Self-powered ammeter

Details Self-powered ammeter Self-powered ammeter

1981-04-24

1983-12-20

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rectifier

324127, G01R 1922, G01R 120

Patent

active

044220391

ABSTRACT:
A self-powered ammeter is disclosed. A metering circuit receives an a-c current to be tested and then generates a d-c voltage whose magnitude is proportional thereto. A display circuit receives the d-c metered voltage and provides a visual indication of the magnitude of the measured current. The current to be measured also drives a current transformer which, in turn, has an output burden circuit which produces a regulated power supply for the metering and display circuit components.

REFERENCES:
patent: 2724821 (1955-11-01), Schweitzer, Jr.

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