Corona in transmission line usually happen when the electrostatic stress in air around the conductor exceeds

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Electrical Engineering MCQ on Power Transmission

Corona in transmission line usually happen when the electrostatic stress in air around the conductor exceeds

  1. 11 kV (RMS value)/cm
  2. 22 kV (maximum value)/cm
  3. 30 kV (maximum value)/cm
  4. 6.6 kV (RMS value)/cm

Correct answer: 3. 30 kV (maximum value)/cm

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