FIELD: electricity.
SUBSTANCE: invention relates to the field of electric engineering, in particular, to the quality control of electric energy in three-phase networks. In a three-phase four-wire network currents are measured by ammeters in each phase and neutral lead by means of single-phase current transformers as well as the total current of two phases is measured; according to measurement results of five currents symmetrical components are determined for positive-, negative- and zero-sequence currents as per formulae.
EFFECT: simplified method for measurement current and voltage symmetrical components in the three-phase networks as well as an increased accuracy of measurement.
2 dwg
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