Which operational hazard increases when harmonic currents flow within three-phase power transformers due to non-linear loads?

💡 Explanation

When harmonic currents circulate in the transformer, increased eddy current losses occur because the oscillating magnetic fields induce circulating currents in the core and windings, resulting in I²R heating. Therefore, eddy current losses are more likely, rather than reduction in coupling, changes in dielectric strength or hysteresis saturation effects dominated by fundamental frequency flux.

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