Passive Harmonic Filters

Passive Harmonic Filters


Neptune India Ltd offers Passive Harmonic Filters. Most of the mentioned filtering techniques have common drawback of higher cost compared to Passive Filtering techniques. Consequently, the harmonic filtering techniques to a large extent are still the most commonly used techniques for current harmonics mitigation of 6-pulse front-end diode rectifier application. They have developed an efficient Passive Filter, which can suit many such similar loads. Since all filter components are passive they are rugged, maintenance free, reliable and low cost. Moreover, the filter implementation procedure is relatively easy. With simple structure, Passive Filters have been extensively used for VFD harmonic mitigation. No involvement of electronic circuits, hardware and complicated control algorithms. Hence, Passive Harmonic Filters are relatively inexpensive means for eliminating current harmonics distortion and improving the system power factor. Because of these two in one improvement our broad band filters usually have edge over the other effective filtering methods.

  • Uses fewer capacitors while maintaining 98% efficiency.
  • More consistent power factor across the load range.
  • Improves C/L ratio, which decreases potential resonance.
  • Lowers capacitance resulting in less voltage rise at no load, at PCC (Point of Common Coupling) and on the DC Bus.

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