Which outcome occurs a power transformer's protection circuit reacts to inrush current during energization?

💡 Explanation

When energizing a transformer, inrush current contains a significant DC component, which could saturate the core, and the protection uses current differential measurement, potentially falsely identifying this inrush as an internal fault, tripping the transformer. Therefore a spurious differential protection results rather than overvoltage, resonance, or saturation which require more sustained or specific failure dynamics.

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