Magnetizing in rush current in transformer is rich in
- A. 3rd Harmonics
- B. 7th Harmonics
- C. 2nd Harmonics
- D. 5th Harmonics
Answer: C. 2nd Harmonics
Explanation: Magnetizing inrush current is heavily asymmetric and rich in second harmonic components, which is utilized by differential protection relays for harmonic restraint.