High-voltage electrical apparatus utilizing an insulating gas of sulfur hexafluoride and helium
US4190733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1977 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Jun 21, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02B13/055
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
High-voltage electrical apparatus includes an outer housing at low potential, an inner electrode disposed within the outer housing at high potential with respect thereto, and support means for insulatably supporting the inner electrode within the outer housing. Conducting particles contaminate the interior of the outer housing, and an insulating gas electrically insulates the inner electrode from the outer housing even in the presence of the conducting particles. The insulating gas is comprised of sulfur hexafluoride at a partial pressure of from about 2.9 to about 3.4 atmospheres absolute, and helium at a partial pressure from about 1.1 to about 11.4 atmospheres absolute. The sulfur hexafluoride comprises between 20 and 65 volume percent of the insulating gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.