Switching chamber and heavy-duty circuit breaker
US7566842B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2007 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Feb 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/028
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The switching chamber for a heavy-duty circuit breaker has a first arcing contact piece, a second arcing contact piece, a heating chamber, and an insulating nozzle. The first or second arcing contact piece can be moved by means of a drive. The heating chamber is used for temporarily storing quenching gas heated by an arc that may burn between the contact pieces. An insulating nozzle has a throat that is connected to the heating chamber, and which is used for guiding a quenching gas flow. During an opening operation, the two arcing contact pieces reach a maximum relative speed that is at least 1.3 times as great as a relative speed of the two arcing contact pieces. The relative speed being required for capacitive switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.