The role of wire and cable insulation

The insulation layer of wires and cables plays a vital role in the entire cable structure, mainly in the following aspects:

Electrical insulation: The main function of the insulation layer is to prevent the current from passing through the wire or cable sheath into the surrounding environment or other conductors, thereby preventing electrical accidents such as electric shock and short circuit. A good insulation layer can effectively improve the safety and durability of the cable.

Protecting the conductor: The insulation layer can protect the internal conductor from mechanical damage, chemical corrosion and environmental conditions. This protection not only extends the service life of the wire and cable, but also ensures the reliability of the cable in various application scenarios.

Even distribution of electric field: The insulation layer helps to evenly distribute the electric field in the cable, thereby reducing the risk of breakdown caused by electric field concentration. It can control the electric field distribution inside the cable and ensure the stability and efficiency of power transmission.

Prevent leakage: A good insulation layer can effectively prevent accidental leakage of current between the cable sheath or the external environment, ensuring the safety of users and equipment.

Fireproof performance: The insulation layer made of some special materials has good fireproof performance, which can slow down the spread of flames when a fire occurs, increase the evacuation time of personnel, and reduce the impact of fire on the cable system.

In general, the insulation layer of wires and cables is a key component to ensure the safe operation and long-term stability of the cable. Insulation layers of different materials and designs can be selected and optimized according to specific application requirements and environmental conditions.