Cable fault location
US4165482A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1978 |
| Grant date | Aug 21, 1979 |
| Priority date | — |
| Expiry date | Jun 13, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fault in a cable comprising at least two conductors is located by applying a single voltage impulse between two conductors of the cable, passing the resultant current wave form through a primary winding of coupling means which comprises said primary winding and a secondary winding, the primary winding being connected in series between the impulse generator and one of said conductors and which obtains the derivative of said current wave form to give a signal output across the secondary winding, and displaying or recording the signal output. The signal output is a pulse of relatively short duration each time a reflection of the voltage impulse returns to the impulse generator. Preferably a digital transient recorder is used for recording the waveform of the resultant reflected signal from the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.