Permanent magnet rotating arc switch
US4424428A · kind A · utility
3Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1981 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Apr 2, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention concerns a rotating arc switch using a permanent magnet (38) arc blow-out. The permanent magnet is housed inside the fixed contact (16) and is thermally and electrically isolated from it by an insulating layer (46). The permanent magnet (38) is placed against the annular contact (36) surface, very close to the breaking zone, and has a cavity (40) opposite the central opening of the annular surface (36). The magnetic blow-out is combined with a pneumatic blow out by escape of the warmed gases towards an expansion chamber (36).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.