FIELD: electric measurements in ac circuits. SUBSTANCE: transducer has ferromagnetic core, primary winding and negative-feedback secondary winding, and amplifier; ferromagnetic core has gap accommodating Hall- effect sensor whose input terminals are connected to DC supply, one output terminal, to amplifier input, and other output terminal, to neutral bus. EFFECT: improved precision of non-sinusoidal current conversion at slight dependence of gain on frequency. 1 dwg
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