Fundamental electrical engineering concepts and theory
This is the second post in a series of two on periodic electrical inspections. In the first post, I discussed how often inspections should be carried out...
Most installations involve some form of lightning protection system which is connected to an earth electrode. The function of the earth electrode is to...
American inventor Thomas Alva Edison was born in Milan, Ohio on February 11, 1847. He was the youngest of seven children and received little formal schooling...
A single phase system is perhaps the most common type of system most people are familiar with. This is what people have in their homes and what appliances...
This post is quick introduction and overview to different railway electrification voltages used in answer to a question sent in via email. While there...
Many questions sent in to the site are in connection with motor starting and in particular star-delta. For all but the simplest application, there is...
The image (reproduced from IEC 60909) shows a typical fault in an ac system. From the illustration it can seen that there is an initial dc component ...
A frequent problem in fault calculations is the obtaining of equipment parameters. While it is always preferable to use the actual parameters of the equipment...
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Various techniques exist to enable the correct selection of batteries for UPS applications. The procedure described below is one of the more common. ...
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