Puffer type liquefied-gas self-injection circuit breaker
US4736080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1987 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Mar 4, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/912
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A puffer type liquefied-gas self-injection circuit breaker, used for the interruption at low temperature of a high current carried by a high-voltage power line. The circuit breaker comprises a first fixed contact and a compression chamber. The compression chamber has a bottom part which is fixed and an upper part of which is movable in the axial direction with respect to the bottom part. The upper part of the compression chamber comprises a second contact and an envelope concentrically disposed thereabout. An insulating nozzle is formed in a top portion of the envelope. The internal wall of the envelope is so shaped as to exactly match the external profile of the bottom part of the compression chamber. The breaker is also equipped with a liquefied-gas self-injection system which injects the liquefied-gas from their storage tank via a feed line and valve directly onto the electric arc formed at the moment of current interruption. This system comprises an injection chamber located in the wall of the moving part of the compression chamber. The injection chamber is terminated at one end by a narrow injection channel acting as a nozzle directed towards the electric arc while the other e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.