Safety switch
US10937611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Dec 2, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety switch device configured to perform at least one of connecting a load to a power supply and disconnecting the load from the power supply is provided. The safety switch device comprises a first set of two serially connected controllable switching elements; a safety circuit to verify a switching state of the first set of two switching elements, wherein each switching element of the first set of two switching elements is configured as a toggle; a control circuit configured to provide a test signal to the safety circuit; and decoupling means configured to galvanically decouple the load circuit from the control circuit. The decoupling means comprise a transformer, and the control circuit comprises a transformer driver configured to provide the test signal to the safety circuit via the transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.