Solid cable, manufacturing method thereof, and transmission line therewith
US6399878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1999 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Feb 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B9/0688
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cable and cable system is provided having a conductor and an insulation layer on an outer circumference of a conductor. The insulation layer is impregnated with a medium-viscosity insulating oil that has a viscosity of 10 centistokes (cst) to less than 500 cst at 60° C. The insulation layer includes an insulating tape that may be one or a combination of composite tape having a polyolefin resin film laminated with a kraft paper on both its sides and an insulating tape including a polyolefin resin film. The cable includes a metal sheath provided on an outer circumference of the insulation layer, and a reinforcing layer formed on an outer circumference of the metal sheath. The reinforcing layer reinforces the metal sheath by absorbing hoop stress exerted on the metal sheath. The cable system includes a submarine-portion cable and a land-portion cable, an oil stop joint box, and an oil feeding tank. The oil stop joint box connects the submarine-portion cable to the land-portion cable, and the oil feeding tank is connected to the land-portion cable which feeds the medium-viscosity insulating oil to the land-portion cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.