Method and apparatus for locating resistive faults in communication and power cables
US5990686A · kind A · utility
Inventors
Key dates
| Filing date | Jun 18, 1996 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Jun 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/088
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resistive fault location method and apparatus are used on communication and power cables. Two instruments are connected to opposite ends of the faulted conductor. Each takes a series of voltage and current measurements that are then processed to determine the distance from each end of the conductor to the fault. To eliminate voltage and current transients, the data collected is statistically analyzed and data that is analyzed as being affected by transients is discarded. The remaining data is taken as being steady state data. This eliminates any requirement for simultaneous measurements at opposite ends of the conductor and accounts for any situation where local transients at the two ends of the conductor are different at any given instant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.