Which risk increases if transformer oil capacitance decreases?

A)Winding insulation electric field stress✓

B)Core lamination eddy current losses

C)Tank wall mechanical fatigue cracking

D)Cooling fin thermal runaway conduction

💡 Explanation

Decreased oil capacitance implies reduced permittivity, therefore electric fields preferentially concentrate in the solid winding insulation via capacitive reactance reduction, because higher stress accelerates dielectric breakdown there rather than elsewhere.

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Which risk increases if transformer oil capacitance decreases?

💡 Explanation

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