Electricity: conductors and insulators – With fluids or vacuum – Conduits – cables and conductors
Patent
1994-12-20
1996-11-05
Kincaid, Kristine L.
Electricity: conductors and insulators
With fluids or vacuum
Conduits, cables and conductors
174 28, 174 682, 174 99B, H02G 506
Patent
active
055719902
ABSTRACT:
A gas-insulated single-phase cable for long-distance transport of electricity under high tension, the cable including a cylindrical steel case filled with nitrogen under a pressure of at least 10 hectopascals, an aluminum- or copper-based metal conductor held axially inside the steel case by closed insulating cones, and an aluminum case disposed at a short distance from the steel case and constituting a magnetic screen protecting the steel case from the magnetic field generated by the current carried by the conductor. The steel case is separated from the aluminum case by rings of plastics material or of filled polymer, such as polytetrafluoroethylene. Each rings is placed in a groove in a metal collar, with two adjacent portions of the aluminum case being welded to the collar.
REFERENCES:
patent: 3646245 (1972-02-01), Swerdlow
patent: 3652778 (1972-03-01), Sakai
patent: 3792220 (1974-02-01), Yoshioka et al.
patent: 4161621 (1979-07-01), Bolin et al.
patent: 4316052 (1982-02-01), Matsuda
patent: 4458100 (1984-07-01), Cookson et al.
patent: 5089665 (1992-02-01), Thuries
Pham Van Doan
Tixier Rene
GEC Alsthom T & D SA
Kincaid Kristine L.
Nguyen Chau N.
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