TransformersQuestion 1045 of 1506

What is the advantage of a special three-phase transformer over a bank of three single-phase units?

Higher fault tolerance on every winding
It needs no connections
Less material, size and weight
It works on DC

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Correct answer: Less material, size and weight

A shared core saves iron and space.

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

Questions last reviewed: 18 October 2026

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