Method of detecting faults on low voltage distribution electric

Details Method of detecting faults on low voltage distribution electric Method of detecting faults on low voltage distribution electric

1977-03-21

1978-08-29

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324102, G01R 3108, G01R 1916

Patent

active

041106849

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.

REFERENCES:
patent: 3633101 (1972-01-01), Johnson
patent: 3662380 (1972-05-01), Cargile
patent: 3771049 (1973-11-01), Piccione
patent: 3816815 (1974-06-01), Schumann
patent: 3836851 (1974-09-01), Schumann
Hedges, Charles P., Digital Recorder Holds Data After Shock, Electronics, Mar. 20, 1959, pp. 60-62.

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