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

If you have a great idea or invent something the last thing you want is someone to steal the idea. One of the things you can do is protect the intellectual...

Often document control is dictated by project requirements, for example a particular organisation may have an existing numbering system. Existing company...

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  While over recent years these have been replaced by microprocessor...

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

Most installations involve some form of lightning protection system which is connected to an earth electrode.  The function of the earth electrode is to...

Request to look at induction motor starting time have come up a few times on the site. Hopefully in this post, I give you guys some idea on how to calculate...

The new standard IEC 61439 replaces the old 60439. Compared to the old standard, the new 61439 is a more clearly defined and takes into account the assembly...

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...

Just added a page to the tools, which will allow you to calculate the synchronous speed, slip and rated torque for an induction motor. Not a particularly...