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April 2024 – Enerdoor’s New Active Harmonic Filter

Introducing Enerdoor’s latest active harmonic filter AHF; with excellent attenuation of current harmonic distortio

AHF Active Harmonic Filter



Enerdoor’s latest active harmonic filter is designed for automation and machine tools and can be rack or wall mounted. It works in parallel and compensates current for single or multiple load applications operating under varied loads.

Enerdoor’s active harmonic filter stands out by eliminating harmonic distortion induced by nonlinear loads and optimising power factor. The active harmonic filter is strategically connected to the mains to compensate for distorted harmonic currents.

With an unlimited amperage capacity reaching up to 400Vac, the active harmonic filter offers unparalleled flexibility and allows customization of voltage, current, connections and attenuation to meet any requirements to cater to diverse applications.

Active Harmonic Filters Features

  • Modular system
  • Module 50A, 100A, 150A
  • 2 mechanical dimensions
  • Distortion correction ability: <5% THD
  • Rack and wall mounting
  • Operation voltage: 400, 480 and 690Vac
  • Frequency: 50Hz and 60Hz
  • Harmonic order 2nd-50th
  • 3 level topology
  • Display/interface: LCD
  • Extension: up to 10 units in parallel
  • Three-phase plus neutral product with compensation on neutral 3 times than phase compensation


Typical Applications

  • Automation
  • Machine Tools
  • Water/Wastewater
  • Oil & Gas
  • VFDs and servo drives
  • Commercial buildings
  • End-user plants


Technical Information

AHF Active Harmonic Filter Voltage (Vac) Current (A) Inductance Height (mm) Inductance Width (mm) Inductance Depth (mm)
Rack Mounted 400Vac 150A 315mm 359mm 341mm
Wall Mounted 400Vac 150A 315mm 378mm 350mm


Enerdoor has over 25 years’ experience in EMC, power quality and CE certification. An international leader in power quality and electromagnetic solutions for automated machinery and industrial applications, Enerdoor’s large range of products can be customised to suit your project.


For further information on the new AHF active harmonic filter, please contact GD Rectifiers on 01444 243 452 or email

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