XLPE is an abbreviation of cross-linked polyethylene. This has been recognized world-wide as excellent dielectric material for wires and cables. It first went into commercial production in the 1960. Polyethylene, which is a thermoplastic material converted into a thermosetting material by a process of crosslinking. The linear chain structure of polyethylene is changing into three-dimensional network structure. By this change,polyethylene, which has outstanding dielectric properties, is made resistant to extreme temperatures.