Checking apparatus for checking operation of a densimeter for medium-voltage and high-voltage electrical equipment, and a method of checking operation of a densimeter
US7937985B2 · kind B2 · utility
8Cited by
9References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2007 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Sep 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/563
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Checking apparatus for checking operation of a densimeter for medium-voltage or high-voltage equipment having metal casing (4) that is filled with a dielectric gas under pressure; the apparatus comprises a closed chamber (8) suitable for being put into communication with an internal space (5) of the casing (4), and isolation means (10) for isolating the chamber (8) in gastight manner from the internal space (5), in which apparatus said closed chamber (8) has a volume that can be caused to vary, and in which apparatus the densimeter is suitable for detecting at least one pressure threshold in said chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.