HMT/Zig-Zag

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.

Applications

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