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.   ...

"I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong...

GE have put together a time-lapse video shown flight take-off and landings at some airports. An interesting view:

A recurring theme on our forums is cable sizing. Now many installations are unique and require special consideration. However, a lot of the time things...

When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...

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

Electrical engineering is a field that covers a wide variety of sub-fields, including electricity and electronics. It is a field that goes back to the...

When selecting a generator, there are inherent limits on the active and reactive power which can be delivered. Generators are normally sized for a certain...

Three phase systems are derived from three separate windings, either connected in delta or star (wye). Each winding can be treated separately, leading...