Reference bus Primary Secondary 7. A 3-phase transformer having zero sequence impedance of Zo,has the zero sequence network as shown in above fig.the connections of its windings are Star-Star...

Extracted text: Reference bus Primary Secondary 7. A 3-phase transformer having zero sequence impedance of Zo,has the zero sequence network as shown in above fig.the connections of its windings are Star-Star Delta-Delta delta-star with neutral grounded star-delta