Fundamental electrical engineering concepts and theory
Electromechanical relays have been the traditional backbone of electrical protection systems. While over recent years these have been replaced by microprocessor...
In the previous note we looked at the approach taken by the standard to the sizing of cables and illustrated this with an example. We then looked at one...
A load flow study is the analysis of an electrical network carried out by an electrical engineer. The purpose is to understand how power flows around...
IEC 61439 'Low-voltage switchgear and controlgear assemblies', specifies standard arrangements of switchboard (call forms of internal separation). The...
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...
Cable insulation is used to provide electrical separation between conductors of a cable. During the historical development of cables, numerous types...
The following tables provide quick order of magnitude fault levels for a a range of typical low voltage situations.
Power factor is the ratio between the real power (P in kW) and apparent power (S in kVA) drawn by an electrical load. The reactive power (Q in kVAr)...
The European Union is implementing a voluntary code of practice for participants with the aim of improving the overall efficiency of data centres. As part...
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...
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