Sulfur hexafluoride circuit-breaker for operating in a very low temperature environment
US4711978A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1987 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Jan 29, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sulfur hexafluoride circuit-breaker for operating in a very low temperature environment, the circuit-breaker being of the type comprising a sealed enclosure filled with sulfur hexafluoride and closed by first and second end plates, a set of fixed contacts, a set of moving contacts driven by an operating rod, a blast volume which is mechanically compressed when the operating rod is displaced to open the circuit-breaker, and blast nozzle for directing the said compressed gas from said volume onto the arc, the circuit-breaker including the improvement of means for creating an arc in said blast volume during a portion of the time that the moving assembly is moving, by diverting the current to be interrupted so that it flows through two parts constituting two electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.