AHF Active Harmonic Filter

The most advanced active harmonic filter on the market today utilising a three level inverter to provide rapid harmonic current correction. Available in 25, 35, 50, 60, 75, 100, 150 amps in both wall mount and cabinet mount modules, 400/480/690VAC three phase.

Compact High Performance

  • Wall mount or cabinet mount in an ultra-compact design
  • Modular design permits 600A within a single cabinet
  • Can be incorporated into electrical switchboards

Optimal Harmonic Mitigation

  • THDi <5%
  • Selection of odd and even harmonics up to the 50th order
  • Intelligent FFT for automatic correction of all 50 harmonic orders, plus manual selection of individual harmonic orders
  • High efficiency >97%
  • Reaction time <100us Response time of <10ms
  • FFT, Intelligent FFT and Instantaneous Reactive control methods

3-Level Inverter Design

  • Utilises 12 IGBTs and zero point clamping providing five switching level stages
  • Reduced switching losses and permits higher switching speeds
  • Lower harmonic content in the waveform provides high precision compensation
  • Smaller and lighter filtering components
  • Outstanding modularity, compact and very light weight

Protect Your System From Resonance

  • The current spectrum is analysed at 1024 individual points per cycle
  • System impedance at each individual harmonic is effectively ‘learnt’ by the AHF
  • Compensation current is slowly increased with system stability closely monitored
  • Should resonance be detected at any point the intelligent FFT can skip the problematic point

Balance Your Loads and Correct Your Power Factor Too

  • In addition to harmonic mitigation the AHF can provide load current balancing
  • Reactive power can be compensated for thus increasing power factor

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