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Which outcome occurs when impedance within a power transformer's protection circuit is excessively low?

A)Nuisance tripping of circuit breaker
B)Overvoltages due to Ferranti effect
C)Harmonic resonance amplification occurs
D)Transformer core saturation increases rapidly

💡 Explanation

Nuisance tripping occurs because a lowered impedance in the relay circuit creates an elevated fault current signal. Therefore, the circuit breaker incorrectly activates, rather than remaining stable under normal operating conditions with manageable inrush currents.

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