What do K-rated transformers do in relation to harmonic currents?

K-rated transformers are specifically designed to handle the non-linear loads that cause harmonic distortion in electrical systems. They are constructed with features that allow them to tolerate the heating effects that arise from these harmonic currents, which are often generated by devices such as computers, LED lighting, and adjustable speed drives.

The correct answer is that K-rated transformers do not reduce harmonic currents. Instead, they are utilized in applications where harmonic currents are present to ensure that the transformer can manage the additional heat and stress caused by these harmonics without compromising the performance and reliability of the transformer.

K-rated transformers can indeed prevent overheating or failure due to harmonic currents, but they do not eliminate or reduce the harmonic currents themselves; they simply provide robustness against their effects. In contrast, other options suggest functions that K-rated transformers do not perform, such as eliminating or enhancing harmonic currents, which does not align with their specific role in electrical systems.