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 ...

Fire resistant and fire retardant cable sheaths are design to resist combustion and limit the propagation of flames. Low smokes cables have a sheath designed...

If two dissimilar metals are touching and an external conducting path exists, corrosion of one the metals can take place.  Moisture or other materials...

I was digging in my bookshelf and came across the 80th Anniversary Association of Mine Resident Engineers, Papers and Discussions Commemorative Edition...

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...

Electrical notes are a collaborative collection of electrical engineering information and educational material. Any registered user can add content. ...

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

The calculation of current in a three phase system has been brought up on our site feedback and is a discussion I seem to get involved in every now and...

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

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...