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For large power transformers, self oil cooled type or air blast type which of the following values af current density may be used ? | |
A. | 1.0 to 1.2 A/mm2 [Wrong Answer] |
B. | 1.5 to 2.0 A/mm2 [Wrong Answer] |
C. | 2.2 to 3.2 A/mm2 [Correct Answer] |
D. | 3.2 to 4.2 A/mm2 [Wrong Answer] |