The Most Trusted Name in Power Factor Correction and Harmonic Filtering


NEPSI strongly believes that a well-informed customer is our best customer. We provide the following educational information with the hopes that it helps you better understand your power factor needs... and how NEPSI products and services can satisfy these needs. We encourage you to use these tools as needed and call us with any additional questions you have.

Technical Notes

An informative and exhaustive list of technical notes regarding the theory, creation, and implementation of capacitor banks and harmonic filter banks. Articles contain scientific explanations for the benefits of power factor correction and answer many of the questions you may have regarding the use of our products.

Spreadsheet Tools

In-depth spreadsheets containing formulas, diagrams, and other embedded tools to help in understanding your power factor / harmonic analysis.


Mathematical formulas and calculators for use in designing power factor correction systems and harmonic filter banks. These calculators are interactive, allowing you to input your own values and see the desired results.

Guide Form Specifications

Consulting engineers, architects, distributors, and other specifiers are welcomed to use the guide form specifications listed on our website. These free-to-use documents describe the specifications for numerous product lines.

Product Literature

Our product literature provides a more visually engaging introduction to the products we offer. These documents are extremely printer-friendly, serving as a great hard-copy alternative to this website. We encourage you to print these documents out as you wish and use them as quick-reference guides to our products


An assortment of instructional videos to help educate our customers about our products. These helpful videos cover a variety of installation, replacement, and maintenance procedures.

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