Cable eccentricity insulation is mainly controlled by measuring the thickness and eccentricity of thinner points. Taking PVC insulation as an example, the thickness of the thinner point shall not be less than 90%-0.1mm of the specified nominal value. PVC sheath: the thickness of the thinner point shall not be less than 85%-0.1mm of the specified nominal value.

Generally, the insulation eccentricity is rarely considered, and the insulation eccentricity of medium-voltage or high-voltage cables is large, generally not more than 15%. Taking a 10kv XLPE cable as an example, copper wires are twisted into conductors with different cross-sectional areas according to a certain standard, and they are insulated and extruded by chemical cross-linking to form the inner core of a semi-finished high-voltage cable. During the production process, the quality inspector measures the thickness of the insulation. The thickness of the insulation is in accordance with the national standard at the thinnest point mm≥3.95. According to the calculation formula of eccentricity:

(Tmax-Tmin) / Tmax ≤ 0.15

Tmax: refers to the maximum thickness of insulation

Tmin: refers to the minimum thickness of insulation

Eccentricity ≤0.15 is qualified. If the thinner spot is smaller than the standard, after a long time of use, the resistance to mechanical and chemical substances at the thinner spot will definitely be weaker, and breakage, breakdown, abrasion, exposure, and damage to the cable will occur earlier. . In severe cases, it will cause accidents and endanger people's lives and property.

The cable eccentricity reflects the technological level of the cable and is an important indicator in the technical control of the factory. KUKA cable products are different from other products. From the initial conductor processing to the final insulating sheath, the quality of each process is strictly controlled to provide customers with reliable and high-quality products.