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GATE Electrical 2026 | Question: 28

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Three single-phase $11 \mathrm{kV} / 3.3 \mathrm{kV}$ transformers are connected to form a three-phase transformer bank with connections as shown.

Considering $\mathbf{A B C}$ phase sequence, the vector group of the transformer is:

  1. Dd$0$
  2. Dd$4$
  3. Dd$6$
  4. Dd$10$

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