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
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
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
Energy and Power
Virus-Powered Battery
Engineers at MIT (Massachusetts Institute of Technology) have figured out a way to deal with virus that is better than just killing them: they’re putting them to work. The researchers… Read more
Sep 16, 2011 | By Bipul Raman
Energy and Power
Ohm’s Law – The Resistance
It is intuitive that voltage and current would be somehow related. For example, if the potential difference between two ends of a wire is increased, we would expect a greater… Read more
Sep 02, 2011 | By Edvard
Energy and Power
How reactive power is helpful to maintain a system healthy
We always in practice to reduce reactive power to improve system efficiency. This are acceptable at some level, if system is purely resistively or capacitance it make cause some problem… Read more
Aug 29, 2011 | By jiguparmar
Energy and Power
Surge arrester types and auxiliary equipment
Nearly 100 years ago, electrode gaps (rod, sphere, or pipe) were used to limit overvoltages on equipment (Sakshaug, 1991). Some of these systems, particularly pipe gaps, may still be in… Read more
Aug 25, 2011 | By Edvard
Energy and Power
How to save electrical energy at home
In our home we use lot of electrical equipment like TV, Freeze, Washing machine, Mp3 player, music system, computer laptop. But we have not adequate knowledge for how to use… Read more
Aug 23, 2011 | By jiguparmar
Energy and Power
Autotransformers in few words
It is possible to obtain transformer action by means of a single coil, provided that there is a “tap connection” somewhere along the winding. Transformers having only one winding are… Read more
Aug 19, 2011 | By Edvard
Energy and Power
Applications and forms of differential relays
Differential relays take a variety of forms, depending on the equipment they protect. The definition of such a relay is “one that operates when the vector difference of two or… Read more
Aug 15, 2011 | By Edvard
Energy and Power
Whole-House Protection Strategy
No single SPD (Surge Protection Strategy) can protect all the equipment in a residence from all causes of electrical surges. Instead, a whole-house protection strategy, consisting of point-of-entry and point-of-use… Read more
Aug 13, 2011 | By Edvard
Energy and Power
Principles for Controlling Harmonics
Harmonic distortion is caused by nonlinear devices in the power system. A nonlinear device is one in which the current is not proportional to the applied voltage. Harmonic distortion is… Read more
Aug 05, 2011 | By Edvard
Energy and Power
DC to AC Transfer – Measurement
General transfer capability is essential to the measurement of voltage, current, power, and energy. The standard cell, the unit of voltage which it preserves, and the unit of current derived… Read more
Jul 30, 2011 | By Edvard
Energy and Power
Resistive heating explained in details
Whenever an electric current flows through a material that has some resistance (i.e., anything but a superconductor), it creates heat. This resistive heating is the result of “friction,” as created… Read more
Jul 27, 2011 | By Edvard
