Most people don't realize that harmonics have been around a long time. Since the first AC generator went online more than 100 years ago, electrical systems have experienced harmonics. The harmonics at that time were minor and had no detrimental effects.

Harmonic analyzers are effective instruments for determining the waveshapes of voltage and current and measuring the respective frequency spectrum. Several types of harmonic measuring instruments are available, with each type having a different capability.

This article explains the fundamentals of harmonic distortion including total harmonic distortion (THD) and describes how to minimize it to protect equipment.

This article offers a general overview of how harmonics occur and how they can effect crucial equipment as well as how to effectively analyze harmonics.

This general overview of harmonics discusses the definition of harmonics, how they work, problems with harmonics, circuit overloading and triplen harmonics.

This article discusses two different bandpass filter structures that were evaluated for achieving good harmonic suppression at microwave frequencies.

An article on that covers the Sources of Harmonics, Electronics Demand Clean Power, Common Solutions to Attenuate Noise, The Transformer as a Filter and How NBT Work.

This article covers harmonic studies performed to determine harmonic distortion levels and filtering requirements within a facility.

This article intends to provide an overview on harmonic filters and hopefully answer some of the questions that you might have on them.

This article explains harmonics, standards and how to overcome harmonics problems.

This article examines why harmonics are an issue, and explores some of the options available for harmonic control.