Switchgear arc extinguishing chamber with side walls made of composite material
US6218636A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Dec 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/342
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical arc extinguishing chamber designed to be placed facing separable contacts of a switchgear apparatus and to extinguish the arc generated by separation of the contacts comprises two side walls facing one another and a plurality of spaced apart plates arranged between the side walls and secured by the side walls. The side walls have a stratified composite structure with at least two layers. The layers comprise a polyamide fabric impregnated with thermosetting resin. The chamber thus obtained has advantageous breaking strength properties. The edges of the side walls do not present any dielectric weakness points. The chamber is particularly suitable for low-voltage switchgear of high power ratings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.