What are the typical impedance values of 400/220 kV transformers, 0.69/33 kV wind step-up transformers and 0.4/33 kV solar PV step-up transformers?

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Tony Maine

Strictly speaking the impedance of a transformer should be large (measured as a parallel circuit) compared with the impedance of its loads. If it isn't then you don't have much of a transformer. But I don't think it's possible to give actual figures without knowing the kVA ratings as well. I suggest you contact the manufacturers for such devices.

Mohamed EL-Shimy

Dear Tony Maine,

Could you please elaborate your previous answer, especially the issue associated with the impedance of a transformer and its relation with the supplied load impedance?