Total Harmonic Distortion assessment vs class rule / IEC 61000 limits - typical 5 % voltage / 8 % current on marine distribution.
Formula
$$ THD_V \leq 5%, \quad THD_I \leq 8% $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $THD_V$ | Voltage total harmonic distortion | % | power quality meter |
| $THD_I$ | Current total harmonic distortion | % | power quality meter |
Sources
- IEC 61000-3-4 / Class rules.