Unbalanced DC voltage detecting circuit

Details Unbalanced DC voltage detecting circuit Unbalanced DC voltage detecting circuit

1978-07-19

1980-01-15

Moose, Jr.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

330207P, H02H 320

Patent

active

041841875

ABSTRACT:
An unbalanced DC voltage detecting circuit which includes first and second switching transistors with one connected to the output terminal of a power amplifier through a low pass filter and the other connected to the output terminal through a DC level shifting device and the low pass filter with the outputs of the first and second transistors connected to a third switching transistor which controls current to a relay such that when said third transistor is turned off, the relay is deenergized to open a circuit to a load. The first and second transistors are controlled by unbalanced DC voltage which exceeds predetermined levels.
A second embodiment includes temperature control to prevent overheating.

REFERENCES:
patent: 3691427 (1972-09-01), Honda et al.
patent: 3965295 (1976-06-01), Evans et al.
patent: 4034268 (1977-07-01), Klauck

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