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 Power Quality Information Resources
 pdf - University of Illinois - What is Reactive Power
From the Department of Electrical and Computer Engineering, University of Illinois: What is Reactive Power? It explains the relationship between inductors and capacitors, how they transfer reactive power, and how it saves energy.
pdf - Washington State University
From Washington State University: Reducing Power Factor Cost - It explains what power factor is, what are the causes of low power factor, and how to improve it.
pdf - PDH Course on Power Factor
From PDHonline.com, a continuing education course for engineers: Power Factor in Electrical Energy Management. It is an excellent description of Power Factor.
pdf - Demand Charges Explained
One power company's explanation of how they calculate demand charges. It is important to remember that power companies vary in their method of calulating demand charges; so for an accurate understanding of your specific demand charges, you should contact your power company.
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