September 2017 (1) October 2016 (1) January 2015 (1) December 2014 (1) November 2014 (1) October 2014 (1) August 2014 (1) July 2014 (1) June 2014 (1) May 2014 (1) April 2014 (1) February 2014 (1) January 2014 (2) November 2013 (1) October 2013 (2) October 2013 (3) September 2013 (3) August 2013 (2) July 2013 (2) May 2013 (4) April 2013 (3) February 2013 (4) January 2013 (3) December 2012 (1) November 2012 (2) September 2012 (2) August 2012 (5) July 2012 (4) June 2012 (14) May 2012 (18) April 2012 (18) February 2012 (4) January 2012 (5) December 2011 (4) November 2011 (5) October 2011 (6) October 2011 (2) September 2011 (2) August 2011 (2) July 2011 (1) May 2011 (2) April 2011 (2) November 2010 (2) October 2010 (1) September 2010 (1) August 2010 (3) July 2010 (2) June 2010 (4) May 2010 (8) April 2010 (4) February 2010 (1) January 2010 (1) November 2009 (2) October 2009 (1) September 2009 (5) August 2009 (1) July 2009 (1) June 2009 (2) May 2009 (1) April 2009 (5) February 2009 (3)


How Electrical Circuits Work

If you have no idea how electrical circuits work, or what people mean then they talk about volts and amps, hopefully I can shed a bit light.  I’m intending...

ABB Technical Guides - Motor Operation

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

Introduction to Traction Substations

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

Why use catalogues

I'm a fan of using manufacturers catalogues. There are two main reasons for this. Firstly, if your involved in the purchase of equipment, you will likely...

Understanding electric motor insulation & temperature

Anyone specifying or using electric motors should have a basic understanding how the insulation is related to temperature. Three classes of insulation...

Motor Starting - Introduction

Motor starting and its associated problems are well-known to many people who have worked on large industrial processes. However, these things are, of course...

Cable Sizing Software

When sizing cables nearly, everyone uses some form of software. This ranges from homespun spreadsheets to complex network analyses software. Each has its...

What does N+1 mean?

The term 'N+1' relates to redundancy and simply means that if you required 'N' items of equipment for something to work, you would have one additional...

Load Flow Study – how they work

A load flow study is the analysis of an electrical network carried out by an electrical engineer. The purpose is to understand how power flows around...

Alternating Current Circuits

Alternating current (a.c.) is the backbone of modern electrical power distribution. In this article I’ll be pulling some of the more important concepts...

Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note