Calculate approximate overall dimensions for a 200KVA, 6600/440 V, 50HZ, 3 phase core type transformer, The following data may be assumed; emf per turn= 10V;Maximum flux density =$1.3Wb/m^2$, Current density=$2.5 A/m^2$; window space factor=0.3, overall height= overall width; stacking factor=0.9 Use 3 stepped core.