The secondary of a current transformer is always short-circuited under operating conditions because it____________________?
Correct answer: A. avoids core saturation and high voltage induction
- A. avoids core saturation and high voltage induction
- B. is safe to human beings
- C. protects the primary circuit
- D. none of the above
Explanation
An open-circuited CT secondary can develop dangerously high voltage and drive the core into saturation. Keeping it short-circuited prevents both effects, which is why a CT secondary must never be left open during primary current flow.
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