Switch device having an insulating screen inserted between the contacts during breaking
US4677266A · kind A · utility
15Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Nov 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switch in which a screen inserted between the contacts shears the opening arc. The screen is associated with a sheath that surrounds a contact support and slides on the latter when the gas pressure it is subjected to causes it to move at a velocity which is a function of the energy of the arc. The switch is applicable in particular to protective apparatus designed to limit fault current or breaking devices in which steady-state current is fairly high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.