Capacitors have numerous applications in electrical and electronic applications.  This note examines the use of capacitors to store electrical energy....

A battery consists of one or more cells, each of which use stored chemical energy to produce electrical energy, There are many types of cells and these...

Following on from my post on railway electrification voltages, I thought an introduction to traction substations would be a good idea. Traction substations...

ABB has produced a range of technical guides that offer concise explanations of the major technologies and technical issues in low voltage AC drives. ...

Using software in our  work is essential for most of us and we are becoming even more dependant on it's use.  While software is a great asset, many times...

Many medium voltage (MV) indoor switchgear rooms  exist worldwide. The complexity of these rooms varies considerably depending on location, function and...

This is the second post in a series of two on periodic electrical inspections. In the first post, I discussed how often inspections should be carried out...

I have been thinking recently that there appears to be less professional integrity around than when I first started my career in electrical engineering...

Per unit fault calculations is a method whereby system impedances and quantities are normalised across different voltage levels to a common base.  By removing...

This article gives an introduction to IEEE 485 method for the selection and calculation of battery capacity.