Physics · Electrical Protective Relays
Which of the following operating principles is used to construct a high-speed instantaneous type relay?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Shaded pole induction
- 2Thermal bi-metal strip
- 3Induction cup
- 4Permanent magnet moving coil✓
Correct answer
Permanent magnet moving coil
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