The polarity of transformer windings can be determined by connecting them as a(n) ____ and testing them for additive or subtractive polarity.
A) isolation transformer
B) control transformer
C) distribution transformer
D) autotransformer

Question

Quizplus · Accepted Answer

The autotransformer is commonly used for polarity testing of transformer windings. By connecting the windings in series with the autotransformer, the resulting voltage can be used to determine the additive or subtractive polarity of the transformer windings.

The Polarity of Transformer Windings Can Be Determined by Connecting