Prysmian S.p.a.

Gianni Miramonti

Paolo Veggetti

Enrico Maria Consonni

Luca Giorgio Maria De Rai

Mauro Maritano

Sergio Montagner

A cable has a tensile armor having a number of elongated polymeric tensile elements. At least one of the elongated polymeric tensile elements includes a bundle of high tensile fibers and a jacket tightly retaining the bundle of fibers. The elongated polymeric tensile elements are arranged with a lay loss of 1.5% at most. A method of manufacturing such a cable is also disclosed.

Cable with lightweight tensile elements

A high voltage electric cable having a longitudinal axis may include: a conductive core having a first cross sectional area; wherein the conductive core includes a solid, central conductor, and at least three solid, sector conductors stranded around the central conductor. The central conductor may have a second cross sectional area. A ratio of the second cross sectional area to the first cross sectional area may be of from 1/130 to 1/20.

Electric sector cables

A high voltage direct current cable includes at least one electrical conductor, at least one semiconducting layer, at least one stratified insulation made from windings of at least one paper-polypropylene laminate, the stratified insulation being impregnated with at least one electrically insulating fluid having a kinematic viscosity of at least 1,000 cSt at 60EC, wherein the laminate includes at least one paper layer having an air impermeability of at least 100,000 Gurley sec. Such a high air impermeability of the paper layer(s) remarkably reduces the swelling of the polypropylene layer(s) during impregnation with a high viscosity insulating fluid, thus preventing delamination, up to the end of the impregnation process for the whole stratified insulation.

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Milan, Italy

Gianni Miramonti