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Archive: Category «Energy and Power»

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, for example, must be convinced… 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 as a current-carrying conductor to… 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 in the database, then you… 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 of electric shock. The most… 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 difficult to change. Power may… 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 deal of research on lightning… Read more

Dec 19, 2010 | Edvard

Characteristics of Lightning Strokes

Sources Of The Electric Energy – Generation

There are a number of ways to produce electricity, the most common commercial way being the use of a synchronous generator driven by a rotating turbine. The combination is called a turbine-generator. The most common… Read more

Dec 10, 2010 | Edvard

Wind Power Turbine Diagram

Historical Review of Power System Stability Problems

As electric power systems have evolved over the last century, different forms of instability have emerged as being important during different periods. The methods of analysis and resolution of stability problems were influenced by the… Read more

Dec 08, 2010 | Edvard

Historical Review of Power System

Time-Current Curves explained in details

Time-current curves are used to show how fast a breaker will trip at any magnitude of current. The following illustration shows how a time-current curve works. The figures along the bottom (horizontal axis) represent current… Read more

Dec 07, 2010 | Edvard

Time-Current Curves

Economic advantages of power factor correction

Power supply authorities apply a tariff system which imposes penalties on the drawing of energy with a monthly average power factor lower than 0.9. The contracts applied are different from country to country and can… Read more

Dec 04, 2010 | Edvard

Economic advantages of power factor correction

Electrical Certificates

There is often confusion about what is commonly referred to as an “Electrical Certificate”. There are essentially 3 types of documents or certificates. Each imply different type of certification. “Electrical Installation Certificate” (EIC) is the… Read more

Dec 02, 2010 | Edvard

Electrical Certificate, Tests and Report

Electrical Power System Overcurrents

Electrical power systems must be designed to serve  a variety of loads safely and reliably. Effective  control of short-circuit current, or fault current as  it is commonly called, is a major consideration  when designing coordinated… Read more

Nov 27, 2010 | Edvard

Harmonic Distortion

Harmonic distortion is caused by nonlinear devices in the power system. A nonlinear device is one in which the current is not proportional to the applied voltage. Figure 1 illustrates this concept by the case… Read more

Nov 23, 2010 | Edvard

harmonic_distortion

Battery monitoring and maintenance guidelines

Battery monitoring has become a very popular topic, and many companies have either purchased equipment or are in the process of evaluating these systems. This article discusses why monitoring is important, and what parameters must… Read more

Nov 21, 2010 | Edvard

Battery Monitoring And Maintenance

The Need for Reactive Power Compensation

Except in a very few special situations, electrical energy is generated, transmitted, distributed, and utilized as alternating current (AC). However, alternating current has several distinct disadvantages. One of these is the necessity of reactive power… Read more

Nov 19, 2010 | Edvard

Power Factor Correction


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