Ground fault detection system
US6678132B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Sep 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fault detection system for detecting an unwanted electrical path between a reference potential and at least one of: a) a floating power source, b) a first power conductor coupled to a first terminal of the power source, and c) a second power conductor coupled to a second terminal of the power source. The system comprises an impedance network electrically coupled to the first and second power conductors and having an output terminal for providing a first voltage signal with respect to the reference potential, and an amplifier circuit responsive to the first voltage signal and to a reference voltage for generating an amplified signal indicative of the existence of the unwanted electrical path when the difference between the first voltage signal and the reference voltage exceeds a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.