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
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
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
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
Cables
How to locate underground faults on cable?
A common approach to test cable and determine insulation integrity is to use a Hi-pot test. In a hi-pot test, a DC voltage is applied for 5 to 15 min…. Read more
Oct 04, 2011 | By Edvard
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
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
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
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
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
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
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
