Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode used therefor
US6248969A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1998 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Sep 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/0206
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a vacuum circuit breaker including a small-sized electrode structure capable of reducing deformation with age thereby enhancing the reliability and a vacuum bulb and a vacuum bulb electrode used for the breaker. In the vacuum circuit breaker, each of a fixed electrode and a movable side electrode includes an arc electrode made from particles of a refractory metal material, a high conductive metal material and a low melting point metal; an electrode supporting portion, made from the high conductive metal material, for supporting the arc electrode; a back conductor having a diameter smaller than the electrode supporting portion; and an external side connecting portion having a diameter larger than that of the back conductor. The arc electrode is integrated with the electrode supporting portion, back conductor, and external side connecting portion by the high conductive metal material, preferably, by melting of the highly conductive metal material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.