Gas blast circuit breaker
US3941962A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1973 |
| Grant date | Mar 2, 1976 |
| Priority date | — |
| Expiry date | Nov 29, 1993 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/888
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas blast circuit breaker has fixed and movable contact sets, the latter mounted on a cylinder slidable on a fixed piston to generate a gas blast on separation of the contact sets. Each contact set consists of radially inner and outer contacts, the inner contacts separating later than the outer. A gas blast nozzle mounted on the cylinder and between the radially inner and outer movable contacts has a throat downstream of the inner contact, communicating with the interior of the cylinder by way of an inner duct containing the inner contact, and an annular outer duct, so arranged that on separation of the contacts relatively cool fresh quenching gas is directed through the inner duct over the inner contact and arc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.