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Archive: Category «Energy and Power»

Energy and Power

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… Read more

Feb 15, 2012 | By Bipul Raman

220V DC system at thermal power station
Electrical Lectures

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… Read more

Feb 09, 2012 | By jiguparmar

Low voltage switchgear - Power distribution
Cables

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… Read more

Feb 08, 2012 | By Edvard Csanyi

High-voltage cable cross section
Electrical Lectures

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… Read more

Feb 01, 2012 | By Asif Eqbal

Electric field intensity - closed path denoted by ABCD
Energy and Power

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… Read more

Jan 25, 2012 | By Edvard Csanyi

Energy and Power

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… Read more

Jan 23, 2012 | By Asif Eqbal

Anti-pumping relay - Powell
Energy and Power

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… Read more

Jan 20, 2012 | By Edvard Csanyi

British Standards (BSI)
Energy and Power

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… Read more

Jan 17, 2012 | By Edvard Csanyi

Electrical Lectures

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… Read more

Jan 13, 2012 | By Edvard Csanyi

Figure 1 - Potential Difference Between Two Charged Objects
Energy and Power

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… Read more

Jan 12, 2012 | By Edvard Csanyi

System with two copper bus bars
Energy and Power

The Need for Breaker Failure Protection

Circuit breakers are strategically located in power systems to connect circuits and electrical apparatus. Circuit breakers are commanded to open and close by protection and control systems that monitor conditions… Read more

Jan 01, 2012 | By Edvard Csanyi

Eaton - Magnum circuit breaker


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