Harmonic Distortion - THD vs Rule Limit

Total Harmonic Distortion assessment vs class rule / IEC 61000 limits - typical 5 % voltage / 8 % current on marine distribution.

HarmonicTHDIEC 61000

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

THD_V \leq 5\%, \quad THD_I \leq 8\%

Symbol	Meaning	Unit
$THD_V$	Voltage total harmonic distortion	%
$THD_I$	Current total harmonic distortion	%

Source: IEC 61000-3-4 / Class rules

Total Harmonic Distortion assessment vs class rule / IEC 61000 limits - typical 5 % voltage / 8 % current on marine distribution.