Various techniques exist to enable the correct selection of batteries for UPS applications.  The procedure described below is one of the more common. ...

IEC 61439 'Low-voltage switchgear and controlgear assemblies', specifies standard arrangements of switchboard (call forms of internal separation). The...

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

This is the second post in a series of two on periodic electrical inspections. In the first post, I discussed how often inspections should be carried out...

Fault calculations are one of the most common types of calculation carried out during the design and analysis of electrical systems. These calculations...

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

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

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...

This post is quick introduction and overview to different railway electrification voltages used in answer to a question sent in via email. While there...

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