Current-measuring arrangement with overload protection

Details Current-measuring arrangement with overload protection Current-measuring arrangement with overload protection

1981-02-17

1987-10-13

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Meter protection or fraud combatting

307200A, 338 22R, G01R 136

Patent

active

047001305

ABSTRACT:
A current measuring arrangement including a measuring resistor can be protected against excess currents by means of a PTC-resistor and an amplifier circuit. This protection is self-restoring in contrast to the conventional series-connected safety fuse. The amplifier circuit, the PTC-resistor and the measuring resistor may be arranged so that the property of zero voltage drop of a known circuit arrangement is maintained.

REFERENCES:
Smith, C. G.; "Application of Positive . . . "; Electronic Equipment News; vol. 12; No. 12; Mar. 1971; pp. 42-49.

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