Puffer type gas circuit breaker
US4009458A · kind A · utility
24Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1975 |
| Grant date | Feb 22, 1977 |
| Priority date | — |
| Expiry date | Apr 15, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/166
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a puffer type gas circuit breaker comprising at least a pair of main movable and fixed contacts, a puffer device and a pair of preinsertion resistor contacts inserted electrically in parallel with the main movable and fixed contacts, the preinsertion resistor contacts are closed prior to the closing of the main movable and fixed contacts, and are separated a short time after the main movable and fixed contacts have been closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.