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

Carrying out a protection system discrimination study is critical to ensure the correct functioning of  the electrical system in the event of faults. ...

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

Years ago I was told that you should always try to write the best report you can.  Many years later I still think on this as one of the better pieces of...

While not as popular as it once was, frame leakage protection does still have some use in some circumstances.  In essence frame leakage is an earth fault...

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...

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 correct sizing of current transformers is required to ensure satisfactory operation of measuring instruments and protection relays. Several methods...

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...

Cable insulation is used to provide electrical separation between conductors of  a cable.  During the historical development of cables, numerous types...