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← TechnologyWhich consequence results when circulating currents induce hotspots in power transformer windings?
A)Accelerated insulation thermal degradation✓
B)Reduced hysteresis core magnetization
C)Increased dielectric resonant frequency
D)Enhanced conductive heat dissipation
💡 Explanation
Accelerated insulation degradation occurs due to *eddy current* heating within the transformer winding conductors. Because the induced circulating currents produce localized hotspots, the insulation's thermal breakdown accelerates; therefore, the lifespan is reduced, rather than improving heat conduction.
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