Operating at 99% efficiency, ECOsine® Passive Filters are installed at 3-phase voltage of 480 Vac ±10%, at 60 Hz, ±1 Hz. Units come in 2 models: FN3412 with <5% THDi and FN3418 with 7-10% THDi. Offering capacities of 50 and 100 A (air cooled), or 200, 250, 300 A (water cooled), ECOsine® Active Filters operate at 480 Vac ±10%. Additionally, 200 A, 600/690 Vac active filter is also available. Digital technology monitors and dynamically corrects harmonics up to 50th order in less than 300 µs.