Industry: Food & Beverage
Location: Thanh Hoa & Ho Chi Minh City
Installed equipment: Revcon RHF Active Harmonic Filter
CONTEXT AND CHALLENGES: HARMONICS THREATEN THE STABILITY OF F&B PRODUCTION LINES
In the food and beverage (F&B) industry, where production lines operate 24/7 and even a few minutes of downtime can result in losses of hundreds of millions of Vietnamese đồng (VND), power quality is a critical factor determining operational stability and safety.
One of Vietnam’s largest dairy conglomerates, with a network of plants across the country, faced a major challenge when preparing for a re-evaluation of its ISO 50001 energy management certification. Real-world measurements indicated that the levels of current harmonic distortion (THDi) and voltage harmonic distortion (THDv) in many areas exceeded the allowable limits specified by Circular 05/2025/BCT (Ministry of Industry and Trade). The primary sources of these excessive harmonics were variable frequency drives (VFDs), air compressors, filling lines, and highly automated processing systems.
This situation not only affected equipment lifespan and voltage stability, but also posed the risk of losing the ISO certification – which could disrupt production operations and increase maintenance costs.
A CUSTOM-TAILORED POWER QUALITY SOLUTION FOR EACH PRODUCTION LINE
Recognizing the importance of controlling harmonics in automated production lines, PowerMore worked closely with the plant’s technical team from the initial survey and measurement stage through to root-cause analysis and the design of a suitable solution for each load area.
Instead of applying a one-size-fits-all approach, PowerMore deployed an Active Harmonic Filter (AHF) system by the German brand Revcon using a multi-point architecture, custom-designed for the variable load characteristics of the F&B sector.
The solution was engineered in compliance with IEEE 519 and TT05/2025/BCT standards, with a total filtering capacity ranging from 55 A up to 750 A, distributed across the filling, processing, and air compression areas, as well as the main distribution panels.
Surveying and power quality measurements were conducted at the main electrical panels to ensure the final solution was optimally designed to suit the plant’s actual operating conditions.
PowerMore’s engineering team then fine-tuned the filter parameters at each installation point to ensure effective harmonic suppression without affecting production output. After the system went into operation, PowerMore continued to partner with the plants’ technical teams, providing ongoing support and regular maintenance to ensure the equipment operates reliably in the long term – reinforcing the commitment to “not just install, but operate together” with the client.
ACTUAL MEASUREMENT RESULTS: 96% REDUCTION IN CURRENT HARMONICS, SYSTEM MEETS DOMESTIC & INTERNATIONAL POWER QUALITY STANDARDS
Following installation and acceptance testing, independent measurement results showed a significant reduction in current harmonics (THDi) and voltage harmonics (THDv) across all areas. Harmonic levels were brought within compliance of both the Ministry of Industry and Trade’s TT05/2025/BCT regulation and the international IEEE 519 standard.
1. THANH HOA DAIRY PLANT: MANY LOADS CAUSING HIGH HARMONIC DISTORTION
The Revcon Active Harmonic Filter system deployed by PowerMore at multiple locations within the Thanh Hóa dairy plant has reduced THDi by over 90% and stabilized voltage across the entire system.
2. HCMC DAIRY PLANT 01: AIR COMPRESSORS CAUSING HIGH HARMONIC DISTORTION
PowerMore engineers conducted acceptance testing after successfully installing the harmonic filter and guided the plant’s technical team on how to monitor and operate the system via the on-screen interface.
3. HCMC DAIRY PLANT 02: HARMONIC LEVELS NOT COMPLIANT WITH TT05/2025/BCT STANDARD
PowerMore engineers inspected the operation of the 600A active harmonic filter system installed at four main distribution panels – a comprehensive solution for the Filling, Processing, and other critical areas of the plant.
4. BEVERAGE PLANT: HIGH HARMONIC DISTORTION IN AREAS WITH VARIABLE FREQUENCY DRIVES (VFDS)
BENEFITS AND VALUE DELIVERED
- Achieved ISO 50001 certification and fully met the criteria of the Ministry of Industry and Trade’s power quality regulations.
- 24/7 stable operation, with no further instances of VFDs tripping or sudden production line stoppages.
- Reduced energy losses, resulting in lower maintenance costs and extended equipment lifespan.
- Improved system reliability, a key factor for success in the F&B industry.
- Ongoing technical support and periodic maintenance provide peace of mind for long-term, sustainable operations.
“In the F&B industry, there is no room for power quality risks. Every percentage of harmonic reduction is another step toward sustainable operation and energy savings.”
– PowerMore expert
HARMONIC CONTROL - SMALL INVESTMENT, GREAT VALUE
The success of this project demonstrates that harmonic control is not just a technical requirement, but also a long-term investment strategy that helps enterprises ensure continuity, safety, and efficiency in their operations.
PowerMore is proud to have accompanied Vietnam’s F&B plants in the journey of enhancing power quality, aligning with national energy standards and advancing toward sustainable development.
Contact us for technical consultation and to schedule an on-site survey at your plant.