Method and apparatus for detecting a fault location at an electrical conductor
US3983377A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of, and apparatus for, detecting a fault location at an electrical conductor which entails forming a wave voltage and therefrom together with a measurement voltage a first wave function and a second wave function. Weighted functions are formed by multiplication of the first and second wave functions with a substantially cosine-type and sine-type signal, respectively, of a predetermined reference frequency. Integral functions are formed from the weighted functions. There is formed the product difference from those integral functions produced by cosine and sine weighting, respectively, of the first and second wave functions and integration, and/or the product sum from those integral functions formed by cosine weighting of the first and second wave functions or sine weighting of the first and second wave functions, respectively, and there is checked the sign of at least one of such product polynomials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.