Method of manufacturing corona-resistant ethylene-propylene rubber insulated power cable, and the product thereof

摘要: A method of manufacturing high voltage carrying electric power cable having a conductor insulated with multilayered covering, and the product thereof. The construction includes primary or dielectric insulating body thermoset ethylene-propylene rubber jacket about conductor, which is substantially free corona-prone ionization-prone voids separations intermediate layers. comprises forming curing compound constituting insulation around then heat treating thermoset-cured prior to applying subsequent components covering condutor, including an overlying semiconductive shielding layer protective enclosing heat-cured polymer. combination highly vapor-permeable coating material adhered surface underlying contiguous superimposed over insulation.