How much do you know about the performance of wires and cables?

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Due to the application of wire and cable products in different situations, the demand for product performance is multifaceted and very broad. Overall, its main performance can be summarized as follows:

1. Electrical performance

Conductivity - Most products require good electrical conductivity, while individual products require a certain resistance range.

Electrical insulation performance - insulation resistance, dielectric coefficient, dielectric loss, electrical resistance characteristics, etc.

Transmission characteristics - refer to high-frequency transmission characteristics, anti-interference characteristics, etc.

2. Mechanical properties

It refers to tensile strength, elongation, flexibility, elasticity, softness, vibration resistance, wear resistance, and mechanical impact resistance.

3. Thermal performance

It refers to the temperature resistance grade and working temperature of the product, the heating and heat dissipation characteristics of electric power transmission wires and cables, the current carrying capacity, short circuit and overload capacity, the thermal deformation and thermal shock resistance of the constituent materials, the thermal expansion of the materials, and the dripping performance of the impregnation or coating materials.

4. Corrosion and climate resistance

It refers to resistance to electrochemical corrosion, biological and bacterial corrosion, chemical (oil, acid, alkali, chemical solvents, etc.) corrosion, salt spray resistance, light resistance, cold resistance, mold resistance, and moisture resistance.

5. Aging performance

It refers to the ability of products and their constituent materials to adhere to their original performance under the influence of mechanical stress, electrical stress, thermal stress, and various other external factors, or under the influence of external climatic conditions.

6. Other performance

This includes the characteristics of certain materials (such as the hardness and creep of metal materials, and the compatibility of polymer materials) as well as certain special application characteristics of products (such as non flame retardance, resistance to atomic radiation, insect bite resistance, delayed transmission, and energy damping).

The performance requirements of a product are primarily considered in terms of the specific use, use conditions, and matching or connection of each product. Among the various performance requirements of a product, there must be some characteristics that are primary and decisive, and should be strictly required; Some are subordinate, and sometimes certain elements are mutually constraining. Therefore, it is necessary to specifically consider the needs of product characteristics.