[Sreelatha]

Please tell us the calculation of impedance for the transformer with windingd placed on different legs (not on the same leg). It is required for 500MVA, 765 kV Power Transformer design. …
Please tell us the calculation of impedance for the transformer with windingd placed on different legs (not on the same leg). It is required for 500MVA, 765 kV Power Transformer design. In this design tertiary winding of the transformer is placed on the return leg and we need to calculate impedance between the HV winding placed on the main leg and tertiary winding placed on the return leg.Kindly give me solution to calculate the same.

Thanks & Regards
Sreelatha

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[Hamid]

In Concentric geometry windings, there are many reasons for simplify the problem. For reactance (impedance) calculations, however, values can be estimated reasonably close to test values by considering only the window cross section. A high level of accuracy of 3-D calculations may not be necessary since the tolerance on reactance values is generally in the range of

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