The Engineering Toolbox

The Engineering Toolbox is a nice place for Electrical and other engineers for a quick reference into complicated equations and formulae. Visit this site at http://www.engineeringtoolbox.com/ and book mark the same for your future reference. You caqn even sign up for some useful free industry publications from here.

Electrical engineering Community

Electrical engineering Community is a forum you must visit and register. This forum helps Electrical installation & energy management Sharing technical & practical tips to build an optimum energy system for today and tomorrow. You will find discussions on day to day subjects on Electrical Engineering. I am a daily visitor of this site. Please follow the link below:

engineering.electrical-equipment.org/

Free PDF Electrical Books for Download

The Marine Electrical & Electronics Bible - download at 4shared. The Marine Electrical & Electronics Bible is hosted at free file sharing service 4shared.The book has 388 pages. This is only part of it ,126 pages are available for download.Try this and comment. If you some other sites that offer such free downloads please use the comment column to communicate it with our readers.

Electronics - Theory and Design of Electrical and Electronic Circuits - download at 4shared. Electronics - Theory and Design of Electrical and Electronic Circuits is hosted at free file sharing service 4shared.Its a great site with a great stuff.I suggest everyone to try this sites's stuff.Free doesnt meen that the content is substandard. If you some other sites that offer such free downloads please use the comment column to communicate it with our readers. 

Aluminum Conductor Composite Reinforced (ACCR)

Aluminum Conductor Composite Reinforced (ACCR) is a rather new comer to towerline power transmission technology. ACCR can deliver 2 to 3 times the capacity without the risks and delays of major construction projects. On time, in budget, back to service – with proven reliability. Aluminum Conductor Composite Reinforced (ACCR) is overhead transmission conductor like ACSR and ACSS, with higher ampere capacity with less thermal expansion (sag). ACCR can carry two or more times the current of a standard conductor of comparable diameter. It has less weight and sag, but the same strength and can be installed to meet your tension and clearance requirements. This allows you to maximize the capacity of your transmission upgrade using existing structures and rights of way. Compared to a rebuild project, you can get your upgrade done faster and with fewer permitting requirements. ACCR can be used any place standard ACSR conductor. ACCR's core is aluminum-based, rather than steel, it is more conductive than steel core conductors, resulting in lower losses under the same operating conditions. In addition, 3M ACCR comes in a trapezoidal wire design that can improve conductivity up to 28% compared to the same size, round wire ACSR. ACCR Conductors cost around 4 times of the standard conductors. See how easy ACCR is to install by viewing the Installation videos. Click the link below to view the Installation Equipment, Procedures and Hardware videos, as seen at IEEE PES 2008. Installation Equipment, Procedures and Hardware Videos

Latest Design and Engineering software for Engineers

The technology is changing at lightning speed. Now engineers around the world are using latest softwares for design and simulation purpose. Electrical, Civil, Mechanical, Electronic, Production, Protection and Transmission Line Design Engineers can use the latest software. Now see the list of latest software and their use.

ETAP: Calculation related to system fault, short circuit, power flow, current supply, derating factor, earthing system and voltage drop.

CYMCAP: Power cable ampacity calculation per IEC – 60287.

ASPEN: Overhead transmission line and underground cable impedance calculation.

CDEGS: Substation grounding design & Analysis per IEEE-80.

PLS-CADD:A comprehensive program for structural and geometric design of overhead lines including terrain modeling, route selection, manual or automatic minimum cost evaluation, sag tension, clearance, string charts, strength charts, material list generation ‘plan and profile’ drafting.

ALCOA SAG 10:Calculation related to Conductor Sag & Tension, Mechanical load and stresses etc.

STAAD/Pro:A widely accepted general purpose structural analysis and design program for geometric modeling of 2D & 3D frame trusses, plates and various other surfaces which can be generated graphically and with features to generate various kinds of loadings and to perform RCC design, structural steel design, supporting provisions of various international codes.

PLS-TOWER:Complete, integrated computer program for the analysis of Steel Latticed Towers, Communication Towers and Substation Steel Structures.

PLS-POLE:Design of steel monopoles.

PLS-FOOTING:Design of spread footing foundations for Transmission Line towers and substation steel structures foundations.

CAISSON:Design of moment resisting concrete pier foundations for Transmission Line monopoles, small base Substation towers and equipment support structure foundations

ATP (Alternate Transient Program): Insulation coordination study.

SHAFT V.5: Design of axially loaded drilled shafts.

News Trends in High Voltage Transmisison Line Towers Design

Sea this High Voltage Transmission Line Towers designed for Iceland. This tower is prefabricated and erected on concrete structure. Watch the different views. Also read the article titled at High Voltage Transmission Line Towers by Arphenotype! Shre your ideas and participate in the discussions!

Electrical System Protection

Electrical System Protection is a very important field of study. Most of the design engineers find it difficult to protect their equipments from voltage surges, power breakers, fluctuations etc. There are several standard projections used for electrical power systems. The basic protection systems are Overload Protection, Under voltage Protection, Overvoltage Protection, Phase Failure Protection, Phase Sequence Reversal Protection. The first one that is Overload or over current protection is sufficient for majority or equipments. A simple schematic is given in the figure. This is a basic circuit that trigger an opening solenoid and protect the system from overloads. Now you take any circuit around you and make a schematic of the same. Your schematic will look very same as this figure!

Symbols, Units, Abbreviations, and Acronyms

Symbols, Units, Abbreviations, and Acronyms

A.C., a.c.	alternating current
AM	amplitude modulation
D.C., d.c.	direct current
emf	electromotive force
FM	frequency modulation
hp	horse power
Hz	Hertz, unit of frequency
kV	Kilovolt, 1000 volts
kVA	kilovolt-ampere
kW	Kilowatt, 1000 watts
kWh	kilowatt-hour
MVA	megavolt ampere
MVAR	megavolt-ampere reactive
mmf	magnetomotive force
MRI	magnetic resonance imaging
rms	root mean squared
rpm	revolutions per minute
rps	revolutions per second
SCADA	supervisory control and data acquisition
SF6	sulfur hexafluriode
VA	volt-ampere
VAR	volt-ampere reactive

Cummins Power Generation

I have started my carrier in 1990 and I was deputed to attend panel installations on ships. Most of the equipments were new to me and they work rarely. During commissioning time one thing that helped me a lot is Cummins Generators. They all worked well and poise no problem for me as a service engineer. Cummins Power Generation, a subsidiary of Cummins Inc. is a global leader dedicated to increasing the availability and reliability of electric power around the world. With more than 80 years’ experience, its global distributor network delivers innovative solutions for any power need — commercial, industrial, recreational, emergency and residential. Products include alternators, generator-drive engines and pre-integrated power systems, combining generator sets and power control and transfer technologies. Services range from system design, project management, financing, and operation and maintenance contracts to development of turnkey power plants. Visit Cummins Power Generation Page : http://www.facebook.com/group.php?gid=55025715009 Cummins Power Generation has a Channel in YouTube? Become a subscriber and receive all the latest videos and multimedia news. http://www.youtube.com/cumminspowergen

Recommended Practice for Electrical Equipment Maintenance, 2010 Edition

Prevent costly equipment failures and worker injuries with the latest rules in the 2010 NFPA 70B.

NFPA 70B: Recommended Practice for Electrical Equipment Maintenance helps you develop and carry out an Electrical Preventive Maintenance (EPM) program for all types of equipment and assemblies.

Changes in the 2010 edition include:

* Reorganization of document, including grouping of related topics plus consolidation of testing information
* New material on emergency preparedness and electrical system and equipment restoration
* New recommendations on how to conduct outsourcing of electrical equipment maintenance
* New information on failure modes effects and criticality analysis (FMECA)

Order your copy at http://www.maintenanceresources.com/bookstore/electrical/nfpa-10.htm

5 Important words on electricity

5 Important words on electricity and definitions!

1. Electric charge – a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields.
2. Electric current – a movement or flow of electrically charged particles, typically measured in amperes.
3. Electric field – an influence produced by an electric charge on other charges in its vicinity.
4. Electric potential – the capacity of an electric field to do work on an electric charge, typically measured involts.
5. Electromagnetism – a fundamental interaction between the magnetic field and the presence and motion of an electric charge.

Electrifying Caption Contest from Havells

Havells India Ltd. announced an Electrifying Caption Contest on Facebook. This is a golden opportunity for the Electrical Engineers and consumers. Havells India Ltd. is a billion-dollar-plus organization, and is one of the largest & India's fastest growing electrical and power distribution equipment manufacturer. Havells India Ltd. is a billion-dollar-plus organization, and is one of the largest & India's fastest growing electrical and power distribution equipment manufacturer with products ranging from Industrial & Domestic Circuit Protection Switchgear, Cables & Wires, Motors, Fans, Power Capacitors, CFL Lamps, Luminaires for Domestic, Commercial & Industrial applications, Modular Switches, & Bathfittings covering the entire gamut of household, commercial and industrial electrical needs.

You just visit the havells Page and like it!

http://www.facebook.com/Havells#!/Havells?v=info

Read Havells Tips like this - Select the most energy-efficient models when you replace your old appliances. Look for the Energy Star Label - your assurance that the product saves energy & prevents pollution.Buy the product that is sized to your typical needs - not the biggest one available. Replacing a typical 1973 refrigerator with a new energy-efficient model, saves 1.4 tons of CO2 per year.