Calculation of parameters of an equivalent circuit of transformers with a split winding of a lower voltage

A two-winding three-phase transformer with split winding of the lower voltage (LV) by two independent branches can be used in separate or parallel work of the branches. In splitting of the LV winding by the two parts, a two-winding transformer may be considered as a three-winding one with the windings U (upper), V1 and V2. The equivalent circuit is the three-ray star. The calculation expressions are suggested for determining element parameters of an equivalent circuit of three-phase two-winding power transformers with the LV winding split in two parts.