VLT® Low Harmonic Drive

The first solution to combine an active filter and a drive in one package

The VLT® LHD continuously regulates harmonic suppression according to the load and grid conditions without affecting the connected motor. The total harmonic current distortion is reduced to less then 3% on grids with balanced mains, a minimum pre-distortion to less than 5% on grids with high harmonic distortion and 2% phase unbalance. The VLT® Low Harmonic Drive meets all present harmonic standards and recommendations.

Power Range

160-710 kW
250-1000 HP

Voltage range

380 – 480 VAC 50 – 60 Hz

Enclosure degree

IP 21/NEMA 1
IP 54/NEMA 12


  • RFI filters
  • Disconnect
  • Fuses
  • Mains shielding
  • Feedback and I/O options
  • Fieldbus options
  • dV/dt filters
  • Sine wave filters

Features and benefits

Unique features such as sleep mode and back channel cooling offers unmatched energy efficiency for Low Harmonic Drives

The VLT® Low harmonic drive requires the same set-up and installation as a standard VLT® drive and out of the box it ensures optimum harmonic performance

The VLT® Low harmonic drive has the same modular build-up as our standard high power drives and shares similar features: Built-in RFI filters, coated PCB and user-friendly programming