Rotary switch with curved arc root migration track
US4803319A · kind A · utility
7Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1988 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Jun 14, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary switch with a sealed enclosure in which a rotating knife-blade is housed cooperating with two stationary contacts supported by the internal periphery of the enclosure. A permanent magnet is incorporated in the stationary contacts to magnetically blow the arc roots on a curved migration track towards hidden locations which are not facing the knife-blade. The invention is applicable to a gas-insulated medium voltage switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.