrape off the plastic defects with a knife, fill the recessed part with the same plastic strip under the action of the hot-air plastic welding gun, and then flatten, flatten, and compact the defect repair part with a copper sheet. After the spark machine test, it is qualified without failure.

Six reasons for low-voltage cable heating

After the low-voltage cable heats up, the cable manufacturer reminds that if the cause cannot be found and the fault can be eliminated in time, the insulation thermal breakdown of the cable will occur during continuous power-on operation, resulting in a short circuit trip between the cables, and even a fire in severe cases.

causes of low voltage cable heating:

1. The conductor resistance of low-voltage cable does not meet the requirements, resulting in heating of the cable during operation.

2. Improper selection of low-voltage cables causes the conductor section of the cable to be too small, resulting in overload during operation. After long-term use, the cable heating and heat dissipation imbalance cause heating.

3. Low-voltage cable manufacturers said that the cable installation is too dense, the ventilation and heat dissipation effect is not good, or the cable is too close to other heat sources, which affects the normal heat dissipation of the cable, and may also cause the cable to heat up during operation.

4. The joint manufacturing process is not good, and the crimping is too tight, which will cause the contact resistance at the joint to be too large, and it will also cause the cable to heat up.

5. Poor insulation performance between cables leads to low insulation resistance, which can also lead to running heat.

6. The local sheath of the low-voltage cable is damaged, and the insulation performance will be slowly damaged after entering the water, resulting in the gradual reduction of the insulation resistance and the heating of the cable during operation.

The above is the "solution to local defects or cracks in low-voltage cables" explained by the editor. If you want to know more, you are welcome to contact us. Thank you for watching. See you next time.