A single-phase three-winding transformer has the following parameters: $Z_{1}=Z_{2}=$ $Z_{3}=0+j 0.06, \mathrm{G}_{c}=0$, and $\mathrm{B}_{m}=0.2$ per unit. Three identical transformers, as described, are connected with their primaries in $\mathrm{Y}$ (solidly grounded neutral) and with their secondaries and tertiaries in $\Delta$. Draw the per-unit sequence networks of this transformer bank.

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The Answer of A single-phase three-winding transformer has the following parameters: $Z_{1}=Z_{2}=$ $Z_{3}=0+j 0.06, \mathrm{G}_{c}=0$, and $\mathrm{B}_{m}=0.2$ per unit. Three identical transformers, as described, are connected with their primaries in $\mathrm{Y}$ (solidly grounded neutral) and with their secondaries and tertiaries in $\Delta$. Draw the per-unit sequence networks of this transformer bank.

A Single-Phase Three-Winding Transformer Has the Following Parameters Z1=Z2=Z_{1}=Z_{2}=Z1​=Z2​= Z3=0+j0.06,Gc=0Z_{3}=0+j 0.06, \mathrm{G}_{c}=0Z3​=0+j0.06,Gc​=0

A Single-Phase Three-Winding Transformer Has the Following Parameters $Z_{1}=Z_{2}=$ $Z_{3}=0+j 0.06, \mathrm{G}_{c}=0$