Most installations involve some form of lightning protection system which is connected to an earth electrode.  The function of the earth electrode is to...

Insulation on a motor prevents interconnection of windings and the winding to earth.  When looking at motors, it is important to understand how the insulation...

Traditionally substations have used circuit breakers, current transformers (CT), voltage transformers (VT) and protection relays all wired together using...

Electromechanical relays have been the traditional backbone of electrical protection systems.  While over recent years these have been replaced by microprocessor...

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

Request to look at induction motor starting time have come up a few times on the site. Hopefully in this post, I give you guys some idea on how to calculate...

Often document control is dictated by project requirements, for example a particular organisation may have an existing numbering system. Existing company...

For unbalance conditions the calculation of fault currents is more complex. One method of dealing with this is symmetrical components. Using symmetrical...

Often us engineers get so bogged down in equations, using software, producing drawings and writing specifications that this becomes the sole focus.   ...

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