Three phase systems are derived from three separate windings, either connected in delta or star (wye). Each winding can be treated separately, leading...

Motor starting and its associated problems are well-known to many people who have worked on large industrial processes. However, these things are, of course...

It wasn't so long ago I was telling someone that I don't use rules of thumb as most things are easily calculated anyhow.   As it turns out I last week...

Depending where in the world you work, you are likely following one of two standards International Electrotechnical Commission (IEC) National...

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...

If two dissimilar metals are touching and an external conducting path exists, corrosion of one the metals can take place.  Moisture or other materials...

When sizing cables nearly, everyone uses some form of software. This ranges from homespun spreadsheets to complex network analyses software. Each has its...

Modelica is an open source (free) software language for modelling complex systems. Having never used it before, I thought I would download a development...

Our cable sizing tool is one of the more popular tools on the site.  The tool enables cables to be sized in compliance with BS 7671 (the IEE Wiring Regulations...

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...