Energy and Power
Using VLT AQUA Drive in submersible pump application
The system consists of a submersible pump controlled by a Danfoss VLT AQUA Drive and a pressure transmitter. The transmitter gives a 4-20 mA feedback signal to the VLT AQUA… Read more
Jan 30, 2012 | By MarkoCvrkota
High Voltage
Ceramic (Porcelain and Glass) Insulators
Porcelain is the most frequently used material for insulators. Insulators are made of wet, processed porcelain. The fundamental materials used are a mixture of feldspar (35%), china clay (28%), flint… Read more
Jan 27, 2012 | By Edvard
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
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
Cables
EHV/HV Underground Cable Sheath Earthing (part 2/2)
Continued from previous part: EHV/HV Cable Sheath Earthing (part 1/2) Link Box is electrically and mechanically one of the integral accessories of HV underground above ground cable bonding system, associated… Read more
Jan 21, 2012 | By Edvard
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
Cables
EHV/HV Underground Cable Sheath Earthing (part 1/2)
In urban areas, high voltage underground cables are commonly used for the transmission and distribution of electricity. Such high voltage cables have metallic sheaths or screens surrounding the conductors, and/or… Read more
Jan 19, 2012 | By jiguparmar
High Voltage
Segregated Phase Bus System
In this construction all the phases are housed in one metallic enclosure as earlier, but with a metallic barrier between each phase, as illustrated in Figure 1. The metallic barriers provide the required… Read more
Jan 18, 2012 | By Edvard
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
Lighting
Luminous Measurement Graphic Representation
The collection of luminous intensity emitted by a source of light in all directions is known asluminous distribution. The sources of light used in practice have a more or less… Read more
Jan 16, 2012 | By Edvard
Electric Motor
Synchronous Motor Construction
Synchronous motors convert electrical power to mechanical power and synchronous generators convert mechanical power to electrical power; and synchronous condensers supply only reactive power to stabilize system voltages. Synchronous motors, generators, and… Read more
Jan 14, 2012 | By Edvard
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
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
Energy Efficiency
Potential Energy Savings In Utility Buildings Using EIB
Flexibility, utilisation value and energy saving are the three main requirements for utility buildings (administration, office and public buildings, schools, hospitals, etc.). Apart from recouping investment costs, so-called life-cycle costs… Read more
Jan 11, 2012 | By Edvard
Energy and Power
Operation Of Potentially Explosive Installations – The Directive 99/92/EC
In addition to the 94/9/EC Directive, which regulates how explosion protected equipment and protective systems are placed on the market and the design, construction and quality requirements to be met by them, the… Read more
Jan 09, 2012 | By Edvard
