When looking to develop a proper testing and maintenance schedule for low voltage circuit breakers there is only two options; primary current injection testing or secondary current injection testing. Proper maintenance is essential for power circuit breaker reliability and safety. The advantages and disadvantages of each testing method will be described below. Primary Current Injection

Modeling Earth as a Rotating Solenoid Coil Greg Poole Electrical Power Engineer Pilot Hill, CA USA Abstract—Presented in this manuscript are conventional electrical engineering tools to model the earth as a rotating electrical machine. Calculations using known parameters of the earth and measured field data has resulted in new understanding of the earth’s electrical system

Benjamin Franklin (1706-1790) was not only a scientist, but also an engineer. More than a decade before James Watt invented his improved steam engine and launched the industrial revolution in England, Benjamin Franklin devised a working electric motor. Electrical technology in Franklin’s day consisted mainly of scientific instruments. By 1745, electrical scientists exploring the nature of

At long last, I get to blog about the paper that first piqued my interest about the research of Michael Faraday!  If you haven’t been following my Faraday posts, let me give a quick recap: Michael Faraday (1791-1867) was one of the greatest experimental physicists of all time, and the discoverer of some of the most important

Safety In general, any outdoor activity in bad weather constitutes a risk and should not be performed without a thorough risk assessment and appropriate authorization. A severe risk is posed by lightning. Doble Engineering does not recommend testing in any situation where lightning is a present or an imminent threat. Equipment Status and Motivation for