Discussion
A potential or voltage transformer differs from a power transformer in being designed for
Answer: D
Correct answer: accuracy of ratio and phase angle at a small burden
A voltage transformer exists to reproduce a measurement, not to deliver power, so it is designed so that the ratio and phase relationship it presents to the meter or relay are accurate over its specified burden. Its rating is a few tens of volt-amperes, and unlike a current transformer it must never be short circuited.
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