High Voltage
MiCOM P139 – Feeder Management and Bay Control
MiCOM P139 is a cost-effective one-box solution for integrated numerical time-overcurrent protection and control. The unit’s protection functions provide selective short-circuit protection, ground fault protection and overload protection in medium- and high voltage systems. The systems can be operated as… Read more
Mar 30, 2011 | By Edvard Csanyi
Lighting
Lights up, the facts about lighting!
Illuminance is light falling on a surface measured in footcandles or lux. Distributed with an economic and visual plan, it becomes engineered lighting and, therefore, practical illumination. A lighting designer has four major objectives: Provide the visibility required based on… Read more
Mar 28, 2011 | By Edvard Csanyi
Energy and Power
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 to be developed in the… Read more
Mar 25, 2011 | By Edvard Csanyi
Lighting
Dual nature of light
Light has intrigued humankind for centuries. The most ancient theories considered light as something emitted by the human eye. Later on, it was understood that light should come from the objects seen and that it entered the eye producing the… Read more
Mar 24, 2011 | By Edvard Csanyi
Cables
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 farms. Short of generating hydrogen, or otherwise using or storing… Read more
Mar 23, 2011 | By Edvard Csanyi
Lighting
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 of monochromatic sensations which constitute the colour of the light…. Read more
Mar 22, 2011 | By Edvard Csanyi
Medium Voltage
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 cubicles are subdivided by metal partitions into four separate compartments,… Read more
Mar 21, 2011 | By Edvard Csanyi
Energy and Power
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 protective grounds. Regions shall maintain… Read more
Mar 19, 2011 | By Edvard Csanyi
Environment
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 this marvelous country of honest, industrious people. I am really… Read more
Mar 18, 2011 | By Edvard Csanyi
Transformers
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 phase from it by an angle which is approximately zero… Read more
Mar 18, 2011 | By Edvard Csanyi
Low Voltage
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 their exposition , frequently in isolated sites and of the… Read more
Mar 17, 2011 | By Edvard Csanyi
Biomass Energy
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 coal and oil replaced biomass as the main fuels. Biomass… Read more
Mar 16, 2011 | By Edvard Csanyi
Electric Motor
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 machine which has two fathers: Galileo Ferraris (1885) and Nicola… Read more
Mar 15, 2011 | By Edvard Csanyi
Wind Power
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 in both qualitative and quantitative terms the expected environmental impacts… Read more
Mar 14, 2011 | By Edvard Csanyi
Transformers
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 be decided, taking into account the following considerations: The possibility… Read more
Mar 12, 2011 | By Edvard Csanyi
