Innovative 11–25kV aluminum-steel overhead conductor

During the last decade the cost of copper and aluminium base metal has risen and challenged Energy Utilities in developing alternative cost-effective technological solutions. Enel SpA, together with Cesi Ricerca SpA and two accredited manufacturers (Tratos Cavi SpA and De Angeli Prodotti SpA), engineered an innovative MV overhead bare conductor made of annealed aluminium, extruded around a supporting steel core. In this paper we will illustrate the new conductor with the more traditional overhead conductor types and its economical and environmental benefits and drawbacks..