Eatons HCU2 active harmonic filters are engineered to provide dynamic harmonic correction by actively injecting the required currents into an electrical distribution system to cancel the entire spectrum of harmonic currents at the point of connection. Unlike passive filters, Eatons HCU2 can provide effective harmonic correction for varying load conditions and harmonic spectrums by providing dynamic correction up to their rated capacity. Can be sized to meet specific levels of harmonic correction, providing compliance with IEEE 519 recommended levels The HCU2 also has the secondary benefit of providing power factor correction with any excess capacity after correcting all harmonic conditions.