Which outcome occurs when a three-phase power transformer's differential protection circuit breaker misoperates during an inrush current event?

💡 Explanation

When the differential protection misoperates, a false tripping occurs because the inrush current is misinterpreted as an internal fault, disrupting the power supply. Therefore, false tripping and system instability result, rather than overheating, voltage sag, or harmonic resonance, which stem from different transformer issues.

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