200/400V Active Harmonic Filter AHF Module

Enjoypowers’ 200/400V Active Harmonic Filter(active power filter) AHF Module is a flexible and modular power quality product for harmonic mitigation, power factor correction and three-phase balance.

Rated capacity: 30A/50A/75A/100A/150A/200A
Rated input: 200/400Vac
Power grid frequency: 50/60Hz ± 10%
Filter Range: 2nd to 50th order
Mounting type: Wall-mounted, Rack-mounted, Floor-mounted
Power grid structure: 3P3W, 3P4W
Price: Affordable and negotiable
Warranty: Standard 1 year, Negotiable
Hybrid var compensation: Support

200/400V Active Harmonic Filter AHF ModuleOverview

Enjoypowers’ 200/400V active harmonic filter(active power filter) AHF module is a three-level inverter power management system used for power harmonics filtering, power factor correction, three-phase load balancing, effectively reducing line loss, and prolonging the service life of power equipment.

Enjoypowers’ 200/400V active harmonic filter AHF’s modular design allows flexibility in installation and integration. It is a preferred power quality solution for all power consumers, system integrators, and OEMs.

Operating principle

Enjoypowers’ AHF is connected in parallel with the nonlinear load and uses a set of current transformers (CT) to detect the load current. It calculates each order harmonic current through the FFT algorithm in its DSP chip, and then generates a compensation current with the same amplitude but opposite phase angle to the detected harmonic current, so as to offset the original load harmonic.


  • High energy efficiency, due to three-level inverter technology
  • Integration of load balancing, power factor compensation, and harmonics filtering features into one module
  • Hybrid var compensation solution: built-in 16 DO ports to control ordinary capacitors, or RS485 interface to control intelligent capacitor
  • Precise compensation, high-speed response, Overall response time <7.8ms
  • Load balancing and unloading of neutral wires.
  • Flexibility and modularity


  • All types of industrial installations
  • Equipment using variable speed drive (VSD) and frequency converter
  • arcing equipment: electric arc furnace (EAF), ladle furnace (LF), and arc welding machine
  • Switching power supply: computer, TV, photocopiers, printer, air conditioner, PLC
  • UPS system
  • Datacenter
  • Medical equipment: MRI scanner, CT scanner, X-ray machine, and linear accelerator
  • Lighting equipment: LED, fluorescent lamp, mercury vapor lamp, sodium vapor lamp, and an ultraviolet lamp
  • Solar inverter and wind turbine generators


Enjoypowers AHF Specification

Enjoypowers Active Harmonic Filter User manual V2.4

Enjoypowers AHF TUV Certification


This series of videos introduces the working principle of AHF, how to wire and connect CT, how to set up HMI, how to communicate with AHF, etc.

Related Reading

  1. Understanding IEEE 519 Harmonic Standard: A Comprehensive Guide
  2. Demystifying THDi vs. TDD: Key Differences and Their Significance in Power Quality Analysis
  3. Difference Between Active and Passive Harmonic Filter: Comprehensive Comparison
  4. Python demonstrates the working principle of an Active Harmonic Filter (AHF)
  5. Comparative Analysis of Three-Level and Two-Level Active Harmonic Filter
  6. Calculating the Appropriate Size of an Active Harmonic Filter (AHF)
  7. Selecting the Right CT for Active Harmonic Filter (AHF)
  8. Comprehensive Guide to Active harmonic filter(AHF) Calculation and Installation

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