Design and method for keeping electrical contacts closed during short circuits
US7772943B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Jan 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H89/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical contact assembly resists blow-open under conditions of increased current flow. The contact assembly includes parallel conducting surfaces on fixed and moveable conductors that generate forces biasing the contacts together under current flow conditions. The assembly also includes a magnetic armature and yoke that exert a magnetic force to resist movement of the contacts toward the open position. Current flowing through both the fixed and moveable conductors contribute to the magnetic force. A spring may additionally bias the contacts to the closed position. The contact assembly may be used in remote-controlled circuit breaker applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.