Distribution line ground fault prevention with blown fuse protection on single phase
US12407184B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 2024 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Nov 4, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H5/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for preventing ground fault or other short circuit in electric distribution line system, caused by a break in a line, utilizing programmable relay protection in a plurality of relay devices programmed to monitor high sensitivity parameters, includes blown fuse protection in a single phase tap line to prevent false operation of the open conductor logic when a tap line fuse successfully interrupts a short circuit on the tap line, which includes: blown fuse protection subsystem having relay devices on the tap lines (vis transformers) that have microprocessors programmed to detect changes in negative sequence overcurrent on a single phase tap line, to calculate the change in negative sequence overcurrent, to store a preset acceptable range for change of negative sequence overcurrent, to compare the calculated change in negative sequence overcurrent to the preset acceptable range for change of negative sequence overcurrent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.