Lighting
Architectural Luminaires – Unusual Visual Effects
Architectural luminaires are custom-designed and built fixtures that offer features not available in commercial luminaires. They can be built to fit specific locations or perform desired functions as well as provide unusual visual effects. These luminaires can be made from… Read more
Mar 31, 2012 | By Edvard Csanyi
High Voltage
Substation Main Functions and Classification
An electrical substation is an assemblage of electrical components including busbars, switchgear, power transformers, auxiliaries etc. These components are connected in a definite sequence such that a ckt. can be switched off during normal operation by manual command and also… Read more
Mar 29, 2012 | By Edvard Csanyi
Electrical Lectures
Capacitor Banks In Power System (part four)
Let us consider that there is a captive diesel generator (DG) the rating of which is specified as 1000kVA and PF 0.85. Rating in kVA specifies the maximum current the alternator can deliver at the system voltage. In the previous… Read more
Mar 27, 2012 | By Asif Eqbal
Energy and Power
Inspection of electrical installations in home (2)
Every installation deteriorates with use and age. Therefore, one must ensure that the safety of users is not put at risk and that the installation remains in a safe and serviceable condition. Continued from part I – Inspection of electrical… Read more
Mar 26, 2012 | By Edvard Csanyi
Energy and Power
Inspection of electrical installations in home (1)
Europe has an ageing housing stock. There are many homes with outdated wiring. This wiring is deteriorating, has been inappropriately amended, or is insufficient for the electrical loads of today’s typical household. Many of the homes have not undergone any… Read more
Mar 24, 2012 | By Edvard Csanyi
Energy and Power
Smart Grid Concept and Characteristics
A smart grid is an electricity network that uses digital and other advanced technologies to monitor and manage the transport of electricity from all generation sources to meet the varying electricity demands of end-users. Smart grids co-ordinate the needs and… Read more
Mar 21, 2012 | By Edvard Csanyi
High Voltage
How HV transmission lines affects humans and plants?
By increasing population of the world, towns are expanding, many buildings construct near high voltage overhead power transmission lines. The increase of power demand has increased the need for transmitting huge amount of power over long distances. Large transmission lines… Read more
Mar 20, 2012 | By Jignesh Parmar
Energy and Power
Few more words about energy stored in batteries
Electrochemical storage systems In this article various types of batteries are described. Most of them are technologically mature for practical use. First, six secondary battery types are listed: lead acid, NiCd/NiMH, Li-ion, metal air, sodium sulphur and sodium nickel chloride;… Read more
Mar 19, 2012 | By Edvard Csanyi
Electronics
Difference between step-up transformer and voltage amplifier
A step up transformer basically increases the magnitude of primary applied voltage that is increases the amplitude of voltage wave form. A voltage amplifier does exactly the same. Than a very strange but thinkable question comes what is the difference… Read more
Mar 17, 2012 | By Asif Eqbal
Cables
Copper or aluminium? Which one to use and when?
Apart from their electrical conductivity, the other technologically important properties of copper and aluminium differ so significantly (density is an obvious example) that their areas of application are and have always been clearly distinct. And not a lot has changed… Read more
Mar 16, 2012 | By Edvard Csanyi
Energy and Power
Megger Insulation Resistance Test
As you know good insulation has high resistance and poor insulation relatively low resistance. The actual resistance values can be higher or lower, depending upon such factors as the temperature or moisture content of the insulation (resistance decreases in temperature… Read more
Mar 13, 2012 | By Edvard Csanyi
Energy and Power
Different types of battery used for auxiliary power supply in substations and power plants
In industrial or substation applications mainly three types of batteries are used namely: Vented / Flooded Lead Acid batteries Sealed maintenance free batteries/Valve Regulated Lead Acid Nickel Cadmium (Ni-cd) batteries For UPS applications batteries are the most popular and hence… Read more
Mar 12, 2012 | By Asif Eqbal
Renewable Energy
Renewable Energy Outlook – Wind Power
With the exception of hydroelectric power, the wind-power industry is far more developed than most other types of renewable energy. Over the past decade, the technology associated with wind power has improved significantly. In addition, wind turbines that generate the… Read more
Mar 10, 2012 | By Edvard Csanyi
Maintenance
Sudden pressure relay in oil-filled power transformer
Internal arcing in an oil-filled power transformer can instantly vaporize surrounding oil, generating gas pressures that can cause catastrophic failure, rupture the tank, and spread flaming oil over a large area. This can damage or destroy other equipment in addition… Read more
Mar 08, 2012 | By Edvard Csanyi
Energy and Power
The real truth behind household power savers
A household power low voltage saving devices has recently received a lot of attention from both consumers and manufacturers. It is generally used in residential homes to save energy and to reduce electricity bills. It is a small device which… Read more
Mar 07, 2012 | By Jignesh Parmar
