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

The mobile phone was born in 1973. They were the size of a brick and weighed a couple of kg, making them difficult to fit into your pocket. At a few thousand...

Collection of links to various places with useful motor information. I’ll try and return to the page every now and again to update it with any motor notes...

The other day I was talking to a colleague who is a building services consultant.  Despite regularly specifying dry-type/cast resin transformers he was...

Here’s list of some famous scientists. Deliberately short, with the aim to provide a quick memory jog or overview. If your looking for more detailed information...

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

For unbalance conditions the calculation of fault currents is more complex. One method of dealing with this is symmetrical components. Using symmetrical...

Problems on achieving maximum voltage drop within an installation come up often. Depending where you live, local regulations will have different limits...

Our IEE cable sizing was wrote a few years ago and had become rough around the edges. I thought it was time to give the tool a service. Unfortunately when...

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