Electrical continuity load monitoring circuit

Details Electrical continuity load monitoring circuit Electrical continuity load monitoring circuit

1987-03-02

1989-01-17

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324133, 324537, 324555, 324556, 340652, G08B 2100, G01R 3102

Patent

active

047990198

ABSTRACT:
A load monitoring, indicating, and alarm system monitors electrical continuity through an AC electrical load coupled in a first electrical line with an electrical indicator such as an indicating lamp in a second electrical line coupled in parallel with the first electrical line. A first AC electronic switch such as a triac is coupled in series with the indicator in the second electrical line. The actuating gate of the first AC electronic switch is coupled to the first electrical line. The first AC electronic switch is therefore conducting and the indicator lamp on when there is electrical continuity through the load and power is being supplied to the load. A reactance control component is coupled in series with the load for adjusting the phase angle of gate current to voltage delivered to the gate terminal of the first AC electronic switch. The reactive component may be a second AC electronic switch coupled in series with the electrical load in the first electrical line. A resistor operatively couples the gate terminal of the second AC electronic switch to the second electrical line. A normally closed relay and alarm may be coupled in a third electrical line placed in parallel with the first and second electrical lines for providing an audible alarm or other alarm signal when power is being supplied to the load and there is failure of electrical continuity through the load.

REFERENCES:
patent: 3863150 (1975-01-01), Cebuliak et al.
patent: 4353025 (1982-10-01), Dobkin
patent: 4520417 (1985-05-01), Frank

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