Surge arrester assembly
US5317473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Aug 31, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T4/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a surge arrester assembly with a plurality of parallel-connected arrester units (1) with polymer casing mounted in a rack. The lower and upper parts of the rack consist of bars (4a, 4b) of, for example, aluminium, which are included in the electric circuit. The bars are retained by, for example, support insulators (6) of porcelain or polymer material. The mechanical retention of the stacks of ZnO blocks of the arrester units (1) and the necessary contact pressure between the blocks are ensured by the rack structure. The electrical connections (23, 24) to the rack are arranged in such a way that, if a fault causing a short circuit in one of the block stacks occurs, the arc produced is blown by the current forces along the bars to the opposite end, where arcing horns (38) of a current-resistant material, for example steel, are arranged and where the arc may burn in a controlled manner without involving a risk to the environment. (FIG. 1 )
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.