Electrical power industry is using current transformers in metering, protective relaying.
n It eases the flow of huge amount of currents, in the presence of high voltages in the circuit in a consistent manner.
n Current Transformers works on the principle of flow of current in the secondary circuit which is perpendicular to the volume of current flowing in its primary circuit. It is primarily a device to measure the current and check the functioning of power grid.
n Use of current transformer is such that it cut offs securely to measure and manage a circuitry from the high voltage available on the circuit. You can control the current transformer by passing a single primary turn under a well-insulated toroidal core with great amount of turns of wire wrapped. Current transformer also can be used to accurately measure the flow of current and identify, monitor the operation power usage. The current transformer is basically defined by its value of current ratio flowing from primary to secondary circuit.
n Factors which affect (improve) the accuracy of current transfers are burden, physical current transformer configuration, rating factor etc.
n Intermediate conductors are reasons for burden in the current calculation circuit and also switch block meters and some of the sources are the conductors among the meter and the current transformer. Outcome for the burden in the current transformer circuit is basically the value of impendence. Presence of high resistance is due to the substation meter being at a level of distance from meter that could beat by using current transformer with 1 amp which produce low voltage drop.
n To ascertain the correct maximum measurable primary current, rating factor of current transformer which are dependent on ambient temperature is used. Usually by multiplying the full load of the current transformer. Rating factor of the current transformer ranges from 35 degree to 55 degree Celsius and to maintain accuracy level with rise of ambient temperature the current transformer would have a low capacity.
n The accuracy of the current transformer is also affected by the physical current transformer configuration. Inaccuracy occurs in a current transformer due to the conductors being not centered in circular or oval.
n In normal conditions, the current transformer is produced in several ways like passing a single primary turn by way of well-insulated toroidal core wrapped with many turns of wire.
n Wideband current transformers are specifically utilized to measure the waveforms of high frequency or pulsed currents within high-pulsed power systems.

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HT Distribution and Power Transformer Design Software
This transformer design software can get you the design parameters along with CAD developed images of different transformer & core assembly parts dynamically. This CAD feature helps you to confirm and check the authenticity of computer generated design parameters. Design oil filled & dry type transformers with one software. More over this software can also be customized as per your requirements.


How does transformer design software work?

1 – Just enter the KVA rating, Impedance, NLL (No Load Losses), LS (Load Losses), select the flux density and press the “Auto mode”. Within seconds you get various design outputs just showing you the core and copper weights depending upon the entered impedance value. Select any set of values as per your preferred tolerance and you get the complete design data of the distribution or power transformer (clearances and certain other values are added as default values but you can change as per your requirements),

2 – Still you have the “Manual” mode to change and fine tune your design as per your requirement (if desired),

3 – Change no. of HV coils/discs per limb, size of HV/LV conductor(s) – both round conductor and strip size, no. of parallel LV conductors,

4 – You can reset various clearances, change current density, conductor insulation as per your requirement and client specifications,

5 – Select HV winding type – Cross Over to Disc winding and vice -a – versa,

6 – Tapping details for OLTC and Off Load Tap Changer upto 25 steps. Enter any + step value through – step @ any % step value,

7 – You get values of Axial and radial forces developed in the windings during short circuits, temp gradients for HV and LV, Thermal Time Constant and ability to withstand shortcircuits with winding temperature rise,

8 – Pressed Steel Radiator (PSR) data calculation added you get automatic fixing dimensions of radiators – section width, CD and no. of fins. Options to select 226, 300 and 560 width sections. Tank drawing details are generated automatically.

9 – Feature added to get winding data for an old transformer

10 – GTP (Guaranteed Technical Particulars), Core details, core & winding assembly details, estimation and costing sheets are generated in the ‘Word Format’ for easy access, printing and sending the same via email to clients for approval, in house departments like design, QC, purchase, estimation, production, despatch. So this distribution and power transformer design software saves time, energy and revenue. A must key tool for transformer design and training professionals and engineering students.


Benefit – Transformer Design Software
This is a key tool for design and training professionals, engineering students. This gives instant results i.e., output parameters such as winding data details, core design, tank design, etc.,. for a very few input values. Even a change in one input value can change the values of all output design parameters, so fast study and results are possible with this transformer design software. You can prepare design sheets for a range of ratings and specifications and study the same to finalize one with best results. This helps you in deciding to select a design for high efficiency and low losse. Design sheets can be sent to various in house departments for study, reference and approvals. If a design engineer requires the design sheet to study the various parametres of a transformer then a purchage engineer will reguire the same design sheet with bill of materials for procurement of raw material to manufacture the transformer. A production engineer will require the same design sheet to get ready to manufacture the subject transformer in his/her plant and set the available resources and working staff to best utilise them. Engineering professionals and engineering students will requier this software as an latest study material and tool for them to easily and quickly undersand the transformer design process.


This software is developed for the engineers with an aim to get high productivity and easy to learn features, with full documentation that includes extensive information on machine theory and design. Machine design with this simulation is interactive and fast. However, this software does not do the engineer’s job. It is simply a specialized calculating tool to assist the design engineers with initial sizing and preliminary design of a transformer by providing a simple intuitive interface and quick simulation.

Softbit provides CAD/CAM software packages for Electrical Machine Design, Industrial Automation products such as Remote Data Logger. Company aims to satisfy the current and future needs of its valued clients. We strive for customer’s satisfaction; our aim is technology dedication & continual improvements. http://www.softbitonline.com/ <a href="http://www.softbitonline.com/"<ac electric motor</a<

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Good News For PSP Owners! Here’s How To Download Cheap PSP Games!

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by Nevets Notrom

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If you own a PSP chances are that you know that there is the ability to download movies, music and games to use on this awesome game system. This is one of the best ways to make sure you are never bored and have a stock of the newest games on your PSP. A question that is asked all the time is “How do I download games onto my PSP?”

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There are a couple of options for this so let’s take a closer look into it shall we?

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The first thing you should remember when looking for downloadable games is that you get what you pay for. This is especially true for sites that say they offer free games, movies, music and more for PSPs. Free sites usually give you a lot more than free downloads and I don’t mean that as a good thing. You will find that many games, movies and music come with viruses and spyware attached.

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Because the websites do not make a profit from their users they get the downloads for random people that also use their site. These downloads are not official PSP downloads and are more than likely corrupt, meaning they will not play at all or work right. Downloads are usually very slow and like I said before, they could be loaded with viruses and spyware.

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As I’m sure you can tell, I’m not a fan of these so-called free PSP download sites. They can harm your computer, waste your time and cause a lot of headaches.

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A much better way to find PSP downloads is to look for a specialty PSP download membership website. There are websites that will let you download unlimited PSP games, movies and music when you sign-up as a member of these sites.

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It’s a little surprising that more people aren’t using these site, but I think many PSP users just don’t know they exist. It’s a great value – for less than the cost of one game you can get unlimited access to as many game downloads as you want.

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The best paid sites are the ones that only charge the one time fee. For a small fee of $30 to $50 you will be able to download whatever you want without ever having to spend another dime. By choosing sites like these you are ensured that you are downloading from reputable businesses. These businesses work hard to make sure their downloads work, download quickly and are virus and spyware free.

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One of the best features of the PSP is the ability to download games, movies and music instead of having to but them at the stores. Not only will it save you a lot of money in the long-run, but you will als be sure your PSP is fully stocked with the newest games without ever having to make a trip to the store. Happy gaming!

Nevets Notrom is an avid video games addict as well as mobie buff and bookworm.nHe is also a great lover of art and the outdoors. Please enjoy his article!nnn<a href="http://www.psp2auctions.com//"<PSP Cheap<nn/a<nn <a href="http://www.psp2auctions.com/PSP-Cheap%nn20/cheappspgames"<Cheap PSP Games</a<nn <a href="http://www.psp2auctions.com/PSP-Cheap%nn20/CheapPSPMemorySticks"<Cheap PSP Memory Sticks</nna<n

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We wonder sometimes, how a weighing scale makes a difference in macro-environment.
n Day in day out organizations use this wonderful scientific device to find out the weight of their products, assets, items, supplies for different business needs. Lately everyone of us has realized that weight is a key element to end results and it needs to be measured precisely.
n Achieving accurate results in weight is not a rocket science. Advanced electronic weighing scales fill the gap perfectly. For your purchase and carriage now you can use weighing scales and depend on them without any doubts. With different sizes, capacity, and features you have a better choice for your requirement.
n Different weighing scales are available now from manufactures, broadly a few of them are : bench scales, digital scales, platform scales, crane scales, electronic scales, counting scales, table top scales, jewellery weighing scales, pocket scales, postal scales, hanging scales, weighbridge etc. All the weighing scales come with accurate counting of the objects.
n A truck can be weighed with our without load or any object can be weighed by putting the object on the weighing scale.
n Due to continuous innovation in weighing scales, automated features of "switch off," loading batteries, indicators, and counting buttons are found in all the weighing scales.
n Weighing scales are now dominating the world due to its extensive usage. It is extremely easy to identify the suppliers and buy a weighing scale of your choice. From business community to individual user weighing scales with different models, price, size and load capacity fulfill the basic need of weighing perfectly.
nAs a customer be informed that a weighing scale needs to be certified legally and the quality is as per international standards (ISO). World wise use has led to weighing scales being the best scales in the world.

For More Information Visit: – <a href=" http://www.atcomaart.com/articles/packaging-shipping-products/Retail-Businesses-solutions-Label-Printers-are-they-the-best-fit.aspx"<www.atcomaart.com/</a< now!nn

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As you look at the different prepaid cell phone plans which use the prepaid facility you should research the various prepaid phone plans which have been provided. To get the most out of this research you should look at well known and lesser known brands. This way you will have a wide information base to look at for prepaid cell phone plans.

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You will find that using prepaid cell phone plans is a great idea if you are living on a strict budget which does not allow for the use of unlimited phone usage. With these prepaid cell phone plans you can look at the different prepaid phone plans to find one that is perfect for you. Some of the cell phone manufacturers have different types of packages for you to use.

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In some of these prepaid cell phone plans you will have a large amount of talking time provided to you. You will however need to purchase more airtime if you go over the given amount of talking time. There are other prepaid cell phone plans where you will be provided with extra minutes — talk time- during weekends.

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There is another aspect to using prepaid cell phone plans that you might want to consider. This is the long term money saving capabilities of the prepaid phone that you are using. To unravel this mess you need to understand that while these prepaid plans are ideal for people who don’t use their phones a lot, the trouble starts when you have to buy more air time.

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What this means is that with these various prepaid cell phone plans you can see the best way to save your money. Currently the well known prepaid cell phone plan providers are Nextel, Alltel, Boost, Sprint, and others.

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As each of these prepaid cell phone plans are all different you should look at the different benefits that can be found in using a prepaid phone. You should also make sure that you understand the various disadvantages which come with the continued use of these prepaid cell phone plans.

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In this manner you can see if you will be getting the full value for your money with these different prepaid cell phone plans. When you are using one of these prepaid phones you will find that as long as the prepaid card lasts you have the ability to talk to whomever you want.

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As a result of this necessity you will find that hunting for the best prepaid cell phone plans is a prefect good way to save you some money and hassle. The various prepaid cell phone plans that you will find are the perfect answer to your phone bills.

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My wife and I take hundreds of pictures of our daughter. If you are like us then those pictures are safely squirreled away on our computer. Some pictures you take to look at in the future. Some pictures you take just to record something. But, having those hundreds of pictures digitized on your computer is rather useless. That is unless you put them on a CD and take them to the local photo shop and make prints of them.nnPrinting pictures at the local photo shop can be really expensive. But, if you print your pictures at home with your home printer, you run the risk that the prints may not be as nice as you would like. Now you could buy an expensive printer design to print photos. These printers can cost from several hundred dollars to several thousand dollars. Not to mention the cost of the special ink and the special paper. If you print pictures, then the cost of ink and paper could run you several hundred dollars a year.nnOnce you have made the investment into a great photo ready printer and the necessary ink and paper that does not mean that the pictures will always come out nice. Moreover, printed pictures tend to fade over time and can be easily damaged from handling. The older those pictures get the easier it is to damage them. Until, eventually you will have to put them away for safe keeping. At that point those pictures you made such big investment in become nearly useless out of site not seen by anyone.nnFor now let’s not look at the fact that pictures fade and are fragile. What about when you want to change the pictures that decorate the walls in your house. I don’t know about you but my grand parents filled the walls of the hallways and staircases in their house with pictures of family, friends, and events throughout their life. There were probably hundreds of pictures along these walls. Could you imagine trying to changes these pictures out on the spur of the moment; or on a seasonal basis? That would be a huge task.nnModern technology has solved this problem and enabled you to share your memories forever without worry. Digital picture frames are the future of photography. Digital picture frames allow you to showcase your pictures without worrying about loosing them or damaging them.nnDigital picture frames allow you to easily and conveniently change the pictures on your walls. Whether you want to change the pictures because of the change of season, or change them because your in-laws are coming over, digital picture frames enable you to change them easily and fast. nnWith digital picture frames you can change all of the pictures in your house from as easily as changing the channel on your television. You can do it all from the comfort of your computer. Most but not all frames have on board memory that allows you to load several pictures at a time. You can change these pictures at will by using either a remote control or the convenient buttons on the frame itself. Many frames allow you to load pictures into the frames from either an SD card, USB disk, or even wirelessly. Wireless digital picture frames are the most convenient as the allow you to change all of the pictures in your house from the nice cushy chair in front of your computer. Digital picture frames are the future of photography.

John Tasher writes on a wide variety of subjects. If you are looking for <a href="2020foto.com"<Digital Frames For Sale</a<,or a <a href="http://2020foto.com"< Cheap Digital Picture Frames</a< or <a href="http://2020foto.com"<Discount Digital Picture Frames</a<, then visit his site 2020Foto.com

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Ever since I was 11 years old, I always wanted to own a camera. The art of photography fascinated me and held various challenges that I knew could be overcome if given the right tools and opportunity.
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nWhen I was 11 years old, film was king. It was also the age of the platform shoes and the afro hair style, so you can imagine my joy when I took my first picture — using black and white film.
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nMy progression into color photography was slow. I liken this to the time it takes a tortoise to complete a sprint of the 100M. Suffice it to say that the tortoise and I have many things in common but unlike the hard shell of the tortoise that can protect them from the elements I was subjected to all the turmoil life had to offer without much protection.
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nThe Canon A1 was the first camera I owned, and this launched a series of

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TV tuners permit a consumer to watch TV on the computer screen. There are a lot of different kinds of TV tuners. The most ordinary category of TV tuner for a system is the USB TV tuner. USB ports are common on every computer, thus this sort of connectivity make it probable to join the tuner to attractive much any system. The TV tuner work just like a usual TV would but with require for a huge aerial. USB TV tuners can collect average clarity, or high quality clarity signs depending upon the kind of tuner you are using.nnMost of the TV tuners are attached with some kind of software. This software permits the user to trace the streaming TV into their systems, so they can enjoy serials at a afterward time. In many cases, this software is simple to use & simply installed. These tuners have a lot of distinct features for such a moveable tuner & can be accessible with almost everywhere.nnThe tuner is quite defined. It tunes very intimately & is much easy to handle, so you can simply tell if you have tuned properly or not. One enormous thing is that it is so transportable. You can simply take it into your pouch. This is really a very convenient gadget that you can take it anyplace & all over you would like. TV tuners are regularly developing. The most recent flourish of TV tuners permits the customers to use two streams from the single tuner. It means that you can save one TV show during enjoying another T show. This is very suitable but currently, only just one stream can be saved & the saved stream can not be viewable in combination with the not saved stream.nnTV tuners are a enormous technique to enjoy TV on small computers. With the chances of notebook systems, enjoying TV anyplace your small notebook system can go is feasible. TV tuners can be purchases for unusual costs depending upon the quality & features of the manufactured goods & the software they present. A common TV tuner can be purchased for about 50$ while a more luxurious substitute with additional wide-ranging software will cost more that 100$. With convenience becoming more & more of a question with present users, a USB TV tuner is a immense answer for enjoying TV from your computer system.

Welcome to our Review Guide for PC online TV. We've done extensive research on TV for PC products from around the web and have selected what we believe to be the Top 3 choices based on price, usability, quality, and best bang for your buck. Our mission is to become #1 website for <a href="http://www.tvforpcreview.com" target="_blank"<TV on PC reviews</a< and <a href="http://www.tvforpcreview.com" target="_blank"<live TV PC</a< searches.

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Palm is on high with its stunning creation, named Palm Treo Pro. Those who are looking for a full-featured Windows Mobile smart phone should mull over the Palm Treo Pro. It has business class look, along with extraordinary features. nnPalm Treo Pro has a chic look, beautiful creation and a flamboyant handset with all the latest technology. This astonishing handset comes with the eye-catching shining piano-black case; its glossy, rounded corner appears almost being the same as Apple’s favorite smartphone.nnThere is a 2-megapixel camera on the back of the device. A mute switch button on the top of the Palm Treo Pro facilitates you to quickly switch on to silent mode while watching movies or during meetings The Treo Pro features standard navigation with a five-way navigation key, dual-input and selection buttons. It is also equipped with the touch screen facility with its finger-friendly shortcuts to commonly used procedures.nnPalm Treo Pro is compatible with the window mobile phone that makes the work easier. While other window mobile phones test our tolerance, and complicated to operate. The same is not with the Palm Treo Pro, it is easier to use, the execution of program is fast and accessing the menus is easy. The Treo Pro’s 400MHz Qualcomm processor is proficient of multitasking. Like many other phone there is also a 3.5mm headphone jack at the base of this smart phone that enable the user to get a versatile media player as well.nnThe Palm Treo Pro gets easily connected to the office intranet without much pesters. This smart phone handles itself easily, to the basic calling and messaging, including e-mail. Its inbuilt speaker is crystal clear and almost too clamorous to hear. The Palm Treo Pro keyboard is suitable for any business transactionnnFeatures of Palm Treo Pro:nn

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The mobile phone (also called a mobile, wireless, cellular phone, cell phone, or hand phone(hp)) is a short-range, portable electronic device used for mobile voice or data communication over a network of specialized base stations known as cell sites. In addition to the standard voice function of a telephone, current mobile phones may support many additional services, and accessories, such as SMS for text messaging, email, packet switching for access to the Internet,java gaming, bluetooth, infared, camera with video recorder and MMS for sending and receiving photos and video.

Most current mobile phones connect to a cellular network of base stations (cell sites), which is in turn interconnected to the public switched telephone network (PSTN) (the exception is satellite phones). Since the mid-2000s, an increasing number of cellphones can connect to the Internet, a portion of which can be navigated using cellphones.

Millions of people in the United States and around the world use cellular phones. They are such great gadgets — with a cell phone, you can talk to anyone on the planet from just about anywhere! These days, cell phones provide an incredible array of functions, and new ones are being added at a breakneck pace. Depending on the cell-phone model, you can:

Store contact information, make task or to-do lists, keep track of appointments and set reminders, use the built-in calculator for simple math, send or receive e-mail, get information (news, entertainment, stock quotes) from the Internet, play games, watch TV, send text messages and integrate other devices such as PDAs, MP3 players and GPS receivers. Mobile phones send and receive radio signals with any number of cell site base stations fitted with microwave antennas.

These sites are usually mounted on a tower, pole or building, located throughout populated areas, then connected to a cabled communication network and switching system. The phones have a low-power transceiver that transmits voice and data to the nearest cell sites, normally not more than 8 to 13 km (approximately 5 to 8 miles) away.

When the mobile phone or data device is turned on, it registers with the mobile telephone exchange, or switch, with its unique identifiers, and will then be alerted by the mobile switch when there is an incoming telephone call. The handset constantly listens for the strongest signal being received from the surrounding base stations.

As the user moves around the network, the mobile device will “handoff” to various cell sites during calls, or while waiting (idle) between calls it will reselect cell sites. Cell sites have relatively low-power (often only one or two watts) radio transmitters which broadcast their presence and relay communications between the mobile handsets and the switch.

The switch in turn connects the call to another subscriber of the same wireless service provider or to the public telephone network, which includes the networks of other wireless carriers. Many of these sites are camouflaged to blend with existing environments, particularly in scenic areas.

 The dialogue between the handset and the cell site is a stream of digital data that includes digitized audio (except for the first generation analog networks). The technology that achieves this depends on the system which the mobile phone operator has adopted.

The technologies are grouped by generation. The first-generation systems started in 1979 with Japan, are all analog and include AMPS and NMT. Second-generation systems, started in 1991 in Finland, are all digital and include GSM, CDMA and TDMA. Reference: http://en.wikipedia.org/wiki/Cellphones

Steve works for FRCD a <a href="http://www.free-reverse-cell-phone-directory.com"<cell phone numbers</a< directory where you can search and lookup cell phone numbers. This cell phone numbers directory website also has a reverse <a href="http://www.free-reverse-cell-phone-directory.com"<cell phone numbers lookup</a<.

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