Equivalent circuit parameters of the current transformer with toroidal core in conditions of distorted signals transformation

The subject of the article are the issues regarding the changes of the equivalent and magnetic circuits parameters of the current transformer with toroidal core (made from permalloy NiFe 80) during the transformation of distorted signals. Working mechanism of the windings system and magnetic circuit of transformers in these conditions are being changed as well as their metrological properties. The essence of the problem is that the hysteresis loops of the current transformer core for distorted currents have different shapes than for sinusoidal waveforms. In addition, during the transformation of distorted primary currents there is an increase of active power losses in the transformer core and windings.