Switching device with antiarcing screen
US4647741A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Dec 31, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to a switching device which comprises a casing provided with an input terminal, an output terminal and, therebetween, an electric circuit including at least two separable contacts as well as a rotary screen presenting an interposable annular sector between the contacts and displaceable vis-a-vis a wall comprising an opening for the passage of at least one of the contacts. The wall delimits in the casing two volumes as well as a lamellar space enabling to provide for the rolling and cooling of the arc. The space communicates with a chamber which enables the gas expulsion with expansion to the chamber. The invention enables to obtain a simple and inexpensive way of reliably breaking the arc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.