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
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
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
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
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
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
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
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
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
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 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
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
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
