Switching method for an electromagnetic switching device and an electromagnetic switching device corresponding thereto
US6833777B2 · kind B2 · utility
5Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2002 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | May 1, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H73/045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The aim of the invention is to protect an electromagnet switching device when a load is switched to a supply voltage. A current that flows through the load contact is monitored. The electric circuit is interrupted when the current exceeds a threshold value that is below the current carrying capacity of the load contact. The electric circuit is automatically closed again after the current which flows through the load contact has decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.