3 phase transformer equivalent circuit

hello,
when we are using single phase transformer ,when we are designing equivalent circuit of transformer ,we will transfer all secondary to primary /primary to secondary, tht time resistance, reactanc ewill change to r2'=r2/k2,

similarly when we are using 3 phase transformers to design equivalent circuit of tht, for star-star coneectiion, when secondary star resistanec, inductaance transfered to primary star how the effect on resistance and inductance, pls can u give equivalent circuit for tht........................