Which risk increases in a three-phase power distribution system when a load with significant harmonic currents is connected?

💡 Explanation

When harmonic currents are present in a three-phase system, increased eddy current losses occur in the transformer because these currents at higher frequencies induce circulating currents in the core material. Therefore, transformer overheating results, rather than line sag, generator instability, or breaker mis-operation, which depend on different power system faults.

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