Wind Power
What about the world’s wind resources?
When evaluating different methods of power generation some of the main questions inevitably concern the fuel proposed. Is there enough of it? Is it in the right places? It is available when you want it? What does it cost? What… Read more
Jun 18, 2011 | By Edvard Csanyi
High Voltage
HIS – Highly Integrated Switchgear, Type 8DQ1
No more losing sleep over space restrictions: HIS, the gas-insulated switchgear for indoor and outdoor use requires less than half the space of comparable air-insulated switchgear. The 8DQ1-type HIS is a compact switchgear solution for rated voltages of up to… Read more
Jun 17, 2011 | By Edvard Csanyi
Energy and Power
Thumbs down to the nuclear energy
Although for decades the arguments against nuclear power have been –and still are- strong and valid, there is an increasing group of nuclear companies supported by scientists and politicians, who say we need nuclear power to fight climate change and… Read more
Jun 15, 2011 | By Edvard Csanyi
Energy Efficiency
How to achieve energy-efficient lighting?
Technological development has focused primarily on such things as the fluorescent lamp and the ballast and has chiefly been geared to boosting their luminous efficacy. The chart “Milestones to energy conservation with modern lighting” shows how much has been achieved… Read more
Jun 13, 2011 | By Edvard Csanyi
Low Voltage
How residual current device (RCD) works?
The residual current device (rcd) is used to detect earth fault currents and to interrupt supply if an earth current flows. The main application is to prevent electrocution but RCDs can also be used to protect equipment, especially against fire…. Read more
Jun 11, 2011 | By Edvard Csanyi
HVAC
How heat pump works?
The heat pump transfers the heat between the heating/cooling distribution system and the earth connection. It is the basic building block of the GSHP system. The most common type of heat pump used with GSHP systems is a “water-to-air” unit… Read more
Jun 10, 2011 | By Edvard Csanyi
Renewable Energy
Stand-Alone PV Systems
Stand-alone PV (photovoltaic) systems are used when it is impractical to connect to the utility grid. Common standalone systems include PV-powered fans, water pumping systems, portable highway signs, and power systems for remote installations, such as cabins, communications repeater stations,… Read more
Jun 08, 2011 | By Edvard Csanyi
Medium Voltage
ABB – AIS UniGear ZS1 design features
UniGear ZS1 is medium voltage switchgear with a metal enclosure, suitable for indoor installations. Metal partitions segregate the compartments from each other and the live parts are air-insulated. Since the switchgear is highly modular type, this make simple selection of… Read more
Jun 06, 2011 | By Edvard Csanyi
High Voltage
Construction and service life of GIS
GIS is assembled of standard equipment modules (circuit breaker, current transformers, voltage transformers, disconnect and ground switches, interconnecting bus, surge arresters, and connections to the rest of the electric power system) to match the electrical one-line diagram of the substation…. Read more
Jun 04, 2011 | By Edvard Csanyi
Hydropower
How to determine the hydropower available at site
To determine the power available at a site, head and flow measurements must be taken. Flow is the rate at which water moves, measured in liters per minute (I/m) or gallons per minute (gpm). This can be measured by channeling… Read more
Jun 03, 2011 | By Edvard Csanyi
Energy and Power
How contactor controls an electric motor?
When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name: contactor. Contactors typically have multiple contacts, and those contacts are usually (but not always) normally-open, so that… Read more
Jun 01, 2011 | By Edvard Csanyi
Wind Power
Integrating wind energy into the electricity network
One of the most frequent misunderstandings occurring in the public discussion about integrating wind energy into the electricity network is that it is treated in isolation. An electricity system is in practice much like a massive bath tub, with hundreds… Read more
May 30, 2011 | By Edvard Csanyi
High Voltage
GIS control system
For ease of operation and convenience in wiring the GIS back to the substation control room, a local control cabinet (LCC) is provided for each circuit breaker position (Figure 1). The control and power wires for all the operating mechanisms,… Read more
May 29, 2011 | By Edvard Csanyi
Transformers
GEAFOL – cast-resin transformer
The Siemens’s transformer GEAFOL principle has succeeded in producing transformers with excellent electrical, mechanical and thermal characteristics, which have also proved to be particularly compatible with the environment. GEAFOL transformers are insulated with an epoxy resin/quartz powder mixture. This is… Read more
May 27, 2011 | By Edvard Csanyi
Energy and Power
Technology future – The cost of inaction
Without new thinking on technology intervention, the future looks bleak. Unless the role of technology in the global economy is reconsidered, we risk becoming powerless to feed a growing population, combat climate change, meet energy demands and adapt to dwindling… Read more
May 25, 2011 | By Edvard Csanyi
