ELECTRONIC CURRENT TRANSFORMER Russian patent published in 2017 - IPC G01R19/00 

FIELD: electricity.

SUBSTANCE: preamplifier is designed in the form of the first and the second measuring amplifiers, the amplification control inputs of which are connected with the adjusting resistors. One of the second current transformer windings outputs is connected to the first inverting and second non-inverting measuring amplifiers inputs and through the serially connected the balance-unbalance transformer first winding and resistor matching with the output of the first measuring amplifier. The second current transformer windings output is connected to the first non-inverting and the second inverting measuring amplifiers inputs and through the serially connected the balance-unbalance transformer second winding and resistor matching with the output of the second measuring amplifier. The outputs of the measuring amplifiers are connected to corresponding differential inputs of the signal processing unit, paraphase outputs of which are the device outputs.

EFFECT: stability increase of the electronic current transformer operation under the influence of electromagnetic fields and other destabilizing factors, the improvement of its metrological characteristics.

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