Offshore wind farms – transmission cables
The European wind power industry is increasingly turning to the offshore wind resource, and the United States will draw on the Europeans’ experience as we begin to plan offshore wind… Read more
Mar 23, 2011 | By Edvard Csanyi
Colour classification and temperature
Colour is a subjective psycho physiologic interpretation of the visible electromagnetic spectrum. Luminous sensations or images, produced in our retina, are sent to the brain and interpreted as a set… Read more
Mar 22, 2011 | By Edvard Csanyi
PIX metal-clad switchgear – Schneider Electric
The PIX metal-clad switchboards are extensible on both sides and consist of modular functional units, linked by a busbar, and connected to the substation earth via an earthing bus. The… Read more
Mar 21, 2011 | By Edvard Csanyi
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… Read more
Mar 19, 2011 | By Edvard Csanyi
Please, help brave Japan people!
As you already know, Japan is suffering from the greatest disaster since world war 2. A tremendous earthquake, a huge tsunami and now radiation leaks have caused untold damage in… Read more
Mar 18, 2011 | By Edvard Csanyi
Current transformers (CTs) in a few words
A current transformer is defined as as an instrument transformer in which the secondary current is substantially proportional to the primary current (under normal conditions of operation) and differs in… Read more
Mar 18, 2011 | By Edvard Csanyi
Surge protection of cells and inverter – DC side
Providing power with photovoltaic solar panels is tremendously interesting in the context of renewable energy sources, as regards economical LV photovoltaic systems connected to the public electricity network. Because of… Read more
Mar 17, 2011 | By Edvard Csanyi
Benefits of biomass energy
Biomass in the form of fuelwood was perhaps the first energy source used by human beings and was the main fuel till the industrial revolution, after which fossil fuels like… Read more
Mar 16, 2011 | By Edvard Csanyi
Induction machines – historical touch
Faraday discovered the electromagnetic induction law around 1831 and Maxwell formulated the laws of electricity (or Maxwell’s equations) around 1860. The knowledge was ripe for the invention of the induction… Read more
Mar 15, 2011 | By Edvard Csanyi
Offshore Wind
As on land, offshore wind developers have to ensure that their turbines and transmission infrastructure do not interfere with marine life and ecosystems. National regulations ensure that project developers assess… Read more
Mar 14, 2011 | By Edvard Csanyi
How to choose transformer rating?
When an installation is to be supplied directly from a MV/LV transformer and the maximum apparent-power loading of the installation has been determined, a suitable rating for the transformer can… Read more
Mar 12, 2011 | By Edvard Csanyi
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… Read more
Mar 11, 2011 | By Edvard Csanyi
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… Read more
Mar 10, 2011 | By Edvard Csanyi
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… Read more
Mar 09, 2011 | By Edvard Csanyi
D’Arsonval Meter Movement
The most commonly used sensing mechanism used in DC ammeters, voltmeters, and ohm meters is a current-sensing device called a D’Arsonval meter movement (Figure 1). The D’Arsonval movement is a… Read more
Mar 08, 2011 | By Edvard Csanyi