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Drive Impedance and Passive Filters Drive Impedance and Passive Filters

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Date: September 19, 2018
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. Download
Passive Harmonic Filter Selection Guidelines Passive Harmonic Filter Selection Guidelines

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Date: August 13, 2018
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! Download
Line and Load Reactor Basics Line and Load Reactor Basics

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Date: February 26, 2018
Line and load reactors can protect both motors and variable frequency drives (VFDs) from harmful current and voltage spikes and help reduce line distortions, known as harmonics. Read More! Download
Harmonic Filters: UL 508 vs UL 508A Harmonic Filters: UL 508 vs UL 508A

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Date: February 21, 2018
UL 508 covers industrial control devices and device accessories for starting, stopping, regulating, controlling, or protecting electric motors. Download
VFD DC Bus Voltage Degradation VFD DC Bus Voltage Degradation

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Date: December 14, 2017
Variable Frequency Drive DC Bus Voltage suffers degradation due to application of passive harmonic filters with high insertion loss. Download
Power Quality of UV Systems Power Quality of UV Systems

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Date: December 14, 2017
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. Download
Power Quality Tech Paper Power Quality Tech Paper

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Date: December 14, 2017
Drives and the Black Cloud of Power Quality paper describes the differences between harmonic filter options. Download
Reactance Tech Paper Reactance Tech Paper

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Date: December 14, 2017
Impact of additional AC Line Reactance on the DC Bus Voltage of a Motor Drive. Download
Motor Failures Tech Paper Motor Failures Tech Paper

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Date: December 14, 2017
Eliminating Motor Failures Due to IGBT-Based Drives when Connected with Long Leads. Download
High Voltage Distortion High Voltage Distortion

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Date: December 14, 2017
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. Download
Hybrid Tech Paper Hybrid Tech Paper

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Date: December 14, 2017
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. Download
IEEE 519 Tech Paper IEEE 519 Tech Paper

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Date: December 14, 2017
Meeting IEEE 519-1992 Harmonic Limits and Improving Power Factor using TCI Passive Harmonic Filters. Download
Carrier Suppression in Pumps Carrier Suppression in Pumps

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Date: December 14, 2017
Sinewave filters that highly attenuate carrier energy are required to protect leads and motors. Download
Changes to IEEE 519 Standard Changes to IEEE 519 Standard

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Date: December 14, 2017
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. Download
Common Mode Tech Paper Common Mode Tech Paper

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Date: December 14, 2017
V1k dv/dt output filters significantly reduce common mode current, increasing motor bearing life. Download
Generator Compatibility Passive Filters Generator Compatibility Passive Filters

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Date: December 14, 2017
All passive filters on the market today, regardless of kVAR, require capacitor disconnect contactors to be compatible with small generators at no load. Read More! Download
Harmonic Distortion in Data Centers Harmonic Distortion in Data Centers

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Date: December 14, 2017
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. Download
HarmonicGuard Notes HarmonicGuard Notes

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Date: December 14, 2017
The paper describes the effects of harmonic current and voltage distortion, as well as the source of poor power factor. Download