Limited flash-over electric power switch
US8063333B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2009 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | May 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/7023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A limited flash-over electric power switch uses a dielectric gas regulator and a flash-over arrestor to greatly diminish the occurrences of high voltage flash-over during operation of a circuit interrupter. The dielectric gas regulator prevents the flow of the dielectric gas into the arc gap during an initial portion of the opening stroke of the interrupter contacts. Once the arc gap is sufficiently wide to greatly diminish the likelihood of a high voltage flash-over, the dielectric gas regulator allows the dielectric gas to flow into the arc gap to extinguish the arc. The flash-over arrestor snubs out incipient flash-over that may occur as the arc attempts to reform across the arc gap. The flash-over arrestor may be a conductive ring located on the interior surface of the nozzle in the region of the orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.