Fault monitoring by detecting a polarity difference

Details Fault monitoring by detecting a polarity difference Fault monitoring by detecting a polarity difference

1981-03-20

1983-05-24

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 52, 324133, G01R 3102

Patent

active

043852718

ABSTRACT:
In a system for continuously monitoring partial discharge in high voltage electrical equipment thereby to give advance warning of impending breakdown of solid-insulated components, means are provided to distinguish electrical signals indicative of partial discharge from those resulting from noise or external transients. Current pulses in the various partial discharge paths are detected, and by solid-state circuitry their relative polarities are compared and an appropriate signal is made according to the comparison.

REFERENCES:
patent: 3176285 (1965-03-01), Neeman
patent: 3746981 (1973-06-01), Stone
patent: 3931502 (1976-01-01), Kohlas
patent: 4362986 (1982-12-01), Burke

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