Medium-voltage gas circuit-breaker
US5179257A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1990 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Aug 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/98
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A medium-voltage circuit-breaker comprises a sealed enclosure filled with a dielectric gas and containing a semi-fixed first contact electrically connected to a first terminal and a mobile second contact electrically connected to a second terminal and mechanically coupled to an operating member. The semi-fixed contact is associated with a piston moving in a first cylinder constituting a first volume and provided at one end with a nozzle in which the mobile contact can be inserted when the circuit-breaker is in the engaged (on) position. The piston is acted on by a spring urging it in the direction in which the first volume decreases. The circuit-breaker comprises a system for causing the gas to circulate automatically between the first volume and a second volume when the current to be interrupted reaches a predetermined threshold value. The semi-fixed contact is a tube communicating with a third volume consisting of the remainder of the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.