In the layout of the power cable, we must consider the impact of power cable insulation factors related issues, the following is a brief introduction to you

Factors affecting the insulation performance of power cables are water, temperature and semiconductor interface.

1. Effect of moisture on cable insulation

Power cables in the production process there will be water molecules in the presence of water molecules in the electric field and the role of temperature, will form a water branch, water branches in the long run will grow, will migrate, gradually evolved into the air gap, the formation of discharge , Damage insulation.

In addition the cable after forming the outer jacket broken water, in the core and insulation there is moisture, will reduce the cable insulation characteristics, the formation of discharge channels. In the construction must protect the inner and outer sheath, to prevent the core of water.

2. Effect of temperature on cable insulation

The performance of the cable insulation material is closely related to the temperature, with the temperature rise, the insulation performance decreases, the insulation resistance decreases, the breakdown field strength decreases, the temperature increases the insulation accelerated aging, exceeding the maximum working temperature also causes the cable deformation, Disagreement, serious will lead to thermal breakdown occurs, so to strictly control the cable operating temperature, does not allow the cable to work overload

3. The influence of semiconductor interface on insulation

In the cable terminal and the joint production have to deal with semiconductor shielding layer, which is the key to the quality of the joint. Here is the field of strong changes in the site, if the processing level is not high, put into operation after the damage caused by insulation, serious cases in the completion of the test will occur breakdown.

The above is a brief introduction to the insulation factors of power cables, learn more about the contents of power cables, please pay attention to kingsignal official website.