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...
A quick post in connection with an email question: Live Tank - the circuit breaker the switching unit is located in an insulator bushing which is live...
When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...
Fault calculations are one of the most common types of calculation carried out during the design and analysis of electrical systems. These calculations...
The other day I came across an article in Technology Review on the development of a smart transformer. A professor at North Carolina State University is...
The (relatively new) switchgear and control gear standard, IEC 61439 'Low-voltage switchgear and controlgear assemblies' has three methods which can be...
For the past few years I have reading eBooks on my HTC touch phone. On and off I have debated buying an eReader and recently purchased a Sony PRS-300 ...
This article gives an introduction to IEEE 485 method for the selection and calculation of battery capacity.
The other day I was reading 'Night of the New Magicians' by Mary Pope Osborn with my son. The story is about a young boy and girl who travel back in time...
A recurring theme on our forums is cable sizing. Now many installations are unique and require special consideration. However, a lot of the time things...
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