Method and apparatus for the identification of a faulty conductor in a multiple supply line
US4833414A · kind A · utility
6Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1986 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Dec 3, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of and apparatus for determining which if any phase of duplex supply lines wherein each phase w is assigned two conductors w1 and w2. The method and apparatus use an asymmetry value, for example a function of the relationship (output of 9) of the difference Iw1-Iw2 (output of 5) to the sum Iw1+Iw2 (output of 6) of the currents in the conductors w1 and w2. If the asymmetry level exceeds in absolute value a threshold level K(see 12 and 13), the conductor passing the current having the lowest amplitude is indicated as being sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.