Relay configuration
US6301091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Apr 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety relay configuration for linking a power source to a device to be powered via at least one output wherein output contacts all have to be closed to provide power to the device, the configuration including first and second three contact relays or four contact relays, each relay including a first NC contact and at least two NO contacts and, wherein the second relay first contact is linked in parallel with the first relay second contact forming a first parallel configuration, the first relay first contact is linked in parallel with the second relay second contact forming a second parallel configuration, the first parallel configuration is linked in series with the first relay coil between the power source and ground, the second parallel configuration is linked in series with the second relay coil between the power source and ground and the relay third contacts are linked within the outputs between the power source and the device. Where the relays have four contacts, the relay fourth contacts are linked within the outputs between the power source and the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.