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Archive: Category «Energy and Power»

Capacitor banks in power system (part 1)

When a charge is delivered to a conductor its potential is raised in proportion to the quantity of charge given to it. At a particular potential a conductor can hold a given amount of charge…. Read more

Feb 27, 2012 | Asif Eqbal

Capacitor banks in power system (part 1)

Zero Emission Power Plant, Without Carbon Dioxide

India is the world’s fourth largest economy and has a fast growing energy market. India’s current power capacity is 30% short of demand. Coal and petroleum are the primary sources of energy. High ash content… Read more

Feb 22, 2012 | vinod ramireddy

Zero emission power plant

220V DC system at thermal power station

The 220V DC system supplies direct current as source of operating power for control, signaling, relays, tripping and closing of switchgears, emergency motors of most important auxiliary systems. Under normal conditions of station generation, the… Read more

Feb 15, 2012 | Bipul Raman

220V DC system at thermal power station

Types of neutral earthing in power distribution (part 2)

Resistance grounding has been used in three-phase industrial applications for many years and it resolves many of the problems associated with solidly grounded and ungrounded systems. Resistance Grounding Systems limits the phase-to-ground fault currents. Continued… Read more

Feb 09, 2012 | jiguparmar

Low voltage switchgear - Power distribution

Discussing About LV And HV Electrical Cables

Space is really a critical criterion when discussing electrical cables and wires. In a low-voltage (LV) plastic-sheathed cable with conductor cross-sections of up to 10 mm2 per conductor or in high-voltage (HV) cables (Figure 2),… Read more

Feb 08, 2012 | Edvard

High-voltage cable cross section

About Permeability And Permitivity

The strength of electric field or electrostatic force strength or intensity of field (all synonymous terms) is measured & expressed in terms of force experienced by unit positive charge placed in sphere of influence of… Read more

Feb 01, 2012 | Asif Eqbal

Electric field intensity - closed path denoted by ABCD

Glossary of Medium Voltage Switchgear Terms

This glossary was published originally by Schneider Electric and it is intended to cover the meaning of many common words and phrases used in association with medium voltage switchgear. Many terms will also be applicable… Read more

Jan 25, 2012 | Edvard

Anti Pumping And Lockout Relays

What is ANSI code for Antipumping relay? ANSI codes 94 or even 52 can be used. Relays can be divided into six functional categories shown below: Detect defective lines, defective apparatus, or other dangerous or… Read more

Jan 23, 2012 | Asif Eqbal

Anti-pumping relay - Powell

UK Electrical Industry British Standards (BS)

These standards are the whole of the prescriptions on the basis of which machines, apparatus, materials and the installations should be designed, manufactured and tested so that efficiency and function safety are ensured – and… Read more

Jan 20, 2012 | Edvard

British Standards (BSI)

How lightning really works? (video)

A lightning discharge develops in three stages: first, the collisions between ice particles and water droplets together with gravity separate positive and negative charges inside the thunder cloud and buildup a voltage. Then a discharge… Read more

Jan 17, 2012 | Edvard

What Is The Potential Difference?

Potential difference is the term used to describe how large the electrostatic force is between two charged objects. If a charged body is placed between two objects with a potential difference, the charged body will try to move in one direction, depending upon the… Read more

Jan 13, 2012 | Edvard

Figure 1 - Potential Difference Between Two Charged Objects

Effective Resistance Of Busbars

The construction of busbar is usually carried out by putting together several flat bars in parallel for each phase. The spacing between the bars is made equal to their thickness for practical reasons, and this leads to skin and… Read more

Jan 12, 2012 | Edvard

System with two copper bus bars

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