TransformersQuestion 1048 of 1506

A Y-Y transformer bank is connected. What does this allow?

  1. Operation on DC supplies
  2. A neutral wire on each side of the bank
  3. Operation with one winding missing
  4. Zero losses in the core
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Correct answer: A neutral wire on each side of the bank

Both Y centre points are available for neutral connections.

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

Practice transformers

Questions last reviewed: 18 October 2026