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Which risk increases when a power transformer operates with unbalanced phase currents?

A)Increased eddy current losses
B)Core material phase transition
C)Reduced dielectric strength
D)Compromised winding inductance

💡 Explanation

Increased eddy current losses occur because the unbalanced currents create uneven magnetic fields. This induces stronger circulating currents within the core via electromagnetic induction, which leads to localized heating; therefore, core saturation is more likely rather than phase change under this mechanism or inductance changes under different currents.

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