Electromagnetic switching device
US6150909A · kind A · utility
23Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H77/101
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic switchgear unit has an electromagnetic drive appliance which acts as an auxiliary magnet system and by means of which the contact force is first increased on the occurrence of a short-circuit current, before the contacts are abruptly torn apart. For this purpose, the drive appliance actuates a lever rotatably supported on the contact bridge carrier, which lever displaces the contact bridge carrier and, by this means, compresses a contact compression spring and a further compression spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.