How to choose the right material for cable accessories

In the power system, cable accessories as an important part of the cable system, its quality and performance are directly related to the safety and reliability of the whole cable system. Choosing the right cable accessory material not only improves the operational efficiency of the cable system, but also extends the service life of the cable and reduces maintenance costs.

In the power system, cable accessories as an important part of the cable system, its quality and performance are directly related to the safety and reliability of the entire cable system. Choosing the right cable accessory material not only improves the operational efficiency of the cable system, but also extends the service life of the cable and reduces maintenance costs. In this paper, we will discuss in detail how to choose the right cable accessory materials from the types of cable accessory materials, selection principles, considerations and practical applications.

一、 The types of cable accessories materials

Cable accessories material types, including metal, plastic, rubber, silicone and FRP and other common.

1. Metal: such as copper and aluminium alloy, with good conductivity and strength, suitable for high-voltage cable wiring and overhead lines.

2. Plastics: such as PVC and PA, with good insulating properties, good corrosion resistance, ease of use, etc., suitable for low-voltage cables.

3. Rubber: such as SR (styrene-butadiene rubber) and EPDM (EPDM), with good elasticity, waterproof, oil resistance, acid and alkali resistance, etc., suitable for containers, heavy equipment and field engineering and other environments.

4. Silicone: with high temperature resistance, good insulation, oxidation resistance and other characteristics, suitable for high temperature environment or occasions requiring high reliability.

5. FRP: with high strength, corrosion resistance, good insulation and other characteristics, suitable for acid and alkali corrosive places, such as sewage treatment plants.

二、 The principle of selecting cable accessories materials

Selection of suitable cable accessories materials, should follow the following principles:

1. Electrical properties: the electrical properties of the cable accessory material is the primary consideration, including whether the electric field distribution is reasonable, the electrical strength of the material, dielectric loss and insulation margin of the product.

2. Thermal performance: the thermal performance of cable accessories is also critical, including dielectric loss, conductor connection contact resistance and its stability, heat conduction release and thermal expansion and contraction of the components of the electrical and mechanical properties of the impact.

3. Mechanical properties: cable accessories materials should have good mechanical strength, wear resistance, impact resistance and anti-aging properties to ensure the stability and safety of the cable system.

4. Corrosion resistance: cable accessories materials should be able to resist the erosion of various corrosive media to ensure the long-term stable operation of the cable system.

5. Environmental protection: With the improvement of environmental awareness, cable accessories materials should try to choose non-toxic, harmless, recyclable and environmentally friendly materials.

三、The choice of cable accessory materials need to be considered factors

1. Cable type: different types of cables have different requirements for accessory materials, such as high-voltage cables need to conductive metal materials, low-voltage cables can choose a good insulation properties of plastic materials.

2. Use of the environment: the use of cable accessories environment is also an important factor to consider when selecting materials. For example, in the high temperature environment should be used in high temperature materials; in the humid environment should be used in waterproof performance of the material; in the acid and alkali corrosive environment should be used in corrosion-resistant materials.

3. Installation and maintenance: cable accessories installation and maintenance costs are also factors to consider. Selection of easy to install and maintain the material can reduce the total cost of the cable system.

4. Safety and reliability: cable accessories materials should have good safety and reliability to ensure that the cable system will not fail or accidents during operation.

In summary, the selection of suitable cable accessory materials is crucial to ensure the safety and reliability of the cable system. In the selection process, factors such as cable type, use environment, installation and maintenance costs, safety and reliability should be fully considered, and suitable materials should be selected according to specific needs. Through scientific and reasonable selection, the operational efficiency and service life of the cable system can be improved, providing a strong guarantee for the stable operation of the power system.