Today, nearly every piece of electrical equipment generates harmonics (undimmed filament bulbs and uncontrolled heaters are two rare exceptions). This Application Note gives a comprehensive and up-to-date overview of harmonics and explains why harmonic problems have been increasing over recent years. It presents an overview of the problems harmonic currents can create and the available solutions. It concludes that good design practice, the right electrical equipment and good maintenance are the keys to preventing future problems.
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