Factors Affecting the Quality of Cable Accessories

The factors affecting the cable accessories quality are diverse, and there are the following aspects in principle:

First, the electrical performance: The quality of electrical performance is the first principle of judging the quality of cable accessories. We have to mainly consider whether the electric field distribution of cable accessories is reasonable, whether the measures to improve the electric field distribution are appropriate and the electrical strength of the material, dielectric loss and insulation. At the same time, we have to consider the stability of the electrical properties, including the chemistry, physical properties and structure stability of cable accessories materials, such as the cable sleeve, such as whether the stress control material performance is stable, whether the stress cone is easy to deform, the effects caused by the cable insulation retraction of the electric field of cable accessories distribution and preventive measures, the combination of various materials compatibility, stability, etc. and the combination of the performance of the interface. In addition, we should also consider the thermal properties, such as dielectric loss, the conductor connecting the contact resistance of its stability, release of the heat conduction, the thermal expansion and contraction of the influence of the electrical properties and mechanical properties of the various components of cable attachment.

Second, the sealing performance: The seal moisture resistant can directly impact on the performance and service life of electrical cable accessories. A sealing structure of the terminal is reliable and stable. In general, the middle connector should be a matched metal moisture-proof enclosure, buried or used in a wet environment.

Third, the mechanical properties: Terminal should have sufficient ability to resist bending and shock. The middle joints (power supply cable sleeving) should be able to withstand a certain amount of tension and measures to prevent external damage.

Fourth, 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 with short construction period; and the requirements on the on-site environment and the technical level of workers are not high, furthermore, the installation quality is easily controlled, and the quality is reliable.

Fifth, the quality of manufacturer assures the system. Before the preformed cable accessories going out of the factory, as the rubber preform prefabricated stress cone, porcelain sheath, shell, dipping and the other parts provided by the manufacturer are assembled into the overall terminal or connector when installed in the field, therefore, manufacturing quality and workmanship of each of parts directly are related to the final quality of the product.

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