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The peculiarities of agricultural power supply are reduced reliability of power supply, increased voltages, and a three-phase – single-phase power distribution system and reduced quality of voltage at power receivers. A key element in rural electrical networks is the power transformer. To detect the deformation of the windings of the power transformer of rural electrical networks, accurate measurements of the currents in the neutral of this transformer are required. Current transformers installed in the neutral do not provide sufficient accuracy at currents less than 5 % of the nominal. A method is proposed for reducing the current transformer errors when operating at low currents, considering the nonlinearity of the magnetization characteristics of the core. The results of calculating the compensation of errors of a laboratory sample of a current transformer are presented.

Reduction of current transformers errors of rural electrical networks when operating at low currents