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...

I was digging in my bookshelf and came across the 80th Anniversary Association of Mine Resident Engineers, Papers and Discussions Commemorative Edition...

We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.

Lead acid batteries are cost effect and reliable, making them suitable for many applications.This note examines topics of interest associated with the...

If your are ever called out to troubleshoot something on your electrical system, one of the first things consider is the supply voltage. You want to ensure...

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

Electromechanical relays have been the traditional backbone of electrical protection systems.  While over recent years these have been replaced by microprocessor...

Fault calculations are one of the most common types of calculation carried out during the design and analysis of electrical systems. These calculations...

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...

I was having a conversation the other day about voltage levels.  While everyone was in agreement that low voltage was 1000 V and less, there was more confusion...