Gas-insulated bushing
US4424402A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B17/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved gas-insulated bushing having a high withstand voltage and an increased capacity to cool a conductor, wherein the upper end portion of a potential-controlling capacitor in the form of a stopped tube is directly airtightly fitted to the outer surface of the central conductor, thereby enlarging a distance between the capacitor and the inner wall of the porcelain insulator and elevating the withstand voltage of the bushing; an internal pipe open at the bottom is inserted into the central conductor; the upper portion of the internal pipe communicates with a cooling case provided at the top of the porcelain insulator; a cooling gas is circulated through a route consisting of the cooling case, a space defined between the outer wall of the internal pipe and the inner wall of the central conductor and the interior of the internal pipe; and a cooling mechanism completely separated from an insulation gas chamber is provided in the central conductor, thereby enabling a cooling gas having a higher cooling capacity than an insulaton gas to be applied and elevate the cooling capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.