Reducing operating costs of a food & beverage plant by filtering harmonic distortions

Challenges in the customer’s food factory

The customer’s plant was experiencing frequent electronic card failures, and cables and transformers were heating up excessively, along with nuisance tripping. These were among the problems reported by the plant manager. Merus Power’s local partner in Tunisia, Capcondo, was approached to identify the source of these issues and to propose a reliable solution.

It was identified that most of these challenges were caused by harmonic distortions, with large AC-fed compressors as the main source. A following power quality audit showed that the Total Current & Voltage Harmonic Distortions (THD%) were reaching up to 31% & 9.4%. According to the global power quality standards and regulations, these values were exceeding the allowable limits of reliable and safe operation of electric equipment.

Our Merus® Solution

Based on the power quality report and keeping in mind the acceptable limits for the harmonic distortions for the end customer, the required harmonic compensation capacity was decided. As this was a manufacturing facility with mainly 3-phase loads, a 3-phase 3-wire Merus® Active Harmonic Filter was proposed.

Installation and commissioning were taken care of by Capcondo, Merus Power’s authorized partner in Tunisia. As the power quality report suggested, the main harmonics at the plant were low-order harmonics: 5th, 7th, 11th, and 13th, thus selectable harmonic filtering mode was chosen, and Merus® Active Harmonic Filter was configured to cancel the low-order harmonics.

Results after installation

According to the post-commissioning report, total current harmonic distortions were reduced from 31% down to the customer’s desired limit, which was under 8%. Similarly, total voltage harmonic distortions were also brought down from 9.4% to around 4%, ensuring compliance with global standards and regulations.

The power factor at the plant was also improved from 0.92 to 0.99. The improved sinusoidal waveform and overall quality helped to extend the lifetime of the electrical and electronic equipment and restored their reliable operation.

Segment / Application

Food & Beverage industry – large compressors fed by AC drives



Power quality issue

  • High current harmonic distortion
  • High voltage harmonic distortion

Merus® Solution

Customer Benefits

  • Reduced maintenance costs
  • Reduced downtime
  • Energy savings
  • Higher productivity
  • Longer lifetime of plant and equipment
  • Compliance with harmonic distortion standards and regulations

Do you have any questions?

Please contact one of our salespeople with questions and inquiries.

Markus Ovaskainen


+358 40 539 2145

Riku Kalliomaa

Head of Sales,
Regions & Channels

+358 50 3323 020

Jaakko Poutamo

Sales Manager,
Energy Storage, Europe

+358 50 918 0012

Mikko Zavertkin

Sales Manager,
Key Accounts & OEMs

+358 40 5908 858

Viktoria Mansikkala

Sales Manager,
Baltics & Eastern and Southern Europe

+358 44 9 735 737

Juhani Jaatinen

Senior Sales Manager,
DACH, Benelux, France

+49 160 762 4909 (DE)

Pedro Esteban


+65 9155 4225

Venkatesh Ramachandra

Regional Sales Manager,
Middle East

+971 50 55 38 465
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