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← TechnologyWhich outcome occurs when a single-phase load is disconnected on an unloaded three-phase transformer bank?
A)Increased core saturation and overcurrent
B)Harmonic distortion and voltage imbalance✓
C)Reduced transformer core losses overall
D)Balanced sinusoidal current in remaining phases
💡 Explanation
When a single-phase load is disconnected from an unloaded three-phase bank, voltage imbalance increases through mutual coupling, which generates harmonic currents because asymmetric magnetic flux distribution.Therefore voltage imbalance results, rather than other outcomes, requiring specific conditions like load demands or core properties.
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