Device for short-circuit protection
US6441709B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2001 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Jan 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/222
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The current-limiting mechanism is provided in particular in order to protect electromechanical contactors from being welded by a short-circuit load. In a first step, the current-limiting mechanism closes a bridging contact of a first bridging current path in order to reduce the current load on the contactor. In a second step, its bridging function is taken over by a switching arc and by a second bridging current path, In the further course of the disconnection process, the switching arc commutates from the bridging contact onto associated running rails or arc runners and runs into an arcing chamber of the current-limiting mechanism. As a result, the short-circuit is interrupted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.