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← TechnologyWhich system degradation accelerates when transformer oil moisture exceeds limits?
A)Insulation paper degradation✓
B)Core lamination oxidation
C)Bushing porcelain cracking
D)Cooling fan motor failure
💡 Explanation
Accelerated insulation paper degradation occurs because increased moisture accelerates hydrolysis via the esterification reaction creating more free acids; this constitutes a runaway *depolymerization* process. Therefore, cellulose breaks down faster than under dry conditions; rather than primarily thermal stress.
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