Ground fault current rectification and measuring circuit

Details Ground fault current rectification and measuring circuit Ground fault current rectification and measuring circuit

1989-04-04

1990-08-07

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

307321, 324522, 324119, 363126, G01R 3114

Patent

active

049471260

ABSTRACT:
An apparatus for monitoring alternating currents and providing a signal representative of the current. The signals are rectified by a modified full wave rectrifier to provide a power source, a positive signal associated with the positive range of the current, and a positive signal associated with the negative range of the current. The two positive signals serve to preserve the polarity information associated with the current being monitored. The apparatus also provides for combining the negative signals to produce other signals useable by a microprocessor and an analog logic circuit.

REFERENCES:
patent: 3887867 (1975-06-01), Safer et al.
patent: 4121269 (1978-10-01), Hobson, Jr.
patent: 4234900 (1980-11-01), Miyazaki et al.
patent: 4631625 (1986-12-01), Alexander et al.
patent: 4758919 (1988-07-01), Stewart
patent: 4761704 (1988-08-01), Fraisse et al.

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