Which outcome occurs when rapid closing of a high-voltage circuit breaker causes a surge impedance mismatch?

💡 Explanation

When a high-voltage circuit breaker closes rapidly, a surge impedance mismatch occurs because of the sudden change in electrical impedance leading to traveling waves reflecting and interfering with each other. Therefore, transmission line voltage oscillations will result, rather than saturation, relay malfunction, or breakdown which require specific conditions around transformer design and frequency shifts.

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