Safety switching apparatus for safely disconnecting an electrical load
US7239048B2 · kind B2 · utility
2Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Mar 31, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety switching apparatus for safely disconnecting an electrical load, such as an electrical machine, has at least one output switch with at least two switching positions. The output switch is for interrupting an external power supply path to the load. The safety switching apparatus further has a control unit which controls the switching position of the output switch. The control unit is capable of monitoring the actual switching position of the output switch by means of an RF test signal which is transmitted from an RF generator to the output switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.