This morning I was explaining how differential protection works to a junior engineer. To give him something to read I opened up the NPAG (Network Protection...

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

The new standard IEC 61439 replaces the old 60439. Compared to the old standard, the new 61439 is a more clearly defined and takes into account the assembly...

Estimating maximum demand is a topic frequently discussed. Working out how much power to allow for a building can be very subjective . Allowing too much...

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...

A single phase system is perhaps the most common type of system most people are familiar with. This is what people have in their homes and what appliances...

myElectrical does not support or promote the use of copyrighted material without the copyright owner's consent. If you believe that material for which...

In a previous article I looked at the dc resistance of conductors and in this article we turn our attention to ac resistance. If you have not read the...

Visitors who like to type web address rather then click menus may be interested in how our URL structure works.

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...