Electrical Engineering > GATE 2026 > Transformer Modeling
A three-phase two-winding transformer has a voltage transformation ratio VP/VS = 0.866 + j0.5, where VP is the primary side voltage in p.u., and VS is the secondary side voltage in p.u. IP and IS represent the currents injected into the primary and secondary sides of the transformer, respectively. The admittance corresponding to the leakage impedance of the transformer referred to the secondary is yt p.u. Neglect the magnetizing branch.
The Y bus representation of this transformer is:
Correct : c
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