5 Key Properties of Cable Accessory Quality

The quality of electrical performance is the primary principle for judging the quality of cable accessories. Mainly consider whether the electric field distribution of the cable accessories is reasonable, whether the measures to improve the electric field distribution are appropriate, the electrical strength of the material, the dielectric loss and the insulation margin of the product. At the same time, the stability of electrical properties must also be considered, including the chemical, physical properties and structural stability of the cable accessories, such as whether the performance of the stress control material is stable, whether the stress cone is easily deformed, and the electric field of the cable accessories due to the retraction of the cable insulation. The influence of distribution and preventive measures, the compatibility of various material bonding, the stability of bonding interface performance, etc.

1. Electrical performance: 

The quality of electrical performance is the primary principle for judging the quality of cable accessories. Mainly consider whether the electric field distribution of the cable accessories is reasonable, whether the measures to improve the electric field distribution are appropriate, the electrical strength of the material, the dielectric loss and the insulation margin of the product. At the same time, the stability of electrical properties must also be considered, including the chemical, physical properties and structural stability of the cable accessories, such as whether the performance of the stress control material is stable, whether the stress cone is easily deformed, and the electric field of the cable accessories due to the retraction of the cable insulation. The influence of distribution and preventive measures, the compatibility of various material bonding, the stability of bonding interface performance, etc. In addition, the thermal properties of cable accessories should also be considered, such as dielectric loss, contact resistance of conductor connections and their stability, heat conduction and release, and the effects of thermal expansion and contraction on the electrical and mechanical properties of each component.

2. Sealing performance: 

The sealing and moisture-proof performance directly affects the electrical performance and service life of the cable accessories. Whether the sealing structure of the terminal is reliable and stable. In general, the intermediate joint should also have a matching metal moisture-proof casing, especially when it is directly buried or used in a humid environment.

3. Mechanical properties: 

The terminal should have sufficient bending and shock resistance. The intermediate joint should be able to withstand a certain tensile force and measures to prevent external force damage.

4. Process performance: 

Process performance is an important condition for the design and selection of cable accessories. The installation process should be as simple as possible to facilitate on-site construction and the construction period is short; the requirements for the site environment and the technical level of workers are not high; the installation quality is easy to control , reliable quality, etc.

5. Manufacturer's quality assurance system: 

When prefabricated cable accessories leave the factory, the manufacturer provides rubber prefabricated parts, prefabricated stress cones, porcelain sleeves, shells, impregnants and other components, which are assembled into integral terminals or components during on-site installation. Therefore, the manufacturing quality and installation process of each component are directly related to the final quality of the product.

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