Safety circuit arrangement for failsafe shutdown of an electrically driven installation
US10847963B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2017 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Sep 9, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H5/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Safety circuit arrangement for failsafe shutdown of an electrically driven installation, comprising a safety switching device, having a safety switching relay that is configured to close or disconnect a power supply path to the installation in a failsafe manner, and a signaling device, having an actuator and a signal generator that is connected to the safety switching device by a first line. The actuator of the signaling device is interchangeable between first and second defined states and the signal generator is configured to generate a first clock signal on the first line only when the actuator is in the first defined state. Furthermore, the safety switching device is configured to draw electrical power from the first clock signal that is greater than or equal to the defined actuating power of the safety switching relay and to convert said electrical power to direct current for actuating the safety switching relay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.