Vacuum switching tube for low-voltage and medium-voltage switches, particularly for vacuum contactors
US5315081A · kind A · utility
1Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Mar 31, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/66223
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum switching tube contains a switching chamber and a first contact piece fixed in place in it, as well as a movable current conducting rod with a second contact piece and a ring-shaped insulator. According to the present invention, the ring-shaped insulator has at least one end surface on the vacuum side, which is at least partially free of metallization, and which faces away from the metal vapor formed during switching and is therefore protected against condensation. It is advantageous if a gap with a pre-determined length and height is formed by the end surface of the insulator and by at least one adjacent metallic flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.