What is Total Harmonic Distortion?

Definition

A measurement of the total harmonic content in a waveform expressed as a percentage of the fundamental frequency. THD levels indicate power quality and must be kept within limits defined by utility standards and equipment specifications.

Related Terms

Harmonic Distortion

Unwanted frequency components in an electrical system caused by non-linear loads...

Harmonics

Integer multiples of the fundamental power frequency caused by non-linear loads ...

Harmonic Filter

A passive or active filter designed to reduce specific harmonic frequencies gene...

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