Mitigating harmonics with the Allen Bradley PowerFlex 755T Drive with Active Front End

In recent times, there has been a considerable increase in harmonic distortions attributed to the use of power electronics, non-linear commercial and industrial loads and Variable Speed Drives (VSDs). These deviations can influence the optimal performance of your connected devices.

The potential negative impacts of harmonic distortions on electrical systems include, but are not limited to:

  • component overheating
  • increase in supply transformer heat levels
  • random breaker tripping
  • shortened motor life
  • decreased device productivity
  • increased losses and reduced power factor can lead to increased energy cost.

Rockwell Automation has an array of solutions to fit your specific needs. The PowerFlex 755T Drive with Active Front End actively tracks and regulates input current to maintain sine wave current draw. This technique generates minimal voltage distortion, allowing the input power converter to meet IEEE 519 at the input terminals of the drive.

This method is cost effective on single drive applications typically greater than 55kW or on large common bus systems with many drives. Selecting a regenerative active front end drive allows for additional benefits for applications that traditionally require dynamic brake resistors.

You can read more about Harmonics in these links:

Harmonics Part 1: An introduction into Harmonics
Harmonics Part 2: Harmonics and Power Factor
Harmonic Solutions for VSDs

To find out the best harmonic mitigation solution to suit your operation, please contact your local NHP Drive Technology Expert or email us:

Australia - 1300 NHP NHP
New Zealand - 0800 NHP NHP

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