Voltage loss sensor and alarm

Details Voltage loss sensor and alarm Voltage loss sensor and alarm

1983-07-29

1985-10-29

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

340664, G01R 1914

Patent

active

045502889

ABSTRACT:
A sensor for monitoring loss of voltage on a monitored conductor includes first and second capacitors, each of which is charged by a rectifier circuit which derives operating power from the monitored conductor. Upon loss of voltage on the conductor, a discharge circuit discharges the first capacitor, while allowing the second capacitor to remain charged. When the voltage difference between the two capacitors exceeds a predetermined threshold level, an SCR discharge circuit discharges the second capacitor to provide an output signal.

REFERENCES:
patent: 3524133 (1970-08-01), Arndt
patent: 3969710 (1976-07-01), Arima
patent: 3991366 (1976-11-01), Schweitzer, Jr.
patent: 4152643 (1979-05-01), Schweitzer, Jr.
patent: 4234847 (1980-11-01), Schweitzer, Jr.
patent: 4424512 (1984-01-01), Schweitzer, Jr.
patent: 4438403 (1984-03-01), Schweitzer, Jr.

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