Common mode current feed fault protection
US12123905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2022 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Jan 20, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2310/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system includes a generator. Three AC feeders are connected for feeding AC output from the generator. A rectifier is electrically connected to the three AC feeders and to a load via a first DC feeder and a second DC feeder. A first resistor connects between a the first DC feeder and ground. A second resistor connects between the second DC feeder and ground. At least one of a first current sensor is operatively connected to detect current in the first DC feeder and/or a second current sensor is operatively connected to detect current in the second DC feeder. A controller is configured to monitor for changes in common mode current based on the input from the at least one current sensor, and to determine presence of a fault if change in the common mode current exceeds a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.