Gas insulation switch
US6292356A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Mar 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/566
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas insulation switch has a container charged with insulating gas which contains an electric conductor and at least a pair of contactors. The container is divided into a plurality of sections. For the sections which have no switching devices or separable contactors, a different insulating gas is used as compared with that for the sections having breakers or separable contactors. In particular, in the section of the container, such as a grounding tank, that contains only electric conductors without separable contactors, an insulating gas having a smaller earth warming coefficient or global warming coefficient than that of SF.sub.6 gases is used. On the other hand, for the section of the grounding tank which contains a breaker or switch having separable contactors, an SF.sub.6 insulating gas is used. Since SF.sub.6 gas is known to have a high earth or global warming coefficient, as compared with air or nitrogen gas, the SF.sub.6 gas is only used as the insulating gas in the grounding tank for the sections in which superior arc extinguishing performance is required. Accordingly, the gas insulation switch has a reduced requirement for SF.sub.6 gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.