THE CORPORATION

Power Quality international, inc. is a full service company, providing power system solutions to its many consulting, utility, industrial, governmental, institutional, commercial and manufacturing clients. The mitigation of load-generated power system harmonics is a specialty.

PQI clients and customers benefits from over thirty-five years of engineering and technical ‘hands-on’ field experience. With the exception of the Antarctica, we have completed major international assignments on every continent.

With its technical and manufacturing ‘know how’, PQI was first to develop and commercialize a number of leading-edge technologies and products. These devices, some of which are listed here, provide cost-effective solutions to various power system problems.

2003 -  First to use the e-Rated Transformer Engineering ProgramÔ that allows our engineers to convert a transformer’s linear losses and efficiencies into non-linear losses and efficiencies that are based on any harmonic current profile.

2003 -  First to use the e-Rated Transformer Corporation VCD 1-2003 Guide for Determining Energy Efficiency for Distribution Transformers under Non-Linear Load Conditions, which has the same efficiencies requirements as NEMA PT 1-2002.

2003 -  First to use the e-Rated Transformer Corporation VCD 2-2003 Test Method for Measuring the Energy Consumption of Distribution Transformers under Non-Linear Load Conditions, which is based on a Voltage & Current Differential Method.

2003 -   First to use the e-Rated Transformer Corporation VCD 2-2003 Voltage & Current Differential Method Measuring Instrument, which limits the measurement error to +/-0.04%, when measuring the efficiency of a transformer under any non-linear ambient and/or load condition.

2003 -  First to develop a Technology Demonstration Vehicle that demonstrates (i) all harmonic related ‘power quality’ issues, and (ii) compares the accuracy of the Power In – Power Out Measurement Method and the e-Rated Transformer Corporation VCD 2-2003 Voltage & Current Differential Measurement Method.

2001 -   First complete line of Harmonic Filtering Transformers that exceed EPA – Energy Star^Ò linear load efficiency requirements under 100% Total Harmonic Distortion of Current load conditions.
 

PQI HarMitigatorÔ products, which include harmonic mitigating power, distribution and drive isolation transformers, are approximately 2% more efficient than any competing harmonic mitigating transformers and up to 15% more efficient than typical conventional or K-Rated transformers. 

2001 -  First computed program that will calculate a solution for harmonic current, ‘penalty’ loss and power cost reductions, and system performance and power quality improvement. 

The PQI SolutionÔ program provides a Statement of Design Objectives, a comprehensive System Study, a Mitigation Proposal and a Performance Guarantee.
  

2000 -  First electromagnetic Zero Sequence Harmonic Filter that shunts zero sequence harmonic currents at the load-end of a branch circuit.

Mini-ZÔ filters provide an alternative to de-rating conventional distribution transformers, applying K-Rated distribution transformers, increasing ‘shared’ neutral conductors or configuring branch circuits with separate neutral conductors, in an environment that is rich with zero sequence harmonic currents.

1996 -  First commercial sale of medium voltage class sub-cycle Static Voltage Regulator Transformers for application in a utility’s distribution system.

PQI TransRegulatorÔ products mitigate the voltage sags that result from fault clearing events on a utility’s transmission or distribution systems.

1995 -   First commercial sale of medium voltage class, sub-cycle Static Transfer Switches for application in a utility’s distribution system.

PQI TransSwitchÔ products provide uninterruptible premium power to a utility customer’s entire facility.

1991 -   First complete line of Harmonic Filters and Harmonic Filtering Transformers that shunt or cancel zero sequence harmonic currents and/or cancel positive and negative sequence harmonic currents.

            PQI HarMitigatorÔ products, which include harmonic filtering power, distribution and drive isolation transformers, reactors and filters, provide the means for The PQI SolutionÔ.

1986 -  First electromagnetic Zero Sequence Harmonic Filters that shunt zero sequence harmonic currents from a three-phase, four-wire sub-system.

            I₀FilterÔ products provide an alternative to de-rating conventional distribution transformers, applying K-Rated distribution transformers or increasing feeder circuits’ neutral conductors, in an environment that is rich with zero sequence harmonic currents.

1982 -  First Partial Discharge Analyzers that monitor the condition of stator insulation systems in ‘on-line’ hydroelectric generators. 

            PDA-H^â technology remains the ‘world standard’ for failure avoidance and maintenance optimization.