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

Many questions sent in to the site are in connection with motor starting and in particular star-delta.  For all but the simplest application, there is...

Problems on achieving maximum voltage drop within an installation come up often. Depending where you live, local regulations will have different limits...

Years ago I was told that you should always try to write the best report you can.  Many years later I still think on this as one of the better pieces of...

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

The image (reproduced from IEC 60909) shows a typical fault in an ac system.  From the illustration it can seen that there is an initial dc component ...

A quick post in connection with an email question: Live Tank - the circuit breaker the switching unit is located in an insulator bushing which is live...

Photovoltaic (PV) systems are typically more efficient when connected in parallel with a main power gird. During periods when the PV system generates energy...

Two driverless and solar power vans have departed from Italy on their way to China via the silk road. During the 13,000 kM trip the vans will drive themselves...

Using software in our  work is essential for most of us and we are becoming even more dependant on it's use.  While software is a great asset, many times...