XLPE insulated cable is a chemical or physical method that transforms the cable-insulating polyethylene molecules from a linear molecular structure into the main network structure, that is, the thermoplastic polyethylene is converted into a thermosetting cross-linked polyethylene, thereby greatly improving it. Heat resistance and mechanical properties, reducing its shrinkage, making it no longer melt after heating, and maintaining excellent electrical properties.
1. Heat resistance: XLPE with mesh structure has excellent heat resistance. It does not decompose and carbonizes below 300 °C. The long-term working temperature can reach 90 °C, and the thermal life can reach 40 years.
2. Insulation performance: XLPE maintains the good insulation properties of PE and further increases the insulation resistance. The dielectric loss tangent is small and is not affected by temperature.
3. Mechanical characteristics: XLPE hardness, stiffness, wear resistance and impact resistance have been improved due to the establishment of new chemical bonds between macromolecules, thus making up for the shortcomings of PE susceptible to environmental stress and cracking.
4. Chemical resistance: XLPE has strong acid and alkali resistance and oil resistance. Its combustion products are mainly water and carbon dioxide, which have less harm to the environment and meet the requirements of modern fire safety.
XLPE insulated cable is suitable for the distribution network, industrial equipment or other areas requiring large-capacity electricity. It is used for fixed power transmission and distribution lines with AC 50Hz and rated voltage of 6kV～35kV. The main function is to transport electric energy.