Electricity: conductors and insulators – Conduits – cables or conductors – Conductive armor or sheath
Reexamination Certificate
2003-06-05
2009-02-10
Nguyen, Chau N (Department: 2831)
Electricity: conductors and insulators
Conduits, cables or conductors
Conductive armor or sheath
C174S12000C
Reexamination Certificate
active
07488892
ABSTRACT:
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.
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Meurer et al., “Reduced Insulation Thickness for Extruded Medium-Voltage Power Cable Systems- Cable Performance and First Netwrok Applications”, 2001 IEEE, pp. 819-824.
Bareggi Alberto
Belli Sergio
Bisleri Cesare
Donazzi Fabrizio
Marin Carlo
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Nguyen Chau N
Prysmian Cavi e Sistemi Energia S.R.L.
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