Economizer failure detection and bit method circuits
US11791621B2 · kind B2 · utility
0Cited by
16References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2020 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | May 14, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2047/009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method includes detecting a failure in a contactor economizer that is configured to provide a first current to a coil of a contactor to close the contactor, and to provide a second current lower than the first current to the coil after the contactor is closed to hold the contactor closed. The method includes at least one of: driving contactor actuation based on economizer failure status; and/or signaling failure of the economizer through built in test (BIT) indication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.