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Archive: Category «Energy and Power»

Electrical Lectures

Inspection Of Voltage Drop In Conductors

It is part of the inspection process to ensure that installed conductors have been correctly selected for current carrying capacity and voltage drop. To check the suitability of the current… Read more

Apr 15, 2012 | By Edvard

Inspection Of Voltage Drop In Conductors
Electrical Lectures

What is incident energy caused by arc flash?

Incident energy is the energy per unit area received on a surface located a working distance away from the arc flash location. The working distance is the distance from where… Read more

Apr 13, 2012 | By Edvard

Arc flash in switchboard
Energy and Power

Key Cyber Security Purposes for the Smart Grid

In the Smart Grid, there are two key purposes for cyber security: Keep electricity flowing to customers, businesses, and industry. For decades, the power system industry has been developing extensive… Read more

Apr 12, 2012 | By Edvard

Key Cyber Security Purposes for the Smart Grid
Electrical Lectures

Short review of resistance, reactance and impedance

Resistance is essentially friction against the motion of electrons. It is present in all conductors to some extent (except superconductors!), most notably in resistors. When alternating current goes through a… Read more

Apr 08, 2012 | By Edvard

Figure 1 - Perfect resistor, inductor and capacitor
Energy and Power

Single-Phase Power vs Three-Phase Power

The principal elements of an electric power system are the generating stations, the transmission lines, the substations, and the distribution networks. The generators produce the electricity, the transmission lines move… Read more

Apr 01, 2012 | By Edvard

Single-Phase Power vs Three-Phase Power - Differences
Electrical Lectures

Capacitor Banks In Power System (part four)

Continued from technical article: Capacitor Banks In Power System (part three) Let us consider that there is a captive diesel generator the rating of which is specified as 1000kVA and… Read more

Mar 27, 2012 | By Asif Eqbal

Alternator capability curve
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 There are many homes with outdated wiring.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… Read more

Mar 24, 2012 | By Edvard

Electrical installations in home
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… Read more

Mar 21, 2012 | By Edvard

Smart Grid
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,… Read more

Mar 19, 2012 | By Edvard

High-efficiency lead acid batteries

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… Read more

Mar 16, 2012 | By Edvard

System with two copper bus bars
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… Read more

Mar 13, 2012 | By Edvard

Megger Insulation Resistance Test
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… Read more

Mar 07, 2012 | By jiguparmar

Household Power Saver

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