Apparatus for and method of ground fault detection
US7233464B2 · kind B2 · utility
1Cited by
8References
22Claims
0Family size
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Inventor
Key dates
| Filing date | Jan 9, 2004 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Apr 28, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ground fault detection system is provided where one current sensor is used to calibrate a second sensor in order to provide automatic zeroing of the difference measurement. The calibration is done gradually in order to differentiate between sensor drift and a transition in current due to a differential fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.