The shielding layer of high-voltage cables mainly uses metal materials and insulation materials

High voltage cable shielding layerIt refers to a layer of material used to protect the central conductor of a cable line from external interference. It undertakes multiple functions such as electromagnetic shielding, dielectric loss control, and preventing external electric fields from entering the conductor. At present, the shielding layer of high-voltage cables mainly uses metal materials and insulation materials.

1、 Metal shielding material

1. Aluminum shielding layer: Aluminum is a common metal shielding material with good conductivity and electromagnetic shielding properties. It can effectively shield external electromagnetic interference and reduce electromagnetic radiation during cable transmission.

2. Copper shielding layer: Copper is an excellent conductive material commonly used in high-frequency cables or applications with high electromagnetic shielding requirements. Compared to aluminum,Copper shielding layerThe conductivity is higher, therefore it has superior electromagnetic shielding performance.

3. Lead shielding layer: Lead is a high-density metal, so in some special occasions, such as nuclear power plants, medical equipment, etc., people often use lead shielding layers to protect cable lines from radiation from radioactive substances.

2、 Insulation shielding material

1. Conductive polymer: Conductive polymer is a special polymer material with good conductivity and flexibility. It can be made into a thin film form and used as a shielding layer for high-voltage cables, with good electromagnetic shielding and insulation properties.

2. Carbon fiber: Carbon fiber is a lightweight, high-strength insulation material commonly used in fields such as aircraft and automobiles. In the shielding layer of high-voltage cables, carbon fiber can be used as a composite material of conductive and insulating materials to improve shielding performance and mechanical strength.

3. Metal oxides: Metal oxides, such as zinc oxide, aluminum oxide, etc., have good insulation and corrosion resistance properties. They can be used as insulation layers in high-voltage cable shielding layers, serving to protect conductors while also providing certain shielding performance.

3、 Comprehensive shielding material

In recent years, people have begun to use composite materials as shielding layers for high-voltage cables to cope with more complex electromagnetic environments and high-frequency interference. Integrated materials are usually composed of various materials such as metal grids, polymer films, and insulation materials. This shielding material has a complex structure and combines the advantages of metal shielding layer and insulation shielding layer, providing better shielding performance and mechanical strength.

in summary,High voltage cable shielding layerThere are two main types of materials: metal and insulation. Metal materials mainly include aluminum, copper, and lead, while insulation materials mainly include conductive polymers, carbon fibers, and metal oxides. With the continuous development of technology, the application of comprehensive shielding materials has also been widely promoted. Choosing appropriate shielding materials can maximize the performance of high-voltage cables and ensure the stable operation of the power system.