Circuit-breaker having low self-compression
US5600111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/908
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit-breaker including two arcing contacts that co-operate with each other, at least one of which is part of a moving contact assembly that is secured to a drive member and that is constituted by a first tube carrying the moving arcing contact at its end, and by a second tube that is coaxial with the first tube so as to define firstly an expansion chamber on one side of an annular wall, and secondly a compression chamber on the other side of the annular wall, the compression chamber being closed by a piston. A compression device is provided for compressing the gas in the compression chamber during a first portion of the displacement of the moving contact assembly, and a pressure-reducing device is provided for reducing the pressure of the gas in the compression chamber during a second portion of the same displacement of the moving contact assembly. The compression device comprises the fixed piston that co-operates with the first tube over a certain travel distance x, and the pressure-reducing device includes a device for exhausting the gas contained in the compression chamber from the compression chamber, and which operates once the distance x has been travelled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.