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← TechnologyWhich outcome occurs when a three-phase transformer operates with undetected, excessive harmonic currents?
A)Increased transformer core saturation✓
B)Reduced winding insulation breakdown
C)Improved transformer cooling efficiency
D)Decreased transformer audible noise level
💡 Explanation
When excessive harmonic currents circulate, increased magnetic flux density appears because these harmonics distort the magnetic field, driving select sections of the core to saturation. Therefore, core saturation results, rather than breakdown, as dielectric stress is independent; harmonics reduce transformer winding life and increase losses than cooling effectiveness.
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