Medium tension gas blast circuit breaker
US4992634A · kind A · utility
7Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1990 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Apr 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/903
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A medium tension circuit breaker having a dielectric blast gas, the circuit breaker comprising a cylindrical insulating casing filled with dielectric gas under pressure, a fixed main contact, a fixed arcing contact, a fixed blast piston, and moving equipment connected to an operating member and comprising a moving main contact, a moving arcing contact, and a blast cylinder associated with a blast nozzle, wherein the circuit breaker includes a drive piston whose section is not less than 1.3 times the section of the blast piston, the drive piston moving relative to a second cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.