What is the best way to deal with a non-sinusoidal load?

Using a transformer with a High K-rating or a Harmonic Mitigating Transformer (HMT) is the best approach for dealing with non-sinusoidal loads. Non-sinusoidal loads, such as those created by electronic devices and variable speed drives, can produce harmonic distortions that affect the power quality in an electrical system. These harmonics can lead to overheating, reduce the efficiency of equipment, and create other power quality issues.

Transformers with a High K-rating are designed to handle these harmonic currents more effectively than standard transformers. They have lower impedance at harmonic frequencies, allowing them to better manage the flow of harmonic currents, which reduces losses and allows for more efficient operation. Harmonic Mitigating Transformers specifically incorporate design features to reduce and mitigate harmonic distortion in the power supplied.

In contrast, using a standard transformer may not adequately address these issues, as they are typically optimized for linear loads and may not handle the complexities introduced by non-sinusoidal loads effectively. A variac, or variable transformer, would not be a suitable solution as it does not address the issues of harmonics. Lastly, a direct connection without a transformer could lead to significant problems in a system with non-sinusoidal loads, as it does not provide any isolation