Current-measuring device, especially for determining the motor c

Details Current-measuring device, especially for determining the motor c Current-measuring device, especially for determining the motor c

1988-03-21

1989-07-25

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

324103P, 324117R, 324130, G01R 120, G01R 102, G01R 1900

Patent

active

048517631

ABSTRACT:
Current-measuring device including a non-contacting current sensor and an evaluating device connected downstream to the sensor for producing an output signal proportional to a current being measured, comprising a circuit arrangement for determining a zero drift of at least one of the evaluating device and the current sensor from symmetrical components of the current being measured and for correcting the drift.

REFERENCES:
patent: 4138641 (1979-02-01), Karlin et al.
patent: 4305132 (1981-12-01), Tsuboshima et al.
patent: 4500837 (1985-02-01), Shuey et al.
patent: 4556842 (1985-12-01), Rosswurm

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