Over the past year or so I've been involved in on going discussions related to referring fault levels from the secondary of a transformer to the primary...

IEEE TV has a part series of videos on wind power and it's implication. For a really good overview to the technologies and issues around wind power, these...

Variable frequency drives are widely used to control the speed of ac motors.  This note looks at the mechanisms which enable drive units to control the...

Within Europe the European Committee for Electrotechnical Standardization (CENELEC) has standardised the both the designation and colour of cables.   ...

Control theory looks at how systems work and are controlled from a mathematical view.  This note gives a brief introduction to some of the concepts – more...

The fundamental component of any analogue computer is the operational amplifier, or op amp. An operational amplifier (often called an op-amp,) is a high...

The following tables provide quick order of magnitude fault levels for a a range of typical low voltage situations.

The International System of Units (abbreviated SI) is the world's most widely used system of units.  The system consists of a set of units and prefixes...

Depending where in the world you work, you are likely following one of two standards International Electrotechnical Commission (IEC) National...

Various techniques exist to enable the correct selection of batteries for UPS applications.  The procedure described below is one of the more common. ...