This article gives an introduction to IEEE 485 method for the selection and calculation of battery capacity.

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

I was having a conversation the other day about voltage levels.  While everyone was in agreement that low voltage was 1000 V and less, there was more confusion...

Variable frequency drives are widely used to control the speed of ac motors.  This note looks at the mechanisms which enable drive units to control the...

Per unit fault calculations is a method whereby system impedances and quantities are normalised across different voltage levels to a common base.  By removing...

Coils of wire on the rotor carry a d.c. current which generates a magnetic field. A stator magnetic field is created using either permanent magnets or...

Recently I have seen a few interesting articles on viable cold fusion; the combining of atoms at room like temperatures to create boundless energy. Now...

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

Delum, who had watched all in silence, his face empty of expression, now spoke in turn. ' "Lead us, Warleader, into glory."' Reading is something I do...

A lot of our members work in countries where PPE (personal protective equipment) is regulated or they work for companies/organizations which take employee...