Vacuum circuit breaker with delayed trip operation
US4180788A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1978 |
| Grant date | Dec 25, 1979 |
| Priority date | — |
| Expiry date | Jul 3, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/0083
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric circuit breaker includes means for providing a predetermined delay between the initiation of a command pulse and the mechanical operation of an element of the circuit breaker in response to the command pulse. In one embodiment, the predetermined delay is provided between a tripping command pulse and the mechanical operation of the trip mechanism of a vacuum circuit breaker. In this embodiment, a translatable armature is coupled to the trip mechanism through mechanical linkage including a flywheel rotatably mounted on a shaft. The shaft is mechanically coupled to the trip mechanism wherein rotation of the shaft operates the trip mechanism. The translatable armature is mechanically coupled to the flywheel so that movement thereof causes the flywheel to rotate through a predetermined rotation. The flywheel includes impact imposing means extending outwardly from a major face thereof. The shaft includes impact receiving means extending radially therefrom. In operation of this embodiment, following the tripping command pulse, the flywheel rotates through the predetermined rotation with a resulting predetermined delay. At the completion of this rotation, the impact imposing me…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.