Fundamental electrical engineering concepts and theory
Dielectrics (insulating materials for example) when subjected to a varying electric field, will have some energy loss. The varying electric field causes...
Fault calculations are one of the most common types of calculation carried out during the design and analysis of electrical systems. These calculations...
IEC 61439 'Low-voltage switchgear and controlgear assemblies', specifies standard arrangements of switchboard (call forms of internal separation). The...
This article gives an introduction to IEEE 485 method for the selection and calculation of battery capacity.
Modelica is an open source (free) software language for modelling complex systems. Having never used it before, I thought I would download a development...
If you at all familiar with programs like office and outlook, then adding and editing posts is pretty straightforward and intuitive. However, there are...
Most installations involve some form of lightning protection system which is connected to an earth electrode. The function of the earth electrode is to...
When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...
Exposure to time varying magnetic fields, from power frequencies to the gigahertz range can have harmful consequences. A lot of research has been conducted...
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 ...
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