N atural air coo ling is generally restricted for transformers up to__________?
Correct answer: A. 1.5 MVA
- A. 1.5 MVA
- B. 5 MVA
- C. 15 MVA
- D. 50 MVA
Explanation
Natural-air cooling, or AN cooling, is generally used for relatively small transformers and is commonly limited to about 1.5 MVA. Larger ratings require oil circulation or forced cooling to remove heat effectively.
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