Which outcome occurs when a ground fault occurs in an ungrounded three-phase electrical system?

💡 Explanation

When a ground fault occurs in an ungrounded system, the fault current is limited, but the voltage on the remaining unfaulted phases increases to line-to-line voltage because the faulted phase potential is shifted to ground. Therefore voltage increases, rather than unbalanced line voltages or immediate tripping, which require grounded systems and specific fault current thresholds.

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