Vacuum arc switching device with internal shielding
US4215255A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1978 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Jan 5, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/66292
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum arc current switching device employs a shielding arrangement including a plurality of coaxially disposed cylindrical non-conducting members for minimizing exposure of the interior wall surfaces of the enclosure to vapor deposition of cathode material so as to prevent the formation of secondary arc terminals on the interior surfaces of the enclosure. The shielding being non-conducting prevents secondary arc formation which would otherwise permit arcing from the cathode to the shield and then back to the anode. The shielding further comprises annular transverse members disposed at the ends of the enclosure so as to protect the end wall surfaces as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.