Ground fault detection method and system
US11555862B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 29, 2020 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | May 29, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure provides a method and system for ground fault detection. The method may include obtaining an input voltage and a null-ground voltage; determining whether the null-ground voltage is less than a voltage threshold; if yes, further determining whether the null-ground voltage is less than a preset voltage; if yes, determining that the grounding state is normal; if the null-ground voltage is greater than or equal to the preset voltage, determining that the grounding state is abnormal; if the null-ground voltage is greater than or equal to the voltage threshold, determining that the live wire and the null wire are reversed; in the case that the live wire and the null wire are reversed, determining whether the difference between the input voltage and the null-ground voltage is less than the preset voltage; if yes, determining that the grounding state is normal; if no, determining that the grounding state is abnormal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.