Control device for actuating at least two items of switchgear in co-ordinated manner, one of which items performs interruption in a vacuum
US7563161B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Feb 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/6661
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The control device comprises a vacuum first item of switchgear (1) which includes a pair of contacts (5, 6) that can be separated for interruption purposes. It also includes a main drive shaft (2) for actuating a second item of switchgear (10) immersed in a gaseous insulating fluid (G2) contained at a determined pressure (P2), and further includes an auxiliary shaft (4) to enable a moving contact (5) of the first item of switchgear (1) to be driven. The auxiliary shaft (4) passes in leaktight manner through a wall (7A, 7′) which separates the volume of gaseous insulating fluid (G2) from another volume (V1) of fluid (G1) at a lower pressure, the difference between the respective pressures (P2, P1) of the two fluids (G2, G1) procuring a certain force (Fp) which is applied to said auxiliary shaft (4) and which participates in said contact pressure force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.