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

If you want to check a circuit is dead (not live), you should always use the three point method. First check a known live circuit, then check the dead...

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

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...

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

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...

Modelica is an open source (free) software language for modelling complex systems. Having never used it before, I thought I would download a development...

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...

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

We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.