Multi-conductor high voltage cable, in particular three-conductor cable
US4870226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Mar 22, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Multi-conductor high voltage cable, in particular a three-conductor cable, each conductor having an extruded polyolefin conductor insulation, said cable further comprising an extruded polyolefin belt insulation surrounding all insulated conductors and an electrically conducting sheath, surrounding the belt insulation. According to the present invention the conductor insulation of each conductor is surrounded by at least one tape or layer of material comprising cells or cavities and/or at least one tape or layer of material comprising cells or cavities is applied between the belt insulation and all insulated conductors. Preferably said tape or layer is formed by swelling tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.