A single$-$phase transformer is rated $100$ kVA, $2400-240$ V$.$ The impedances and shunt admittance of the transformer are Z$1=0\mathrm{.}65+$j$0\mathrm{.}95($high$-$voltage winding impedance$)$ Z$2=0\mathrm{.}0052+$j$0\mathrm{.}0078($low$-$voltage winding impedance$)$ Ym$=2\mathrm{.}56$x$10^-4-$j$11\mathrm{.}37$x$10^-4$S $($referred to the high$-$voltage winding$)$