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Power Substation

Complete overview of lightning arresters (part 3)

Continued from article Complete overview of lightning arresters (part 2) There are several types of lightning arresters in general use. They differ only in constructional details but operate on the… Read more

Oct 08, 2011 | By jiguparmar

Complete overview of lighting arresters
Hydropower

What would be the cost of micro hydro plant?

In the examples examined in the five countries, the capital cost13 of micro hydro plants, limited to shaft power, ranged from  US$714 (Nepal, Zimbabwe)  to US$1,233 (Mozambique).  The average cost… Read more

Oct 07, 2011 | By Edvard

The mini-hydro plant in Sitio Campuestohan will provide power for 40 households
Energy and Power

Insulating materials in electrical equipment

The reason for using insulating materials is to separate electrically the conducting parts of equipment from each other and from earthed components. Earthed components may include the mechanical casing or… Read more

Oct 05, 2011 | By Edvard

Press paper /pressboard for Electrical purposes
Energy and Power

Supercapacitor – The future of energy storage

Supercapacitors have been around since 1966 but were never considered as a serious alternative for batteries. Ironically, we could have the said the same for AM radio before Armstrong developed… Read more

Oct 05, 2011 | By Olan

Supercapacitor storage
Energy and Power

Typical Constructions Of Overhead Lines

Along streets, alleys, through woods, and in backyards, many of the distribution lines that feed customers are overhead structures. Because overhead lines are exposed to trees and animals, to wind… Read more

Oct 03, 2011 | By Edvard

Example overhead distribution structures
Power Substation

Complete overview of lightning arresters (part 2)

Continued from article Complete overview of lightning arresters (part 1) Surge arresters are devices that help prevent damage to apparatus due to high voltages. The arrester provides a low-impedance path… Read more

Sep 29, 2011 | By jiguparmar

Complete overview of lighting arresters
Energy Efficiency

Smart Ways to Save Money with Alternative Energy

Alternative energy is currently a hot button topic. Whether your desire to use alternative energy stems from concern for the environment or a desire to create a healthier home, you… Read more

Sep 28, 2011 | By mirha494

Solar Power

How solar collectors works?

Solar energy (solar radiation) is collected by the solar collector’s absorber plates. Selective coatings are often applied to the absorber plates to improve the overall collection efficiency. A thermal fluid… Read more

Sep 26, 2011 | By Edvard

Solar collector
Energy and Power

What is the Static Var Compensator (SVC)?

Static Var Compensator is “a shunt-connected static Var generator or absorber whose output is adjusted to exchange capacitive or inductive current so as to maintain or control specific parameters of… Read more

Sep 25, 2011 | By Edvard

The Siemens Static Var Compensator in the Radsted high-voltage switchgear station
Transformers

Diagnosing Transformer Winding Insulation (video)

This video tutorial shows the progression of power factor or dissipation factor over frequency. Furthermore, measuring transformer winding insulation, including the connection of measuring leads, is explained. Reasons why recording… Read more

Sep 25, 2011 | By Edvard

Cables

Ionization (Corona Discharge) Tests

The ionization test is used primarily for detecting ionization (corona discharge) and slot discharge in generator windings. Both ionization and slot discharge may cause deterioration of insulation. Ionization generally occurs… Read more

Sep 24, 2011 | By Edvard

End winding of generator - Partial discharge
Power Substation

Complete overview of lightning arresters (1)

Lightning can create voltage surges in several of the following ways. Lightning can score a direct hit on your house. It can strike the overhead power line which enters your… Read more

Sep 23, 2011 | By jiguparmar

Complete overview of lighting arresters
Transformers

Understanding Transformer Polarity

With power or distribution transformers, polarity is important only if  the need arises to parallel transformers to gain additional capacity or to  hook up three single-phase transformers to make a… Read more

Sep 23, 2011 | By Edvard

Cables

Understanding Underground Electric Transmission Cables

Underground cables have different technical requirements than overhead lines and have different environmental impacts. Due to their different physical, environmental, and construction needs, underground transmission generally costs more and may… Read more

Sep 21, 2011 | By Bipul Raman

Underground XLPE cables left to right: 345 kV, 138 kV, 69 kV, and distribution


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