The quality of electrical performance is the primary principle for evaluating cable accessories. This mainly considers the rationality of the electric field distribution within the cable accessories, the appropriateness of measures to improve this distribution, the electrical strength of the materials, dielectric loss, and the insulation margin of the product.
Simultaneously, the stability of electrical performance must also be considered, including the chemical and physical properties and structural stability of the cable accessory materials. For example, the stability of stress control materials, the susceptibility of stress cones to deformation, the impact of cable insulation shrinkage on the electric field distribution of the cable accessories and preventative measures, the compatibility of various material combinations, and the stability of the interface properties. Furthermore, the thermal performance of the cable accessories should also be considered, such as dielectric loss, contact resistance and stability of conductor connections, heat conduction and release, and the impact of thermal expansion and contraction on the electrical and mechanical properties of various components.
