Active Harmonic Filters :

For applications where numerous low-voltage drives are running on the same supply bus, an Active Harmonic Filter (AHF) may be the best power quality solution. NELCO's AHF isolates harmonic current and protects equipment from damage due to harmonic distortion. By actively monitoring the non-linear current demanded by the load, the AHF electronically generates an adaptive current waveform, which matches the shape of the non-linear portion of the load current. By injecting this matching current in the bus, the AHF stops the destructive current at the point of connection. And by correcting power factor, the AHF can result in lower operating and utility costs. With no series components, the AHF is easy to install, can be paralleled for applications with greater capacity and are sized to guarantee IEEE 519-1992 compliance