Which K-factor rating is suitable for a transformer when 100% of the load is electronic equipment?

The K-factor rating for transformers helps in determining how well they can handle harmonic distortion generated by non-linear loads, such as electronic equipment. Non-linear loads can cause excessive heating in transformers due to the harmonics they introduce into the electrical system.

In this context, K-factor ratings reflect the ability of a transformer to handle such loads without compromising its performance or lifespan. For 100% electronic equipment loads, where devices generate significant harmonics, selecting a transformer with a higher K-factor is crucial.

A K-factor of 20 is rated to efficiently manage the increased harmonics from such loads, providing more capacity to dissipate heat generated by these harmonics. This helps in avoiding overheating and prolongs the transformer’s life.

Lower K-factor ratings, while suitable for less demanding loads, may not effectively handle the harmonic contributions from fully electronic systems, leading to overheating, inefficiency, and potential transformer failure if applied in such scenarios.