Magnetic enhanced arc extinguisher for switching assemblies having rotatable permanent magnets in housings mounted to fixed contacts
US6064024A · kind A · utility
23Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/443
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC contactor has stationary and movable contacts. A magnet is rotatably mounted adjacent to the stationary contact within a self magnetic field produced by the flow of electric current in the stationary contact. The magnet rotates so that its magnetic field extends around the stationary contact in the same direction as the self magnetic field. When an arc forms between the stationary and movable contacts, interaction with the self magnetic field and the magnetic field drives the arc toward an adjacent extinguishing chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.