High Voltage
GIS vs AIS – Life cycle assessment
In order to ensure the future supply of electricity we require sustainable concepts that preserve resources and do not harm our environment. Humankind needs a reliable and secure power supply… Read more
Jul 14, 2011 | By Edvard
Energy and Power
Fire Protection Measures
The measures to mitigate or lessen fire hazards are normally called “fire protection measures”. The National Fire Protection Association NFPA (U.S. organization charged with creating and maintaining minimum standards and… Read more
Jul 13, 2011 | By Edvard
High Voltage
Power Fuses in High Voltage
Power fuses are a generally accepted means of protecting power transformers in distribution substations. The primary purpose of a power fuse is to provide interruption of permanent faults. Fusing is… Read more
Jul 11, 2011 | By Edvard
Solar Power
Long history of solar energy
As with hydropower, solar energy has a long history. Many pre-historic cultures used it to warm their dwellings, dry their clothes, and cure their food. The importance of solar energy… Read more
Jul 10, 2011 | By Edvard
Energy and Power
Fuses – Principles of design and operation
A fuse consists of a replaceable part (the fuselink) and a fuse holder. Examples of fuse holders are shown in Fig. 1. The simplest fuselink is a length of wire…. Read more
Jul 09, 2011 | By Edvard
Energy and Power
Area classification in potentially explosive atmospheres
Area classification defines hazardous areas on the basis of the probability of a flammable atmosphere being present. It is a legal requirement under DSEAR for any employer whose business involves… Read more
Jul 08, 2011 | By Edvard
Energy and Power
Generator tripping as stability control
Generator tripping is an effective (cost-effective) control especially if hydro units are used. Tripping of fossil units, especially gas- or oil-fired units, may be attractive if tripping to house load… Read more
Jul 06, 2011 | By Edvard
SCADA
SCADA communication vulnerabilities
Cyber security engineering is expensive. However, the presence of vulnerabilities requires it. In this section we list vulnerabilities we typically see in SCADA systems. The order in the list of… Read more
Jul 04, 2011 | By Edvard
Electronics
Designing Raw DC Power Supplies
Every type of electrical or electronic apparatus needs a source of electrical energy to function. The source of electrical energy is called the power supply. The two main classifications of… Read more
Jul 03, 2011 | By Sa'ad Eddin
Energy Efficiency
Setting circuit breaker tripping with MS Excel spreadsheet
The protective unit of circuit breaker MUST fulfill: Instantaneous trip setting Im < Iscmin for a circuit-breaker Fusion current Ia < Iscmin for a fuse The protective unit (or device)… Read more
Jul 02, 2011 | By Edvard
Energy and Power
Fuel cells in power section
In 1839, a British Jurist and an amateur physicist named William Grove first discovered the principle of the fuel cell. Grove utilized four large cells, each containing hydrogen and oxygen,… Read more
Jul 01, 2011 | By Edvard
Wind Power
Large and Small Wind Turbines are Different
Wind turbines are generally divided into two broad categories based on their rated capacity and their intended applications. Small wind turbines are typically less than 50 kW in size, but… Read more
Jun 29, 2011 | By Edvard
News
New download! Easy calculate size of solar panels!
For the purposes of this guide, we are assuming that the solar energy generated by the panels will be stored in a battery or number of batteries. The basic principle… Read more
Jun 28, 2011 | By Edvard
Energy and Power
Who was James Prescott Joule?
James Prescott Joule was born on Christmas Eve 1818 into a wealthy Salford brewing family. A sickly child, he was tutored at home where he indulged his fascination for electricity… Read more
Jun 27, 2011 | By Edvard
Biomass Energy
Typical applications of biomass
During Second World War the gasifiers were mainly employed for transportation purposes. However, in recent years the gasifiers have been employed mainly for stationary applications. For generating electricity, the producer… Read more
Jun 26, 2011 | By Edvard
