Method and apparatus for locating a fault on a line
US4128805A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1977 |
| Grant date | Dec 5, 1978 |
| Priority date | — |
| Expiry date | Mar 14, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/382
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of, and apparatus for, locating a fault on a line, wherein current and voltage signals weighted relative to one another are formed from measurement signals corresponding to the line current and line voltage at a measurement location and after superimposing are used for a phase detection. At least one of the current signals or voltage signals is multiplied by a weighting factor at least approximately devoid of phase shift. From mutual relatively weighted current- and voltage signals there is determined the phase angle of a sinusoidal component of at least one auxiliary signal -- corresponding to the sum or difference of a respective pair of mutually relatively weighted measurement currents and measurement voltages -- in relation to a reference phase position which can be correlated to a reference location at the line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.