Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
US7417836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2007 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Aug 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The aircraft applicable current imbalance detection and circuit interrupter interrupts an electrical circuit when a current imbalance is sensed. The current imbalance detection and circuit interrupter includes a housing, power supplies, a sensor system for sensing a current imbalance at the line side of the electrical circuit, a logic controller and a power controller including a power relay having contacts capable of surviving carry-break and make-carry-break types of ground fault conditions at anticipated current levels. At power up, the device performs a test to confirm that none of the relay contacts have failed in a closed position, and to check whether a switching FET which controls the relay coil has shorted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.