The inventor of the first visible light-emitting diode makes history again this year as it begins to show customers a 40-watt replacement GE Energy Smart...
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Variable frequency drives are widely used to control the speed of ac motors. This note looks at the mechanisms which enable drive units to control the...
Modelica is an open source (free) software language for modelling complex systems. Having never used it before, I thought I would download a development...
A battery consists of one or more cells, each of which use stored chemical energy to produce electrical energy, There are many types of cells and these...
If you want to check a circuit is dead (not live), you should always use the three point method. First check a known live circuit, then check the dead...
Depending where in the world you work, you are likely following one of two standards International Electrotechnical Commission (IEC) National...
In three phase systems, the use of transformers with three windings (or legs) per side is common. These three windings are often connected in delta or...
Estimating maximum demand is a topic frequently discussed. Working out how much power to allow for a building can be very subjective . Allowing too much...
Power cables can basically be classified into earthed and unearthed cables, where earthed and unearthed refer to the application for which the cable is...
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