BENEFITS OF ACTIVE FILTERS

Improve all aspects of your installation’s network quality

Harmonic Filtering

Eliminate harmonics up to the 50th order and improve your network quality

Manually select the ones you want to filter to optimise their power, or use the time mode to adapt the filtering current in real time to variations in your installation.

Reactive Compensation

Avoid penalties due to reactive energy

Adapt your installation to avoid any reactive power penalties, whether inductive or capacitive. Program the desired cos phi from 0.7L to 0.7C and forget about penalties on your bills.

Phase Balancing

Reduce the neutral current and ensure the efficiency of your installation

Reducing the neutral current prevents overheating, insulation loss, and nuisance tripping, improving the performance of your loads and ensuring continuity of service.

Flicker Reduction

Mitigate flicker in your installation

Compensate for current variations caused by fluctuating loads in real time, stabilises and reduces voltage drops, and mitigates the flicker, improving the quality of your installation.

Harmonic Current Decomposition
Harmonic Graph
Active filter current compensation AFQm / AFQs
CUTTING-EDGE TECHNOLOGY

Proprietary design with 3-level topology

Circutor's AFQm active filters incorporate a multilevel topology (3-level topology NPC) which offers superior performance compared to traditional two-level architectures. This technology allows for more precise compensation, greater energy efficiency, and less thermal stress for all the system's electronic components.

More sinusoidal wave

The PWM output, in the three-level technology, improves harmonic filtering, obtaining a more sinusoidal wave shape, improving the performance of the installation, reducing high-frequency harmonics, and improving power quality.

Greater energy efficiency

Reduced losses and heat generation, optimising consumption and increasing the system's lifespan.

Better adaptation to variable loads

Fast and effective response to changes in load conditions, maintaining stable performance.

MAXIMUM ROBUSTNESS

Active filters with proven reliability

Uninterrupted functionality

Circutor's active filters are designed to maintain the filtering function 100% of the time. The device is always active, adjusting the filtering power according to the installation conditions.

Anti-resonance system

Active filters incorporate intelligent algorithms that detect resonance at different filtering frequencies, automatically stopping the injection at the affected frequencies and resuming it as soon as the resonance phenomenon disappears.

Ensuring its useful life

The internal components of our active filters are designed to ensure a useful life of 15 years..

Smart thermal management

Adjusts the fan speed according to the filtering demand and regulates the device's power under extreme temperature conditions, thus protecting its useful life..

CHOOSE YOUR ACTIVE FILTER

Expandable filtering power according to your installation

Start with the active filter that best suits your current consumption and expand its capacity with ease. Circutor’s range of active filters allows for the addition of extra modules or the connection of up to 100 devices in parallel, ensuring continuous and scalable protection against harmonics generated by non-linear loads.

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AFQm

Active multifunction filter with IGBT technology

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AFQs

Active multifunction filter with silicon carbide technology

ADAPTED TO YOUR INSTALLATION

Modular, compact and easy-to-install design

The AFQm range of active filters has been specifically designed for installations with limited space, offering a modular and scalable solution to adapt to future harmonic filtering needs.

Available in floor- (cabinet) or wall-mounted versions, the new AFQs models allow direct integration into variable frequency drive or motor control panels, without the need for climate control rooms or additional space.

Standard version,
IP41 protection rating

+

Reinforced version,
IP54 protection rating

Top or bottom cable entry

Built-in circuit breaker

Special model for altitudes up to 5,000 m

CUTTING-EDGE TECHNOLOGY

First European manufacturer to use SiC technology

Circutor is the first European manufacturer to apply SiC (Silicon Carbide) technology in the new AFQs range.

El Silicon carbide is a compound of silicon and carbon that stands out for its exceptional properties as a semiconductor. It is capable of withstanding high voltage gradients and electric fields.

High thermal conductivity

It allows for more efficient heat dissipation, which is crucial for the performance of active filters.

Resistance to corrosion

The active filters are more robust and durable thanks to SiC's corrosion resistance.

Low thermal expansion

SiC maintains its shape and size even under extreme conditions, ensuring greater durability and reliability.

High filtering efficiency

With a filtering efficiency of 99%, AFQsactive filters guarantee a higher quality.

HARMONIC CALCULATOR

Calculate which active filter your installation needs

Discover our harmonic calculator, an online tool that allows you to easily size the most
suitable active filter for your electrical installation. 

Don’t have the measurements? No problem: You can model your installation based on the connected loads and obtain a theoretical calculation adjusted for your projects.

Harmonics_Calculator
CURRENT REGULATIONS

Designed to comply with the IEEE 519 standard

Circutor’s active filters are designed to ensure compliance with the harmonic distortion limits established by theIEEE 519standard and other international electrical codes. Thanks to the touchscreen,IEEE 519filtering mode can be activated with a single tap, automatically applying the required filtering levels, without the need for manual programming.

Its dynamic adaptation and real-time response capacity ensure that power quality remains within the required margins, offering a robust and scalable solution for environments where energy reliability is critical.

 

See the IEEE 519 standard
ADDED VALUE

European product with added value

Circutor’s AFQ active filters are designed and manufactured in Spain, offering advanced features that provide high added value throughout their use cycle: from simple installation to intelligent operation and interaction, both local and remote, with the device.

Open or closed loop operation with only 3 current transformers

The device is designed to operate in open or closed loop configurations (network side or load side) using only 3 current transformers.. This solution reduces costs, simplifies installation, and maintains high filtering accuracy without sacrificing performance.

Real-time filtering

Activate temporary filtering mode for an immediate response(20 µs)based on the behaviour of the loads in your installation. Our equipment allows you to filter selected harmonics and track the entire spectrum in real time, precisely reducing harmonics.

Local and remote access with integrated web server

Access the device locally via its Ethernet port or remotely from any browser through the integrated web server. Configure parameters, monitor the system in real time, and download alarms along with waveforms to perform a detailed and accurate analysis of the installation.

Direct measurement in medium voltage

The AFQm active filter allows measurements to be taken at medium voltage when installed with a suitable step-up transformer. This allows for the compensation of harmonics and imbalances without the need to intervene on the low voltage side, ideal for industrial installations and substations.

Internal memory for long-term analysis

Thanks to the integrateddatalogger, the device records all the electrical parameters of your installation every minute for a period of up to 7 years. The information is stored in the internal memory and can be easily downloaded for analysis, report generation, or energy audits.

SUCCESSFUL STORIES

Most characteristic installations

2024 Olympic Games - International Broadcasting Centre

Paris - France

9x AFQm-3WF

Filtering of a total of 3 power transformers with a high generation of harmonics.

2700 A solution in cabinets.

Riyadh Air Metropolitan

Madrid - Spain

5x AFQm-4WF

Harmonic filtering in LED lighting and reduction of neutral current by phase balancing.

500 A wall-mounted solution.

Glass factory

Waikato Region - New Zealand

6x AFQm-3WF

Providing high-quality power, ensuring the minimisation of harmonics and avoiding factory downtime for the customer.

1800 A solution in cabinets.

King Abdulaziz International Airport

Jeddah - Saudi Arabia

170x AFQm-3WF

System improvement with harmonic reduction and power factor correction.

24 kA and 27 MVAr solution in cabinets.

Phosphate Plant - Fosfoquim

Talcahuano - Chile

5x AFQm-3WF

Flickercorrection due to reactive power consumption and reduction of high harmonic distortion.

1800 A solution in cabinets.

Cement Plant - Cementos El Molino

Teruel - Spain

1x AFQm-3WF

Reduction of harmonic distortion and prevention of reactive power penalties.

300 A solution in cabinets.

THE THEORY OF HARMONICS

Want to learn more about harmonics?

Our harmonics expert has the explanation.

What are harmonics?

What effects do harmonics produce?

What solutions can mitigate harmonics?