Cross-linked polyethylene or XLPE, the abbreviated term, is a thermoset insulation material. It is produced from polyethylene under high pressure using additives like organic peroxides. The process of crosslinking polymers involves the change of the polymer chains’ molecular structure so they are more tightly bound together. The movement of molecules is inhibited under the stimulation of heat, giving it improved stability at elevated temperatures. As a result, this causes the material to change from a thermoplastic to an elastic material, so that the XLPE cable has higher current rating as compared to its PVC counterpart.More Information
Properties of XLPE Cable in Singapore
The polyethylene material itself has high insulation and moisture resistance, excellent dielectric strength, and a low dissipation factor at all frequencies. This makes it an ideal insulator to be used in high voltage applications, however it has limitations in temperature ranges. Thus, the cross-linking of PE to become XLPE elevates the temperature range of the insulation while maintaining the electrical properties.
Even at high temperatures, XLPE cable has a strong resistance to deformation and can be used for both high and low tension current. The insulation will not melt or drip and has higher flow resistance as well as improved ageing characteristics. It is resistance to UV light and oxidation, and has good physical capabilities to withstand against stress rupture, environmental stress, and cracking. Additionally, the mechanical properties of the XLPE cable surpass many other insulations and offer greater elongation, tensile strength and impact resistances. The cable can feature single or multiple cores that help to increase its flexibility.