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Get the essence of electrical engineering in the form of specialized HV/MV/LV technical articles, electrical guides, and papers.

Archive: Category «Energy and Power»

Early years of Nikola Tesla

Nikola Tesla was born “at the stroke of midnight” with lightning striking during a summer storm. He was born in Croatia in the Austro-Hungarian Empire. The midwife commented, “He’ll be… Read more

Mar 05, 2011 | Edvard

Nikola Tesla - Early Years

Protection Relay – ANSI Standards

In the design of electrical power systems, the ANSI Standard Device Numbers denote what features a protective device supports (such as a relay or circuit breaker). These types of devices… Read more

Feb 22, 2011 | Edvard

ANSI codes for protection relays

AC Vs. DC

What’s this thing about AC anyway? A little history lesson might be in order. It all started when Edison built the first incandescent bulb and the power station to light… Read more

Feb 08, 2011 | Edvard

AC vs. DC

Electrically Held Contactors – Siemens

Most lighting and heating applications require a contactor to control the loads. One type of contactor is an electrically held contactor, which is similar to a magnetic starter. Unlike a… Read more

Feb 05, 2011 | Edvard

Electrically Held Contactors - Siemens type CLM

How To Reduce Energy Cost?

The main motivation for decision makers to take an interest in energy control solutions is economic efficiency. When deciding whether to invest in improvement work, the manager of a building,… Read more

Jan 28, 2011 | Edvard

How To Reduce Energy Cost?

Grounded Systems

Grounded systems are equipped with a grounded conductor that is required per NEC Section 250- 23(b) to be run to each service disconnecting means. The grounded conductor can be used… Read more

Jan 26, 2011 | Edvard

Ecodial 3 – FAQ’s

Remark : You may renumber the functional names with the Automatic numbering of the View menu. Version 3.2 of Ecodial works from a cable database. If such a cable exists… Read more

Jan 22, 2011 | Edvard

Ecodial 3 - FAQ's

Do You Understand What Is Electric Shock?

Electric current passing through the body, particularly alternating current at power frequencies of 50 Hz and 60 Hz, may disrupt the nervous system, causing muscular reaction and the painful sensation… Read more

Jan 02, 2011 | Edvard

Electric shock danger sign

Siemens – Busway Purpose and Definition

Commercial and industrial distribution systems use several methods to transport electrical energy. These methods may include heavy conductors run in trays or conduit. Once installed, cable and conduit assemblies are… Read more

Dec 23, 2010 | Edvard

Electrical power can be supplied to any area of a building by connecting standard lengths of busway.

Characteristics of Lightning Strokes

Lightning, one of Mother Nature’s most spectacular events, started to appear significantly demystified after Franklin showed its electric nature with his famous electrical kite experiment in 1752. Although a great… Read more

Dec 19, 2010 | Edvard

Characteristics of Lightning Strokes


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