Red Seal Electrician Practice
TransformersQuestion 1052 of 1506

In a Y-connected transformer winding set, which ends are tied together to form the centre of the Y?

  1. One dot end and two non-dot ends
  2. Any two ends of any two windings
  3. All the dot ends or all the non-dot ends
  4. The ends are never tied together
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Correct answer: All the dot ends or all the non-dot ends

Mixing polarities gives an unbalanced bank.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.6: Three-phase Transformer Circuits

Practice transformers

Questions last reviewed: 18 October 2026