Compressed dielectric gas high-tension circuit breaker
US4754109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Apr 1, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/908
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compressed dielectric gas high-tension circuit breaker comprising: a fixed assembly comprising main contacts and arcing contacts; a moving assembly comprising main contacts and arcing contacts; a blast chamber comprising a piston which moves on separation of the contacts to urge compressed blast gas towards a blast nozzle situated in the zone where an arc is struck; and a thermal volume; wherein the thermal volume is in communication with the downstream portion of the blast nozzle via channels and passages extending the path between the thermal volume and said nozzle, said communication being closed by a calibrated non-return valve which opens only when the pressure in said channels and in said passage reaches a threshold value, said non-return valve closing the passage between the blast chamber and the nozzle when said communication is opened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.