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A three phase transformer has a name plate details of 30 MVA and voltage rating of 230Y kV/69∆ kV with a leakage reactance of 10% and the transformer connection via wye-delta. Taking a base of 230 kV on the high voltage side, the transformer reactance on the LV side is ___________

A three phase transformer has a name plate details of 30 MVA and voltage rating of 230Y kV/69∆ kV with a leakage reactance of 10% and the transformer connection via wye-delta. Taking a base of 230 kV on the high voltage side, the transformer reactance on the LV side is ___________ Correct Answer 176.33 Ω

Zb(HV) = kVb(HV))2/MVAb Zb(HV) = 2302/30=1763.33 Ω XΩ =0.1*1763.33 = 176.33 Ω.

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