Harmonic detection and filtering - Schneider Electric

6.2.4 Selection criteriab passive filters offer both:v power factor correctionv large capacity for current filtering.Installations where passive filters are installed must be sufficiently stable, i.e. a lowlevel of load fluctuations.If a high level of reactive power is supplied, it is advised to de-energise the passivefilter when load levels are low.Preliminary studies for a filter must take into account any capacitor banks and maylead to their elimination.b active harmonic conditioners compensate harmonics over a wide range offrequencies. They can adapt to any load, however, their conditioning capacity islimitedb hybrid filters combine the strong points of both passive filters and active harmonicconditioners.35