Eaton DT-3 Energy-Efficient Harmonic Mitigating Transformer

The electrical transformer has been a staple of electrical power systems for the past 100+ years. While the types of electrical loads that are being added to our systems today have radically changed, the transformer has stayed relatively the same in design during this time frame.

Eaton’s harmonic mitigating transformer (HMT) represents the evolution of the transformer into something that will best provide clean, energyefficient electricity to power the loads of today and tomorrow. The recent shift of our electrical loads from predominately AC consumers (resistive heating elements, incandescent lighting, three-phase motor load) to DC consumers (such as computers, fax machines, printers, down to the “wall-wart” that recharges the cell phone) requires that our electrical infrastructure changes as well. These new loads now introduce other currents and frequencies into our electrical power systems—commonly known as “harmonics.” Harmonic currents can cause additional heating, which may cause transformers, generators and conductors to become overloaded. Excessive heat is one of the major reasons that standard transformers and conductors fail prematurely.

These harmonic currents have various other effects (such as “loss of ride-through capability,” reduced lifespan and mysterious misoperation of equipment) on the components and loads of an electrical distribution system.

Eaton’s HMTs, when used properly within an electrical system, will help keep the loads operating the way the manufacturer designed them and keep the facility’s electrical system free from voltage distortion.