Method of detecting faults on low voltage distribution electric cables utilizing a plurality of transient recorders
US4110684A · kind A · utility
23Cited by
5References
3Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 21, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Mar 21, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For detecting faults on low voltage alternating current electric power distribution cables, recorders are provided, each triggered by a selected occurrence, e.g. a decrease in signal amplitude or a change in the waveform, to cease recording, after a short delay, of the waveform data in digital form, so that a store holds digital data enabling the waveform of the last few cycles covering the period before and after the selected occurrence. Using a voltage gradient technique analysis of the data enables the position of the fault to be located.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.