Circuit breaker having dual arc chamber
US8735758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2010 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Sep 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H73/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker which includes first and second contact pairs and a contact arm arranged in series. A first arm contact and a first terminal contact from a first line terminal form a first contact pair. A second arm contact and a second terminal contact from a second line terminal contact form a second contact pair. The first contact pair, contact arm and second contact pair are connected in a series arrangement in which the air gaps formed when the first and second contact pairs are separated combine to form an effective air gap which is double in size and thus increases an interrupting capacity of the circuit breaker. An arc chamber is associated with the first and second contact pairs for extinguishing an arc formed in the air gaps. The first and second contact pairs may also be arranged in a parallel configuration for increasing an amperage rating of the circuit breaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.