Drive Impedance and Passive Filters

While most variable frequency drives (VFD) use a built in DC choke or AC line reactor, some lower HP drives have no built-in impedance.  Passive filters are an effective solution to filter harmonic currents produced by 6-pulse VFDs and reduce source current total harmonic distortion (THD) to 5% or less.

Drive Impedance and Passive Filters

Effective Harmonic Mitigation with Active Filters

Industry standard three‐phase variable speed drives draw harmonic currents from the three phase voltage source. These harmonics can cause overheating and premature failure of power system equipment. An active filter is an effective way to filter the harmonic currents required by VFDs and eliminate the harmonic currents and voltages from the AC source.

Effective Harmonic Mitigation with Active Filters

Passive Harmonic Filter Selection Guidelines

Passive harmonic filters are an effective solution to filter harmonic currents. But choosing the correct filter for your application can be confusing. TCI can provide a wide range of filtering solutions and assist in choosing the right one. Find out more in our Tech Paper!

Passive Harmonic Filter Selection Guidelines

Product Solutions

The Product Solutions brochure contains product features, benefits, and descriptive waveforms for TCI products.

Product Solutions

Reactor Filter Size Chart

The Reactor Filter Size Chart is a cross reference table comparing the KDR line reactor to the KRF EMC filter, V1K dv/dt filter, and MotorShield sinewave filter, by rating and enclosure type.

Reactor Filter Size Chart

Reactor Manual

Reactor IOM Manual provides instruction on product installation, operation, and maintenance.

Reactor Manual

V1k Brochure

The V1k Brochure contains product benefits, descriptive waveforms, selection charts, and application guidelines.

V1k Brochure

V1k Brochure Spanish

The Spanish V1k Brochure contains product benefits, descriptive waveforms, selection charts, and application guidelines.

V1k Brochure Spanish

V1k Manual

V1K IOM Manual provides instruction on product installation, operation, and maintenance.

V1k Manual

Power Quality of UV Systems

Active filtering solutions are being more commonly applied in wastewater plants. The elimination of the base linear motor loads has also highlighted the power quality of the UV systems – high harmonic currents and a low, leading power factor. One solution is to integrate active filtering into these systems, so they are do not adversely affect the overall IEEE-519 compliance of the plant.

Power Quality of UV Systems

KMG Manual

KMG IOM Manual provides instruction on product installation, operation, and maintenance.

KMG Manual

KRF Manual

KRF IOM Manual provides instruction on product installation, operation, and maintenance.

KRF Manual

MotorGuard Brochure

The MotorGuard Brochure contains product benefits, descriptive waveforms, selection charts, and application guidelines.

MotorGuard Brochure

MotorShield Brochure

The MotorShield Brochure contains product benefits, descriptive waveforms, selection charts, and application guidelines.

MotorShield Brochure

High Voltage Distortion

High background voltage distortion can result in equipment malfunction and reduce the likelihood of meeting IEEE-519. Background distortion levels of 5% and higher are being seen at facilities from oil and gas pumping sites to industrial plants. It is critical to select the right harmonic mitigation approach under these harsh voltage conditions.

High Voltage Distortion

HSD Brochure

The HSD Brochure contains product benefits, descriptive charts, diagrams, and options.

HSD Brochure

HSD Manual

HSD IOM Manual provides instruction on product installation, operation, and maintenance.

HSD Manual

Hybrid Tech Paper

In many installations with high levels of harmonic currents, the most economical harmonic mitigation solution can be a properly sized combination of line reactors, active and passive filters.

Hybrid Tech Paper

KDR Brochure

The KDR Brochure contains product benefits, descriptive waveforms, selection charts, and termination options.

KDR Brochure

KDR Brochure S

The Spanish KDR Brochure contains product benefits, descriptive waveforms, selection charts, and termination options.

KDR Brochure S

HGL Manual

HGL IOM Manual provides instruction on product installation, operation, and maintenance.

HGL Manual

HGP Brochure

The HGP Brochure contains product benefits, descriptive waveforms, selection charts, and package options.

HGP Brochure

HGP Brochure Spanish

The Spanish HGP Brochure contains product benefits, descriptive waveforms, selection charts, and package options.

HGP Brochure Spanish

HGA Manual E EN

HGA IOM Manual (version E) provides instruction on product installation, operation, and maintenance.

HGA Manual E EN

HGA Manual F EN

HGA IOM Manual (version F) provides instruction on product installation, operation, and maintenance.

HGA Manual F EN

HGA Manual H EN

HGA IOM Manual (version H) provides instruction on product installation, operation, and maintenance.

HGA Manual H EN

HG7 Brochure Spanish

The Spanish HG7 Brochure contains product benefits, descriptive waveforms, selection charts, and package options.

HG7 Brochure Spanish

HG7 Manual

HG7 IOM Manual provides instruction on product installation, operation, and maintenance.

HG7 Manual

HGA Brochure

The HGA Brochure contains product benefits, descriptive waveforms, technical specifications, and schematic.

HGA Brochure

HGA Brochure Spanish

The Spanish HGA Brochure contains product benefits, descriptive waveforms, technical specifications, and schematic.

HGA Brochure Spanish

HGA Manual B EN

HGA IOM Manual (version B) provides instruction on product installation, operation, and maintenance.

HGA Manual B EN

Active Harmonic Filter Saves Money Case Study

Many oil producers are using multi-well pad drilling as an alternative to single well sites as a way to save money and reduce environmental impacts. Unfortunately, with more wells there is an increase in harmonics, and more spikes in voltage distortion. This is presenting a problem for many multi-well pad drilling sites.

Active Harmonic Filter Saves Money Case Study

Changes to IEEE 519 Standard

IEEE 519-2014 standard replaces the 1992 version. A number of key changes and differences exist between the two revisions, including clarification of how harmonic limits are applied at the point of common coupling, current THD limits at the PCC, and high frequency current allowance in low current distortion systems.

Changes to IEEE 519 Standard

Crescent Case Study

Case study on a large solar thermal energy project that required multiple active harmonic filters and line reactors to meet IEEE-519 and improve power quality.

Crescent Case Study

Harmonic Distortion in Data Centers

Power quality and power reliability are critical to data center operation. As strides have been made to improve energy efficiency and Power Utilization Effectiveness (PUE) it is important to ensure harmonics and power quality are not compromised as a result.

Harmonic Distortion in Data Centers

HarmonicGuard Notes

The paper describes the effects of harmonic current and voltage distortion, as well as the source of poor power factor.

HarmonicGuard Notes

HG7 Brochure

The HG7 Brochure contains product benefits, descriptive waveforms, selection charts, and package options.

HG7 Brochure

KRF Brochure

The KRF Brochure contains product benefits, descriptive waveforms, selection charts, and application guidelines.

KRF Brochure

KRF Brochure Spanish

The Spanish KRF Brochure contains product benefits, descriptive waveforms, selection charts, and application guidelines.

KRF Brochure Spanish