How water plant operators can easily meet IEEE 519 harmonic limits without overspending on Variable Frequency Drives

When it comes to meeting IEEE 519 specifications for limiting current total harmonic distortion to less than 5%, bigger is not better once the VFD solution has met that threshold. The fact is, both 18-pulse and 24-pulse VFD inputs provide harmonic performance well below the IEEE standard.
But while moving from an 18-pulse to a 24-pulse only improves the current total harmonic distortion by 0.84%, it also increases capital costs by 16% and boosts operating costs significantly over the life of the VFD.
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