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Monthly Archive for: «March, 2011»

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-… Read more

Mar 30, 2011 | By Edvard

MiCOM P139 Feeder Management and Bay Control
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… Read more

Mar 28, 2011 | By Edvard

Lights up, the facts about lighting
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… Read more

Mar 25, 2011 | By Edvard

Nikola Tesla's view on war
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… Read more

Mar 24, 2011 | By Edvard

Dual nature of light
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… Read more

Mar 23, 2011 | By Edvard

Offshore wind farms - transmission
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… Read more

Mar 22, 2011 | By Edvard

Colour classification according to the C.I.E. chromatic diagram
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… Read more

Mar 19, 2011 | By Edvard

Personal Protective Ground Cable Assembly
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… Read more

Mar 18, 2011 | By Edvard

Please help Japan people
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… Read more

Mar 18, 2011 | By Edvard

Cross-sectional view of the panel and multifunctional CT
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… Read more

Mar 17, 2011 | By Edvard

Surge protection of cells and inverter - DC side
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… Read more

Mar 16, 2011 | By Edvard

Benefits of biomass energy
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… Read more

Mar 15, 2011 | By Edvard

Induction machines
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… Read more

Mar 14, 2011 | By Edvard

Offshore Wind
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… Read more

Mar 12, 2011 | By Edvard



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