Vacuum switchgear
US8247725B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2009 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Aug 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/6667
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum switchgear has a vacuum valve including a movable conductor connected to an insulating rod, and a fixed conductor connected to a bus bar or to a load cable, a vacuum chamber encasing the vacuum valve, an insulating envelope covering the vacuum chamber, the outer surface thereof being covered with an electro-conductive layer thereby to earth the envelope, and an insulating lid gas-tightly fitted to the insulating envelope. The lid has an insulating bushing through which an insulating rod penetrates, the insulating rod being connected to an operating mechanism, wherein the insulating rod except a portion exposed from the bushing is gas-tightly confined in insulating gas atmosphere formed between the insulating envelope and the insulating lid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.