Prysmian Cavi E Sistemi Energia S.r.l.

Cables Pirelli

Cesare Bisleri

Sergio Belli

Alberto Bareggi

Fabrizio Donazzi

Carlo Marin

Jean-Hubert Fondeur

A cable for use in a predetermined voltage class, has a conductor; an insulating layer surrounding the conductor, the insulating layer having a thickness selected to provide a predetermined electrical stress when the cable is operated at a nominal voltage in said predetermined voltage class; and a protective element around the conductor having a thickness and mechanical properties selected to provide a predetermined impact resistance capability, the protective element having at least one expanded polymeric layer. The insulating layer thickness and the protective element thickness are selected in combination to minimize the overall cable weight while preventing a detectable insulating layer damage upon impact of 50 J energy. A method for designing a cable is also disclosed.

Impact resistant compact cable

A fire-resistant and water-resistant low-voltage electrical cable including a conductor and a first internal layer to protect it against water based on a polymer compound containing no halogen, crosslinked or not, and a second layer consisting of a blend of a crystalline propylene homopolymer or copolymer and of a copolymer of ethylene and at least one &agr;-olefin, optionally with a diene, and of an agent having fire retardant properties, the ratio of the thicknesses of the outer layer and the internal layer being from 1 to 7.

Fire-resistant and water-resistant halogen-free low-voltage cables

Growing community of inventors

Cassina de' Pecchi, Italy

Cesare Bisleri