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HG7 Harmonic Filters, when applied at the drive, provide a low impedance path for the major harmonic currents demanded by the drive.
This greatly reduces the amount of harmonic current flowing through the distribution system and results in improved power factor, lower RMS currents, lower harmonic current distortion, lower harmonic voltage distortion, and increased system capacity.
Prime candidates for filtering are installations of variable frequency drives or adjustable speed devices in facilities where those drives represent a significant portion of the load, or when specifications call for limited harmonics (like IEEE 519, 1992). Filtering would also benefit any application that utilizes sensitive electronic equipment that may be susceptible to harmonic distortion, such as capacitors, control devices, motors, etc. Some industrial examples include printing presses, extruders, machining and pulp and paper. Commercial applications include waste water treatment, pumping and cooling, and HVAC.
HG7 Drive-Applied Harmonic Filters have been proven to be the most effective harmonic distortion mitigation technique available for drives.