Method and apparatus for fault direction determination
US4308565A · kind A · utility
3Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | May 14, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/382
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for fault direction determination is disclosed wherein a capacitor is connected in series in a line or network having a relay arrangement or scheme possessing directional and distance characteristics. To prevent faulty tripping of the relay arrangement, caused by the effect of the series capacitance in the line, the relay arrangement is structured such that the integrity of the directional characteristics thereof is maintained. Positive tripping of the relay is maintained, especially in the event of near faults which usually are most affected by the action of the series capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.