H - Electricity – 01 – B
Patent
H - Electricity
01
B
337/17
H01B 9/02 (2006.01) H01B 3/16 (2006.01) H01B 7/28 (2006.01) H01B 7/282 (2006.01)
Patent
CA 1280181
ABSTRACT OF THE DISCLOSURE A direct current electric cable with a conductor, a semi- conductive screen around and contacting the conductor, a plurality of layers of insulation formed by tapes of insulating material around the semi-conductive screen, a further semi- conductive screen around the layers of insulation and a metal sheath around the further semi-conductive screen, the layers of insulation being impregnated with a non-migrating, insulation composition having a dropping point temperature at least 5°C above the maximum operating temperature of the cable and having an electronegative gas dissolved therein, the gas having a coefficient of diffusion in the composition in the range from 3 x 10-5 to 3 x 10-6 cm2/sec at temperatures below the dropping point temperature of the composition.
542268
Lanfranconi Gianmario
Metra Pietro
Miramonti Gianni
Priaroggia Paolo G.
Lanfranconi Gianmario
Metra Pietro
Miramonti Gianni
Priaroggia Paolo G.
Smart & Biggar
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