Switching circuit for monitoring the switching state of switch elements
US4323890A · kind A · utility
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6Claims
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Key dates
| Filing date | May 5, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | May 5, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/167
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching circuit for monitoring the switching state of switching elements wherein the switching state of the switching element is detected and a corresponding signal is generated and this signal is compared to the input signal initially provided for switching the switching element from one switching state to another whereby a fault signal is produced when the switching state monitor signal indicates that the switching element is in one switching state and the input signal indicates that the switching element is or should be in another switching state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.