Directional wave detector apparatus
US4351011A · kind A · utility
43Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1981 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | May 1, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/265
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In directional wave detector apparatus for electrical power line relay protection devices determining the direction to a fault, the current and voltage of the travelling waves generated by a fault point are combined at a measuring point and the sign of the combined signal is determined. A tripping or blocking signal is emitted depending on whether the sign of the combined signal indicates that the fault lies within or outside the range protection of the relay protection device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.