Puffer-type circuit breaker and nozzle emitting gas with coaxial abutting plastic tube
US5739495A · kind A · utility
3Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Nov 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/7076
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compressed-gas circuit breaker is provided with two contacts arranged coaxially opposite one another, at least one of which can be driven to move in the axial direction. The two contacts define in the interrupted state a contact gap. The circuit breaker also has a nozzle, made of insulating material, which is connected to the driven contact and which surrounds at least part of the contact gap. The invention calls for a high-strength plastic tube abutting coaxially against the outside of the insulating nozzle in order to prevent the nozzle from expanding radially as a result of an increase in arc-extinguishing gas pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.