The secondary winding of which of the following transformers is always kept closed?
Correct answer: D. Current transformer
- A. Step-up transformer
- B. Step-down transformer
- C. Potential transformer
- D. Current transformer
Explanation
A current transformer operates with its secondary nearly short-circuited because an open secondary can produce dangerously high voltage. Therefore, its secondary is always kept closed through a burden or shorting link.
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