Power Distribution
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Transformer Testing and Fault Finding
Power transformer failure results in production loss, unavailability of critical services, and loss of revenue. Routine testing and performing diagnostics can minimize loss and down time.By October 26, 2011
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Using Transformers in Electrical Engineering
Transformers are among the most common of electrical devices found in power plants, substations, electrical, and electronic equipment. Just about every electrical device makes use of transformers in one way or another. This guide will help you understand...By October 5, 2011
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What is Power Correction Factor for Transformers
Correction or improvement of the power factor of electrical equipment like transformers is done to reduce the required electric power and thereby save electricity. Here, we discuss how the power factor correction is done and also the calculation steps...By July 20, 2011
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Controlling AC Motor Speed Using VFDs Through Constant V/F Ratio
A resistive load can be simply controlled by varying the applied voltage. But controlling inductive loads like an AC motor definitely isn’t that simple and can be done only through VFDs. Here we comprehensively discuss the purpose of a VFD and how...By May 20, 2011
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Very Large Battery Systems for Utility-Level Power Storage
The need for large battery systems for renewable energy is becoming more evident lately. Vanadium redox batteries are considered to be good candidates for this purpose. Read this article to find out how they work and the current status of development...By April 30, 2011
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Three Phase with Two Transformers - the Open-Delta Connection
A transformer open-delta configuration is used to drive 3-phase loads where the power requirement is less and where the current load is small and may vary in the near future.By March 31, 2011
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New Process and Materials Offer Better Efficiency for Power Conversion
The process of converting AC to DC to run electronic devices involves inefficiency that is multiplied by the millions of devices that require them. What if this process could be made much more efficient? That's the promise that new materials used...By February 27, 2011
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Roles of Solar Power Regulators, Inverters, and Converters
Understanding the roles of power regulators, inverters, and converters is important for completing a solar power system in such a way that all components deliver optimal results. In this article, let's see how these components work and the features...By December 29, 2010
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Understanding Smith Charts
The Smith chart, also known as a polar impedance plot, was invented by Philip Smith in 1939 to plot the characteristics of microwave components such as reflection coefficient, impedance, and admittance. With the help of Smith chart, complex mathematical...By November 29, 2010
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Nonlinear Loads on the Electric Power System Causing Problems for Local Utilities
Large industries and electrical utilities are very concerned about the presence of nonlinear loads in their electrical power systems. This article describes the causes of harmonics and their effects, as well as the means to improve power quality and to...By October 6, 2010