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Mirus, a specialized division of Federal Pacific, designs passive harmonic filters to mitigate current distortion at the source of non-linear loads. The Lineator family of harmonic filters addresses a wide range of applications, from standard variable speed drive (VFD) installations to systems requiring advanced performance, environmental durability, or enhanced system stability.
These series-connected filters ensure compliance with IEEE 519 standards while maintaining the highest levels of system efficiency and reliability without the use of complex power electronics.
Passive harmonic filters provide a robust, cost-effective solution for protecting upstream electrical infrastructure from the damaging effects of harmonic distortion.
The Lineator series is specified for critical systems where efficiency and long-term reliability are essential for managing non-linear loads.
Data centers and critical power environments with strict harmonic requirements.
Water and wastewater pumping systems and treatment facilities.
Oil and gas, as well as heavy industrial environments requiring rugged solutions.
Commercial and institutional HVAC systems, including chillers and cooling towers.
Marine and offshore environments with VFD-driven propulsion and auxiliary systems.
Healthcare facilities where stable, clean power is essential to sensitive medical equipment and building systems.
The Lineator Advanced Universal Harmonic Filter is designed for 6-pulse VFD applications requiring less than 8% THID performance. With over 100,000 units in service worldwide, the AUHF delivers proven reliability and IEEE 519 compliance.
The Lineator High Performance is an advanced model engineered to achieve less than 5% THID, matching the harmonic performance of active front-end (AFE) drives.
The Lineator HP2 is a passive harmonic filter purpose-built for EC fan applications, addressing the low DC bus capacitance challenges that cause instability with standard passive filters.
The Lineator Extreme Duty is specifically designed for harsh environments with high background voltage distortion up to 12% or high ambient temperatures.
The Lineator Single-Phase Universal Harmonic Filter is designed to mitigate harmonic distortion from single-phase non-linear loads, improving power quality at the panel or equipment level.
Characteristic
Lineator™ AUHF
Lineator™ HP
Lineator™ HP2
Lineator™ ED
Voltage Class
208 V–690 V
208 V–600 V
208 V–690 V
208 V–690 V
Input Current Distortion (THID)
< 8% at full load
< 5% at full load
< 8% at full load
< 8% at full load
Efficiency
> 99.0%
> 99.0%
> 99.0%
> 99.0%
Power Factor
> 0.95 (30% to 100% load)
> 0.98 (at rated load)
> 0.95 (at rated load)
> 0.95 (at rated load)
*The Lineator ED maintains the same harmonic mitigation performance as the AUHF while providing enhanced environmental durability. Performance may vary depending on system conditions.
Additional solutions, including the Inversine AUSF (Advanced Universal Sine-wave Filter), are available for unit-level, single-phase, and waveform conditioning applications.
Determining the appropriate harmonic mitigation strategy depends on load variability, efficiency requirements, and the total harmonic distortion limits of your facility. The following table provides a direct comparison between Mirus’s passive and active filtration solutions.
Feature
Passive Harmonic Filter
Active Harmonic Filter
Mitigation Method
Series inductor/capacitor network
Parallel IGBT current injection
Operating Efficiency
> 99%
96%–97.5% (low-voltage)
Harmonic Spectrum
Full wide-spectrum mitigation
Up to 50th harmonic order
High-Frequency Noise
None (No supraharmonics)
Injects switching noise (> 50th)
Maintenance
Minimal (No fans or filters)
Periodic fan and filter service
Response Time
Instantaneous (Passive)
Real-time (< 1ms sensing)
Access technical specifications, installation manuals, and white papers relevant to harmonic filtration.
Filter By Product
Mirus supports harmonic filtration with technical consultation and simulation tools to ensure optimal system performance and compliance.
Complimentary software to predict harmonic performance and energy savings for any specific drive load.
Download SOLV™
Direct-to-engineering access for non-standard voltages, kVA ratings, and specialized enclosure designs.
Technical analysis to identify harmonic issues and optimize filter selection for facility-wide compliance.
Explore Power Quality Assessment
Mirus engineers passive harmonic filters with a commitment to energy efficiency and real-world performance. Unlike conventional filters that can fail under voltage imbalance or background distortion, the Lineator is engineered to maintain its mitigation effectiveness in non-ideal grid conditions.
Our passive design eliminates the failure modes associated with power electronics, providing a lower total cost of ownership and a service life that typically matches the life of the connected equipment.
Contact our team to identify the appropriate passive filter configuration for your harmonic mitigation and operational requirements.