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Sandwich Windings In Transformer

Figure 1.15 shows sandwich windings used in shell-type transformers. The high-voltage and low-voltage windings are split into a number of sections where each high-voltage section lies between two low-voltage sections. In sandwich coils, easily leakage can be controlled. Desired value of leakage reactance can be obtained by proper division of windings.
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Figure 1.15 Sandwich Windings
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