Medium tension circuit-breaker
US5155313A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A medium tension circuit-breaker has a gastight insulating case filled with a gas having good dielectric properties. A semi-moving arcing contact is electrically connected to a first terminal and a moving contact is mechanically connected to a drive mechanism and electrically connected to a second terminal. The semi-moving arcing contact is connected to a piston movable in a blast volume delimited in particular by the inside wall of an insulating cylinder which is inside the case and by a first face of a blast nozzle. The piston receives thrust from a spring in which energy is stored when the circuit-breaker is in the engaged position. The circuit-breaker includes a thermal expansion volume delimited in particular by the inside wall of the cylinder, by a second face of the nozzle, and by a transverse partition through which the moving contact slides. When interrupting high currents, once the piston has completed its stroke in the direction of compression of the blast volume, the piston is prevented from moving back in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.