Arc-quenching device for circuit breakers having double-break contacts
US7081596B2 · kind B2 · utility
12Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2004 |
| Grant date | Jul 25, 2006 |
| Priority date | — |
| Expiry date | Dec 9, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H73/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an arc-quenching device for circuit breakers having double-break contacts for use in low-voltage distribution systems. Provided around a prechamber (41) is a magnetic shield (91) for the purpose of intensifying the magnetic blowing action on an arc formed between the arc guide rails (51, 61) of the prechamber. In addition, a blowing loop (81) is inserted in the arc-quenching circuit and extends in sections parallel to an arc guide rail (61). Prechamber insulation having a bulge constricting the arc area likewise serves the purpose of optimizing the arc run.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.