Economical 36 kV cable system for the Belgian network

摘要

In the medium voltage field, Europe has a long tradition with mass impregnated paper insulated cables. The insulation thickness is specified both in national standards and in IEC standards. When synthetic-insulating materials appeared on the market, mass impregnated paper insulation was gradually replaced first by polyethylene (PE) first, and later by cross-linked polyethylene (XLPE) and ethylene propylene rubber (EPR). The insulation thicknesses were chosen the same as before due to a lack of knowledge of these new products. Since the introduction of XLPE in the cable industry, significant improvements in the quality of semiconducting and insulating materials and in the manufacturing process have led to the development of high voltage and extra high voltage XLPE cables with dielectric stresses becoming higher and higher.