Harmonic Mitigation

The HMT (Harmonic Mitigating Transformer) is a three phase transformer with 0° or -30° displacement between the primary and the secondary.

An HMT is used to reduce current harmonics on the primary side of a transformer and voltage distortion on
the secondary. A single HMT reduces the flow of triplen harmonics, 3rd, 9th, 15th, 21st, etc into the transformer primary. Used together on the same power line a 0° and -30° HMT will also reduce the 5th and 7th harmonics.

These transformers are designed to reduce voltage distortion when powering non-linear loads.


For use in environments with non-linear loads such as computers, printers and communication equipment
where stable load and operation is necessary

  • Medical facilities including hospitals
  • Data centers
  • Office buildings
  • Schools



Built in accordance with NEMA, ANSI, UL and CSA standards

UL and CSA Listed

Options and Accessories

Consult factory for more information

  • 50 Hz
  • Other sizes, voltages and temperature rises available
  • Copper windings
  • K-4 and K-20
  • Dual electrostatic shields
  • 115ºC, 80ºC temperature rise