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Archive: Category «Energy and Power»

Scientist and inventor – Mihailo Pupin

Mihailo (Mihailo Idvorsky) Pupin was born in Idvor, Banat, October 9, 1854. Received his academic education at Columbia College, New York, and his scientific education at the universities of Cambridge, England,and Berlin, Germany. Obtained his… Read more

Apr 11, 2011 | Edvard

Dr. Mihajlo Pupin (1854-1935), inventor and scientist

Switchboard Construction Basics For Engineers

Power distribution systems are used in every residential, commercial, and industrial building to safely control the distribution of electrical power throughout the facility. Most of us are familiar with the power distribution system found in… Read more

Apr 09, 2011 | Edvard

Switchboard Construction - Siemens Basics

Tesla’s view on war

Tesla was opposed to wars in general. Nikola Tesla did devise protective measures that would prevent wars. Tesla found exceptions in some wars and some justifiable situations. Tesla envisioned that more terrible weapons were going… Read more

Mar 25, 2011 | Edvard

Nikola Tesla's view on war

Protective Grounding Requirements

Each region shall implement procedures to ensure the adequacy of protective grounds and shall periodically review grounding practices at each facility to determine the proper size, length, and number (if parallel grounds are required) of… Read more

Mar 19, 2011 | Edvard

Personal Protective Ground Cable Assembly

Tesla’s death, New York Times 1943

Tesla died alone in the hotel New Yorker of heart failure, some time between the evening of January 5 and the morning of January 8, 1943. Despite selling his AC electricity patents, Tesla was essentially… Read more

Mar 11, 2011 | Edvard

Tesla's death, New York Times 1943

How circuit breaker trip unit works?

In addition to providing a means to open and close its contacts manually, a circuit breaker must automatically open its contacts when an overcurrent condition is sensed. The trip unit is the part of the… Read more

Mar 10, 2011 | Edvard

How circuit breaker trip unit works?

Calculating lightning strike distance

Return stroke current magnitude and strike distance (length of the last stepped leader) are interrelated. A number of equations have been proposed for determining the striking distance. The principal ones are as follows: S =… Read more

Mar 09, 2011 | Edvard

Calculating lightning strike distance

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 a child of the storm,”… Read more

Mar 05, 2011 | Edvard

Nikola Tesla - Early Years

How to improve the power quality with harmonic filters

In electrical plants the loads draw from the network electric power (active) as power supply source (e.g. personal computers, printers, diagnostic equipment, etc.) or convert it into another form of energy (e.g. electrical lamps or… Read more

Mar 01, 2011 | Edvard

How To Improve The Power Quality With Harmonic filters

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 protect electrical systems and components… Read more

Feb 22, 2011 | Edvard

ANSI codes for protection relays

Technology Innovation Is Everybody’s Business!

For close to 10,000 years, science and technology have been at the heart of economic growth and social prosperity. From the agricultural revolution to the information revolution, advances in society have been underpinned by new… Read more

Feb 18, 2011 | Edvard

Technology Innovation

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 it. A big disadvantage of… 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 magnetic starter, however, a lighting… Read more

Feb 05, 2011 | Edvard

Electrically Held Contactors - Siemens type CLM


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