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MCQ Practice Question
Measurements & InstrumentationInstrument Transformers

The secondary of an energized current transformer should generally not be?

  • AOpen-circuited
  • BConnected to its rated burden
  • CShorted through an ammeter of low impedance
  • DGrounded at one designated point where required
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Correct Answer: A. Open-circuited
Explanation: Opening an energized CT secondary can produce dangerously high secondary voltage and excessive core flux.
Reference: Standard measurements and instrumentation: instrument transformers
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