Vacuum envelope for current limiter
US4276455A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1977 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | Aug 5, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/664
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved envelope for a vacuum device circuit interrupter of the type having a pair of relatively movable electrodes within a vacuum envelope and including magnetic field arc suppression. The envelope includes end portions which support the electrodes and an intermediate insulating portion which surrounds and is spaced from the electrodes. Means for producing a magnetic field is outside the envelope. The insulating portion is of a shape which provides a greater distance between the electrodes and the surrounding insulating portion in the direction in which an interelectrode arc is deflected by the magnetic field. In the preferred embodiment the insulating portion is substantially cylindrical in shape with a pair of protruding side tubes. The interrupter envelope is oriented so the arc is deflected down the inside of the side tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.