Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________?
Correct answer: D. for 110 kV and above
- A. upto 20 kV
- B. upto 50 kV
- C. upto 80 kV
- D. for 110 kV and above
Explanation
Multi-layer helical windings are used for high-voltage transformer windings at very high voltage ratings, commonly 110 kV and above. Their series-connected turns and discs help withstand the high electrical stress.
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