Part of the transformer which is most subject to damage from overheating is_____________?
Correct answer: C. winding insulation
- A. iron core
- B. copper winding
- C. winding insulation
- D. frame or case
- E. transformer tank
Explanation
Winding insulation is especially vulnerable because overheating accelerates its thermal ageing and can cause insulation breakdown. The copper winding may tolerate higher temperature than its surrounding insulation.
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