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

A UPS is an uninterruptible power supply.  It is a device which maintains a continuous supply of electrical power, even in the event of failure of the...

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...

We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.

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...

Tapping your forearm or hand with a finger could soon be the way you interact with gadgets. A new technology created by Microsoft and Carnegie Mellon ...

Lead acid batteries are cost effect and reliable, making them suitable for many applications.This note examines topics of interest associated with the...

Have an opinion or something to say, want to ask or answer questions, share your knowledge then use our site to do it . As a community of people interested...

Following on from my post on railway electrification voltages, I thought an introduction to traction substations would be a good idea. Traction substations...

There are a lot of interesting two page type notes on various medium voltage topics – switchgear, circuit breakers, bus systems etc. It is on the Siemens...