Which risk significantly increases in three-phase power distribution systems experiencing undetected single-line-to-ground faults?

💡 Explanation

When a single-line-to-ground fault occurs without prompt clearing, ferroresonance phenomena arise because the system's inductance interacts with the capacitance of healthy lines, causing overvoltage on remaining phases. Therefore overvoltage results, rather than harmonic resonance, reduced power factor, or increased skin effect, which require different conditions.

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