Distribution transformers are generally designed for maximum efficiency around________________?
Correct answer: D. 50% load
- A. 90% load
- B. zero load
- C. 25% load
- D. 50% load
Explanation
Distribution transformers remain energized continuously and are designed with core loss in mind, so their maximum efficiency is commonly placed near half-load rather than near full-load. At this point, variable copper loss is approximately balanced with constant core loss.
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