Heat sink for contact stems of a vacuum interrupter and a vacuum interrupter therewith
US5753875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/6613
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Heat sinks are placed on the contact stems of a vacuum interrupter between the vacuum bottle and junctions with the terminal conductors to lower the temperature of these junctions. The heat sinks are formed by a stack of thin laminations having central openings with inwardly directed tabs which bite into and secure the laminations to the stems. The laminations have aligned slots forming axial passages for cooling air. Preferably, the slots are enclosed to eliminate sharp peripheral edges to reduce the potential for flash over. In one embodiment, the slots are not formed by removing material but by bending it out of the plane of the lamination to maximize heat radiating surface area and to generate turbulent cooling air flow for increased cooling efficiency. An axially extending peripheral lip can provide axial spacing between laminations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.