Which type of winding is used in 3 phase shell-type transformer?
Correct answer: B. Sandwich type
- A. Circular type
- B. Sandwich type
- C. Cylindrical type
- D. Rectangular type
Explanation
Shell-type three-phase transformers commonly use interleaved sandwich windings, in which sections of high- and low-voltage windings are arranged alternately. This improves magnetic coupling and reduces leakage reactance.
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