For the protection of transformer, harmonic restraint is used to guard against ____.

For the protection of transformer, harmonic restraint is used to guard against ____.

  1. a) Magnetizing inrush current
  2. b) Unbalanced operation
  3. c) Lightning
  4. d) Switching overvoltage

From the BPSC Assistant Programmer (CSE) September 2022 – Preliminary exam, question 19 of 90.

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