A three phase transformer has a nameplate rating of 30 MVA, 230Y/69Y – McqOptions

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1.	A three phase transformer has a nameplate rating of 30 MVA, 230Y/69Y kV with a leakage -reactance of 10% and the transformer connection is wye-wye. Choosing a base of 30MVA and 230 kV on high voltage side, the transformer reactance referred to the low voltage side will be _______(in ohms).
A.	15.87 Ω
B.	157.8 Ω
C.	176.33 Ω
D.	17.67 Ω
Answer» B. 157.8 Ω

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A three phase transformer has a nameplate rating of 30 MVA, 230Y/69Y kV with a leakage -reactance of 10% and the transformer connection is wye-wye. Choosing a base of 30MVA and 230 kV on high voltage side, the transformer reactance referred to the low voltage side will be _______(in ohms)?