Surge arrester
US6614640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Oct 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The surge arrester has an arrester housing, two electrical power connections (16, 17) which are routed out of the arrester housing, and at least one varistor, which is arranged in the arrester housing (1, 2), is in the form of a disc and has two contact points which are provided on the end faces. The contact points are each electrically conductively connected to one of the two electrical power connections (16, 17).The varistor contains a non-metallized active part (12) and two elastic contact elements (11, 13) which are pressed against the end faces of the active part (12), forming an electrical contact. The end surfaces (12a, 12b) may be convex or concave instead of being plane-parallel and, if they are in the desired plane-parallel form, form a small angle with respect to one another. The elastic contact elements (11, 13) and the non-metallized end surfaces (12a, 12b) allow good electrical contact in all cases. Since, during manufacture of the active part, the geometric tolerance limits can be kept relatively wide, the surge arrester can be produced extremely cost-effectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.