CAPS is your Source for PQI Harmonic Mitigating Transformers

We’re an authorized source for PQI Harmonic Mitigationg Transformers. Whether you are looking for energy efficiency ideas, experiencing equipment failures, or simply curious about power quality, CAPS is here to help with PQI.

Power Quality International is uniquely qualified to assist facility owners, managers, and engineering professionals with optimizing their power systems to improve efficiency and reduce power system related failures. We’ve been providing these engineered solutions for more than 40 years.


PQI has been on the leading edge of harmonic mitigation solutions longer than any other manufacturer in the industry. Our products are manufactured to the highest quality standards (ISO 9001), and our product designs have been proven highly effective in real-world scenarios. For these reasons, many engineers insist upon PQI for the most effective harmonic mitigation solutions.

All PQI Distribution TransFilters™ result in:

  • Reduced power costs
  • Reduced penalty losses due to harmonic currents
  • Reduced transformer heating and A/C loading
  • Reduced THDv to less than 5% at nonlinear loads or motor drives
  • Reduced losses in the loads, thereby reducing A/C requirements
  • Improved switch-mode power supply’s “ride-through” capability
  • Balanced primary phase currents
  • Assured system compatibility with sensitive electronic loads

Our Type DV Distribution TransFilters™ provide flexibility to engineer almost any solution; however, we also offer specialty harmonic mitigation transformers and filters designed to offer distinct advantages in certain applications.

Have a Question or Transformer Service?

Just fill out the form with your question and we’ll have someone get back to you right away. We monitor our email requests all day. If this is a request for emergency service you can expect a response within two hours if submitted between 8:00 am – 5:00 pm. It may be slightly longer if submitted between 5:00 pm and 9:00 pm. All requests submitted after 9:00 pm will be answered the following day.


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