Gas-blast electric circuit interrupter of the puffer type
US4045633A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1975 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jun 27, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/908
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas-blast interrupter of the puffer type comprises a piston positively connected to the movable contact rod of the interrupter and means defining a pumping space at one side of the piston containing gas compressed by piston motion during an opening operation. At the opposite side of the piston there is a working space in which compressed gas can act upon the piston to aid an opening operation. A blast passage is provided through which gas from the pumping space can flow into the arcing region. An auxiliary passage affords communication between this blast passage, and said working space. Valve means effective during a low current interruption blocks flow through the auxiliary passage and allows free communication between the pumping space and the blast passage, whereby during a low current interruption, compressed gas from the pumping space can flow into the arcing region via the blast passage. The valve means is effective when pressure in the arcing region is high during high current interruptions: (i) to allow arcing products to flow through the auxiliary passage into the working space and (i.i.) to block free communication between the pumping space and the blast passage, thus d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.