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← TechnologyWhich consequence results when exceeding the volt-ampere (VA) rating on power transformers in a cascading three-phase power grid systems?
A)Accelerated insulation breakdown occurs✓
B)Enhanced core magnetic saturation results
C)Dielectric oil viscosity increases
D)Increased eddy current generation appears
💡 Explanation
Exceeding the VA rating causes transformer overheating by the mechanism of increased current flow generating excess heat because exceeding current causes insulation breakdown under high thermal stress; therefore, insulation fails, and rather than other electro-magnetic effects.
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