When it comes to meeting IEEE 519 specifications for limiting total harmonic distortion to less than 5%, bigger is not always better. While 18-pulse variable frequency drives can provide total harmonic distortion levels of just 1.98% — less than half the 5% limit set by IEEE 519 — many water treatment operators are choosing more costly 24-pulse drives, wasting money and space.
Click below to learn more about 18-pulse vs. 24-pulse VFDs.