5000+
active harmonic filter modules installed
Merus® A2
Active Harmonic Filter
A scalable, versatile, and durable active harmonic filtering solution designed and manufactured in Finland using innovative Merus® Technology.
Active harmonic filter from 50 to 800A
Merus® A2
cabinet solution
Merus® A2
module solution
THDi <5%
after filtering
(IEEE-519 compliant)
40+
countries with active partner presense
Merus® A2 Active Harmonic Filter is a proven product. It eliminates harmful harmonics to keep your power clean, systems efficient, and operations running.
Key features
Smart system design
- Easily scalable with modular design
- Modern user experience with no cryptic codes
- Parallel structure where each unit operates as master or slave
- Reliable plant operation and longer equipment lifetime
Proven value for your operations
- Proven reliability with 5000 deliveries over 10+ years
- High customer satisfaction with NPS 46
- Full service backed by decades of power quality expertise
- Flexible delivery with cabinet or module installation
Verified performance
- Compliance with key standards (IEEE-519, G5/4, EN 50160, and others)
- Fast response time under one network cycle, harmonics mode under 100 µs
- No over or under compensation
- Support for both open and closed loop CT configurations
Technical information
Is Merus® A2 the right solution for me?
Industry
Semiconductor, pulp & paper,
pharmaceuticals, food & beverages, automotive, metal processing
Commercial buildings
Data centers, hospitals,
airports, logistic centers,
shopping malls
Infrastructure and utilities
Water treatment, wastewater purification, irrigation systems, desalination
Anyone with VFDs
Wherever VFDs are used, our active filter helps optimize performance and power quality
Request for Quotation for Merus® A2
What does Merus® A2 do?
Active harmonic
filtering
Merus® A2 detects harmonic distortions caused by non-linear loads and cancels them in real time. It ensures compliance with the harmonic limits defined in IEEE 519, G5/4, EN 50160, and other power-quality standards.
The system can be installed to mitigate harmonics from a single large load or multiple loads.
Dynamic reactive power compensation
Merus® A2 provides dynamic reactive power compensation for power factor correction, voltage variation, and flicker mitigation. This improves electrical efficiency and saves money.
Load current
balancing
Phase-to-phase-connected equipment can burden only two of the three lines, creating voltage unbalance between the phases.
Merus® A2 offers dynamic load balancing that distributes the load more evenly across all three phases, preventing overloading of the electrical system.
How does Merus® A2 work?
Merus® A2 operate similarly to noise-canceling headphones.
They measure the distorted current of the non-linear load and inject harmonic frequencies, but with an opposite phase angle. Canceling out harmonic currents reduces voltage harmonics and eliminates distortion at the point of common coupling.
They are connected in parallel with the loads to be compensated and measure the distorted current of the non-linear load then inject harmonic frequencies, but with an opposite phase angle. Canceling out harmonic currents reduces voltage harmonics and eliminates distortion at the point of common coupling. Only the fundamental frequency current component is left to be supplied from the power system.
Module or cabinet solution?
Merus® A2 MODULE
- Small installation footprint
- Standard: IP20 – Upgradable up to IP30
- Possibility for partner/retailer to add value by cabinet integration
- Easier logistics, local sourcing
- Includes: Merus® A2 modules and Merus® HMI
Merus® A2 CABINET
- Hides busbars, fuses, wiring
- Standard: IP21 – Upgradable up to IP54
- Keeps unwanted objects outside
- Touch protection
- Includes: Merus® A2 modules, HMI integrated into electrical cabinets
- The customer only needs to take care of the CTs that measure the current from the network or load side (depending on configuration)
Where can I buy Merus® A2?
Contact our partner network
Find your local partner and get support close to your installation.
Contact us
Talk to our experts to define your power quality needs and find the right solution.
Specify your solution
Calculate the harmonic levels in your system and define the required filtering.
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Anything on your mind? Let’s talk!
Riku Kalliomaa
Head of Sales, Active Harmonic Filter
Global
Mikko Pohjola
Sales Manager, Active Harmonic Filter,
Key Accounts & OEMs
Viktoria Mansikkala
Sales Manager, Active Harmonic Filter
Partners, Europe
Pauli Halonen
Sales Manager, Active Harmonic Filter
Finland
Juhani Jaatinen
Senior Sales Manager,
DACH, Benelux, France, APAC
Venkatesh Ramachandra
Regional Sales Manager,
Middle East
