220 to 110 converter

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The black-fuselaged, red-winged 1929 Warren Disbrow New Standard D-25, registered N19157, appeared over the trees as it was elevator-trimmed on to its final approach toward the rolling grass field of Old Rhinebeck Aerodrome, momentarily disappearing as it flared behind the hill and ultimately reappearing at the top of it with its conventional undercarriage now firmly ground-based. This was how America had been introduced to flying during the 1920s barnstorming days; it would certainly be the way I would be introduced to it–in an open-cockpit biplane. Paradoxically, the aircraft would do more than aerially transport me: it would “transport” me back in time.

Designed by Charles Healy Day as a successor to his earlier GD-24 series airframe, the D-25 had been built by three different aircraft manufacturers, each struggling to combat poor economic conditions, before finally being produced by the New Standard Airplane Company of Patterson, New Jersey, in 1929. Originally powered by the 220-hp Wright Whirlwind J-5 piston engine-which had also powered Lindbergh’s Spirit of St. Louis-aircraft N19157 featured the equally-horsepowered, eight-cylinder, dual-bladed, uncowled Continental radial engine. The 45-foot upper wing sported trailing edge ailerons which, angled toward the tips, progressively increased in area. The open, single-pilot cockpit, positioned behind the two-bench, four- to five-passenger cabin box, was equipped with a stick, rudder pedals, and a sparse instrument panel: an airspeed indicator (calibrated in mph), an altimeter, a compass, an oil pressure gauge, an oil temperature gauge, a turn-and-bank indicator, and an engine starter. The current steerable rubber tailwheel replaced the design’s original tailskid.

The Rhinebeck aircraft, with a 2,010-pound empty weight, featured a 1,400-pound payload capability comprised of the single pilot, four passengers, and 64 gallons of fuel.

The 55 D-25s produced were intended for the same purpose as N19157 would serve today-the exchange of revenue for rides-which, upon reflection, was the very definition of the word “barnstorming.”

A single wooden step, the era’s equivalent to a “jet bridge,” led me on to the wing root and over the side into the enclosed–(I slipped on this adjective)–open cabin into the present-day equivalent of seat 2A, a nonsmoking, smoking, element-exposed window seat whose view encompassed as much as the passenger ventured to take in. The spartan “cabin” consisted only of the two previously mentioned bench seats and the wooden, chest-high half-sides and floor. I guess the sheer novelty of conquering lift for any amount of time far outweighed the importance of comfort. That would eventually take its place in the line of priorities.

The two wheels rode the hill’s inclines remarkably well. Assuming an almost deafening sputter, the uncowled, 220-hp Continental engine propelled the D-25 into its wind-generating acceleration roll over the sloping ground. In an almost simultaneous deflection, the aircraft gently lifted its tail wheel off the ground and surrendered its dual, fabric-covered wings to the sky. Bitten by the stinging, slipstream-produced October wind whose force almost inhibited respiration, and periodically needled by the engine-spit castor oil, I immediately ascertained what those enclosed-cabined aircraft were protecting me from. As the D-25 crossed over the runway perpendicular to its take off direction, a yellow-winged Waco biplane gently flexed skyward, completing the illusionary time capsule. Was a void from the biplane era really trapped in the present day and did anyone know about it? I had wondered.

The ground, camouflaged by a dense pattern of orange, yellow, and red autumn-transformed trees, was otherwise devoid of contemporary civilization. Accelerating between 70 and 80 mph, as registered by the port wing wire brace strut-installed, onrushing wind actuated-airspeed indicator, the biplane surmounted the silver surface of the Hudson River.

An old codger, sharing the same aft bench and seatbelt as I and demonstrating great familiarity with his goggles and the aircraft, sat across from me in “2B.” The stories you could probably relate about this era, I thought. I garnered a new-found understanding and respect for the aviation pioneers who had braved the deafening engine emissions and bitter winds in the black night skies with nary an instrument or navigation aid to guide them as they delivered the US mail. Everyone should step into the other person’s shoes before he attempts a judgment.

Rudder-induced into a left bank toward the aerodrome, the D-25, now side-slipped into an almost vertical, but controlled descent toward the white “X” marking its threshold, flared and settled on to the hill at a power-reduced 50-mph, its two main wheels absorbing the alight and brief deceleration. Taxiing down two-thirds of the grass strip, the still-sputtering, quad-passenger biplane swung round to the right with the aid of its tail wheel and ceased movement at the “Biplane Rides” booth, where another group of four eagerly awaited their flight.

Removing goggles and climbing out over the wing of the propeller-spinning aircraft, I stepped back on to the ground…and into 1995.

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What is an LCD Display?

LCD is short for liquid crystal display, and while LCD technology has been around for quite some time, it has been only in the last decade or so that the technology became suitable for the high quality flat panel television and computer monitor displays we see today. The most notable feature of displays using LCD technology, of course, is the thinness of the unit, but the power behind that thin design is actually quite extensive.

The display on an LCD panel is comprised of picture elements, or pixels as they are known to computer geeks everywhere. The resolution the flat panel display is capable of is determined partially by how many pixels are contained in the display. A typical LCD panel display can range from hundreds of thousands of pixels to millions of pixels, and the higher the number of pixels the better the resolution will be. LCD televisions come in a number of different shapes and sizes, but they are typically designed to accommodate a 16 to 9 display ratio. This ratio makes them perfect for watching widescreen displays like DVDs, as well as traditional television shows.

What are the Differences between LCD and Traditional TVs?

LCD televisions, flat panel computer monitors and other devices have a number of built in advantages, and it is these advantages that have made them such a hit with technology buyers everywhere. Some of the many advantages of LCD technology include:

*Brighter display – the displays on LCD televisions are brighter than those on a traditional CRT television, due to the special way these displays work. While a traditional CRT television or monitor uses a tube to create the display, the LCT TV uses pixels, providing for a brighter display.

*Flicker free performance – the display of the LCD television or computer monitor will also be free of flicker, since the LCD display will have a constant source of light throughout the entire screen. Once the pixel is turned on it remains on. Contrast this to the design of the CRT television or monitor, which must refresh the screen periodically with a ray of light moving down the monitor or TV.

*Low power consumption – another big advantage of the LCD TV is its superior energy efficiency. LCD televisions will be up to 65% more energy efficient than traditional televisions, helping to protect the environment while saving you money.

*Ultra slim design – it is of course the thin and sleek design that turns heads and gets the attention of buyers. LCD displays can be as thin as 49mm (just over 19 inches), meaning that these TVs can be placed virtually anywhere.

*Wall mountable designs – Many LCD TVs are so thin that they can be hung on the wall as you would hang a picture. It is important of course to purchase a wall mounting bracket that is suitable for holding the weight of the unit.

A Guide to Some LCD TV Terms

If you are in the market for an LCD TV, you will likely hear a number of new, and sometimes confusing, terms bandied about. It is important to understand what these words mean to you, the television technology shopper.

*Aspect Ratio – the aspect ratio of the TV helps to determine its suitability for watching movies and television programming in true widescreen format. While the traditional television has always used a aspect ratio of 4:3, i.e. 4″ wide, 3″ high, the typical LCD television uses an aspect ratio of 16:9, providing a truer widescreen picture perfect for watching DVD and VHS movies, as well as traditional television programming.

*Candela – one of those words you may hear from time to time is candela. Put simply, the candela is a standard unit of brightness, and it is equivalent to the number of candles that would be required to produce the same intensity of light. Therefore a rating such as 450 cd/m2 means that it would take a concentration of 450 candles in a square meter area to produce the same amount of light.

*Contrast Ratio – the contrast ratio is simply the difference in intensity of light between the darkest black and the brightest white on the display. The higher the contrast ratio the sharper and cleaner the picture will be.

*HDTV – high definition television, or HDTV for short, is quickly becoming the standard for television signal technology, and it is important to look for an LCD TV that is HDTV ready.

*Inputs – the TV inputs are important if you plant to connect a DVD player, VCR, game console, computer or other device to the LCD display panel. There are many different types of inputs, and it is important that the TV you choose provide a number of different options for getting signals to the device. A TV with a great many inputs will allow you to connect a number of different devices to the TV, greatly enhancing its versatility and its value.

It is also important to make sure that LCD TV you choose has the proper tuner for playing the TV signal you have coming in to the house. Many plasma screen and LCD TVs will lack a built in tuner, meaning that they will need to pick up that television signal from a cable box, satellite TV box, DirectTV signal or other similar device. It is important to make sure you understand the type of tuner that comes with the TV you are considering, and it is important to purchase all the accessories you will need when buying the TV.

Speaking of accessories, it is important to buy only the highest quality component cabling to connect that LCD display to your DVD player, VCR, Laser Disk player, computer or other device. The highest quality cables will provide the best picture and sound quality, which will further enhance the display of the LCD TV you have chosen.

It is also important, of course, to get the very best price you can on the LCD TV you want. The suggested retail price of the typical LCD TV will vary according to a number of factors, such as the size of the display, the thinness of the display and the quality of the manufacturer. It is important to shop around as much as possible, and to read the reviews of all the models you are considering.

Finally, the ability to play several different television signal formats, such as PAL, NTSC and SECAM, is an important consideration. Different parts of the world use different formats for television signals and video products, and buying one of these multisystem LCD TVs is a good way to make it more versatile and useful while getting the best value for your money.

For more information see: http://www.planetomni.com

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Compare the different brand names available to you. Here I have listed 6

different popular ones with their various features.

Deluxe II: Two ellipticals are offered by this manufacturer. Both are

light-weight, and relatively inexpensive. Small and compact, they are easy to

move and set up. One style can be easily changed from an elliptical to a stair

climber and stepper.

Useful features include:

Hand pulse

Programmable display

Quiet and smooth magnetic resistance

Foam padded dual-action handlebars (which means they move in sync with the

pedals – this allows you to work your arms out at the same time)

Bottle holder (some with water bottle included)

Wheels for portability

Sturdy steel frame construction

7 series elliptical cross trainer: Maintenance-free magnetic resistance and

impact-free motion are two big benefits with this type of exercise machine.

Useful features include:

Dual action, push and pull handle bars

Large, easy to read LCD monitor

Measures: speed, time, distance, calories, pulse and workload

Built in hand grip pulse sensors that provide contact heart rate

Telemetry heart rate monitor

Sturdy steel frame

Built-in transport wheels

Water bottle and holder

Maximum user weight: 300 lbs.

Life fitness: The top choice of health clubs all over the world. These are

popular with athletic training centers and the armed forces because of their

high quality. There are multiple versions of this type of elliptical machine –

some are larger than others, though they all can hold the same weight.

Features include:

Digital heart rate monitoring system – this is the most accurate method

available

Lower body movement and arm action leads to a total body workout

20 levels of resistance

9 pre-programmed courses

Maximum user weight: 400 lbs.

Comes with a storage and reading rack

Precor elliptical: Patented EFX(TM) technology and the Cross Ramp(TM) incline. These

types of elliptical machines mimic cross-country training, as well as skiing,

walking, running, and climbing.

Forward or reverse stride

Industry standard

Elevation from 10-25 degrees, or 10-35 degrees, depending on make

20 levels of resistance

Power options: 110 volt/220 volt

8 pre-programmed courses

Some contain Polar® to measure heart rate

Maximum user weight: 400 lbs.

Contains a reading rack

StarTrac Natural Runner: Supplies a total body workout, with minimal impact on

your joints. These were the first ellipticals to be self powered – something

other companies have now introduced.

Has the longest stride of all the machines

Total body workout with arm action

15 levels of resistance

10 pre-programmed courses

Fitness test

Polar(TM) telemetry and contact heart rate monitor

Maximum user weight: 350 lbs.

>

StarTrac Elliptical Edge: similar to the Natural Runner mentioned above, but

also contains a towel, bottle, and personal stereo holder.

Readouts: speed, time, distance, calories, calories/min, heart rate,

resistance level, course profiles

All other aspects of this machine are comparable to the one above.

The smallest machines are the first four mentioned – but that does not mean they

can carry less weight. Smaller machines are lighter and easier to move out of

the way if you have a living area that doesn’t accommodate large machines.

Warranties vary depending on manufacturer, brand name, and retailer. On

individual machines, the warranty is often divided up according to frame,

electronics, motor, parts, manufacturer defects, and phone support.

Remember that you get what you pay for – so if you want the machine to last for

many years, you may want to splurge and purchase a more expensive elliptical trainer.

Either way, you will have a great workout without putting stress on

your joints!

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For years, we have been wanting to know just how much certain actions, like a 30-day late payment, affect our FICO scores (the score most lenders use). Finally, FICO has made this information public.

Here’s what we have always known: FICO scores are based on five key pieces of information that weigh differently on your credit score.

1. Your payment history is 35% of your credit score

2. Your debt level is 30% of your score.

3. Age of credit is 15%.

4. Types of accounts is 10%.

5. Recent applications for credit is 10%.

Now we know just how many points are lost with five key adverse actions:

680 score 780 score

Maxed-out credit card 10 to 30 points 25 to 45 points

30-day late payment 60 to 80 90 to 110

Debt settlement 45 to 65 105 to 125

Foreclosure 85 to 105 140 to 160

Bankruptcy 130 to 150 220 to 240

This list tells us:

o Bankruptcy is the worst thing for your score

o The higher your credit score, the more points you lose for negative actions

Here are some more details on the two hypothetical credit score profiles used to illustrate potential drops in score:

Alex, who has the 680 FICO score, has:

o Six accounts, including credit cards, an auto loan, a mortgage, and a student loan

o Eight-year credit history

o 40%-50% credit utilization

o A 90-day late credit card payment two years ago, 30-day late on his car loan one year ago

o No collection accounts or other negative public records

Benecia, who has the 780 FICO score, has:

o 10 credit accounts, including credit cards, an auto loan, a mortgage, and a student loan

o 15-year credit history

o 15%-25% credit utilization

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If you are bent on buying a new state-of-the-technological-art TV set, my choice would be the LCD television that is compatible with the PAL broadcast standard.

PAL, or phase-alternating line, is the standard broadcast system used in most parts of the globe, including Asia. To those residing in select countries of Asia and Europe in particular, it is important that their television sets be PAL compatible. Otherwise, their TVs would not be able to capture the video and broadcast programs. In other words, the television would have no signal and it will not work.

The PAL system is an analogue broadcast standard using some 625 alternating lines, and operates in most countries on the 50 HZ frequency. It is basically a system of encoding colours to produce greater picture details and broader colour luminance.

PAL is the broadcast standard use in Asia and Europe, in contrast to the NTSC system in the United States, Japan and others. The other or the oldest television standard is SECAM, which is still being adopted by a few countries, like France. First commercially used in 1967, PAL has eight different and generally incompatible types in use, throughout much of the world–types B, G, H, and also D, I, K, N and M. Asian countries on the PAL standard include China, India, Indonesia, Iran, Iraq, Israel, Laos, Lebanon, Nepal, Pakistan and Thailand. It is also used in the United Kingdom and most European countries and in some countries in South American and Africa.

A number of these new television models are out in the market, and fortunately, these are configured to work with the different world television standards. The so-called “multi-system” TVs invading the high-end market are able to receive broadcast systems from either PAL, NTSC or SECAM standards. Most of today’s advanced models are generally portable because they are lightweight, and you could even bring your very own TV along, to watch any local broadcast when traveling to almost any point in the globe.

Now, whether you opt for a multi-system model or not, we suggest that you choose a set with Liquid Crystal Display (LCD) monitor. LCDs offer a wealth of advantages not previously possible with conventional television.

Such a TV utilises the liquid crystal technology for its visual output. This technology is generally based on Thin Film Transistor (TFT). Early LCD TVs had certain inherent problems relative to the traditional visual display systems. It displayed ‘ghosting’ images with fast moving action and was best viewed looking perpendicular to the screen or from a slight angle. In the recent years, these problems have been over-come, and LCD TVs, along with Plasma displays, have become dominant TV products in the world market.

In October, 2004, the market saw the entry of LCD TVs with 40 to 45 inches screen, while Sharp announced the successful launch of a 65 inch panel. Consequently, in March, 2005, Samsung came out with an 82 inch LCD panel.

LCDs belong to the new breed of high-definition television that gives very sharp pictures and amazingly vibrant colors. Because of the vibrant images displayed on the monitor screen, LCD televisions can appear to give off superb contrast as well. This kind of television especially gives off captivating images during bright light situations. Backlight is built into each monitor to provide brightness.

Compared to the traditional Cathode Ray Tube (CRT) televisions, LCD monitors are flat. They are light in weight, unlike the CRT models that are very heavy and bulky. LCDs are so slim and flat that they can make to blend with the interior design of a room and can even be hung on the walls.

LCD or liquid crystal technology use millions of crystals trapped in a liquid base. When electricity is turned on, the heat-sensitive crystals, encased in between two panes of glass, allow light to pass through. In an LCD monitor, this property is manipulated in varying degrees so that the screen produces pixels of a broad range of colors and thus be able to display images. It is the light behind the glass panel that beams light through the monitor display. The liquid crystals, when subjected to electric current, block the light, resulting to patterns of gray and transparent crystals. The most commonly used type of liquid crystal is the twisted nematic or TN liquid crystal.

The tiny transistors are laid on a polarized glass substrate, and specific rows are turned on to allow an electric charge to reach a target column. This way, only a particular capacitor at a particular pixel is charged. This process is done in minutely exact increments, resulting in an amazing range of over 256 shades or levels of brightness for each color pixel.

LCD television traces its history to as far back as 1888 when Austrian scientist Friedrich Reinitzer first discovered the phenomenon of liquid crystallization. However, it was only in 1968 when the earliest LCD was developed by the RCA television company.

LCD monitors used to be available under-20 inch sizes. However, manufacturers have been utilising scientific advances to come up with better and bigger-sized LCD monitors. Certain models now reach up to 50 inches in width.

As LCD technology improves, so does the pricing. Where these TVs used to be more expensive than their Plasma counterparts, LCD televisions are now priced competitively and come in various sizes to choose from.

A very good feature of LCD TV is that its monitor can last up to 25 years or over 60,000 hours of normal use. This is so because its light source is replaceable. It also evades the occasional problem of burning-in, that can affect the other kinds of television. This is owing to the fact that unlike Plasma TVs, LCDs do not use phosphor dots; instead colour filters–red, green and also blue–are utilized in the layered active matrix panel.

The LCD televisions that first appeared in the market did not produce good visuals when compared to CRT TVs. The early models had “ghost” images when displaying fast acting scenes. Today, however, LCD viewing has become a pleasurable experience, and even highly anticipated. Pictures viewed are very smooth and clean because of the so-called “reverse pulldown” correction, that the television does to the distortions caused by the process of transferring film into video for broadcast purposes.

LCD television of all brands and sizes have flooded the market. Among the big manufacturers are Sharp, Sony, Samsung, Panasonic, Hitachi, JVC and LG Philips. Generic LCDs, which naturally come at lower prices, are readily available through the Internet. Prices can run as low as under $200 and as high as over $1,000, depending on its brand, features widescreen or standard aspect ratio and size. LCD TVs come in flat panel, rear projection and now, even in wireless or portable models.

Before buying your new LCD television, however, it is best to remember certain things. Firstly, try to visualize the placement for your TV. Capitalise on the fact that LCD models are sleek and compact. An LCD monitor is actually more of a decorative fixture rather than a mere home appliance. If you are buying a flat panel model though, installing it should be a breeze and almost like a painting to behold. Wall or ceiling mounts and table stands can also be used to display your LCD television.

Also, decide where to buy your new digital TV. It might be better to purchase your LCD unit in an established dealer around your residence to facilitate easier or quicker access to after-sales service. Take note that prices can vary, with stores offering the best prices likewise offering the least quality service. But whether you are shopping via the traditional route or via the Internet, always try to background check a retailer; and find out more about its policies and record of service. Do not forget the insurance.

Aside from the visual experience and the sleekness of designs, LCD technology has made possible, perhaps the important feature of LCD television, is its practical offer of reduced power consumption. LCD TVs are very, very energy-efficient and, inch for inch with CRTs, consume over 50 percent less electricity. In other words, you can bring in to your home big-screen experience sans the extra cost of added electricity. And because “burn-in” is not an issue with LCDs, your family can practically watch your entire favorite broadcast programs or DVD movies nonstop.

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Although you may not think it, but 21% of the green house gas emissions produced in the united states come from everyday household energy usage. By implementing cost efficient energy saving techniques, you can help reduce these emissions while saving money at the same time.

Improving your homes efficiency

Compact fluorescent light bulbs last up to 10 times longer, produce 75 percent less heat, and still produce the same amount of light as an incandescent bulb with only 25 percent as much energy usage. By simply swapping your old lights out for these new ones, you can see a drastic reduction on your monthly energy bills. If you want to take it to the extreme, you can easily make the switch to solar power. Solar panels are getting cheaper to purchase, easier to install, and will last for around 20 years. In addition to cutting your energy bills, the federal government also offers a tax credit of up to 30 percent of your installation cost.

Reducing Heat Loss

By making your home almost air tight, you can improve your homes energy efficiency by 20%. Add/replace old weather-stripping to your windows and doors as well as plugging any other leaks in your home can stop/reduce heating and air conditioning losses. You may also want to consider adding insulation where it’s missing or has a minimal amount. this will reduce heating/cooling expenses as well as reduce moisture buildup in your ceilings and walls.

Electronics and Appliances

75% of a homes electricity is consumed by electronics and appliances while they are turned off according to the U.S. department of Energy. This can be reduced by unplugging devices when their are not in use. You can also reduce this amount by swapping out your old appliances with new energy-saving models.

Hot Water

For every 10 degrees in temperature you increase your water heater, you use an additional 5 percent of energy. By reducing the temperature you can be saving yourself unnecessary expenses as well as lengthening the lifespan of your water heater. If you wanted to eliminate this problem all together, Tankless water heaters only warm your water when you need it. Instead of constantly heating your water to maintain a set temperature, these devices use up to 60% less energy than your traditional water heater.

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Spain’s DVD Region

Spain belongs to Region 2 and its DVD players are coded for Region 2 only. Hence, these players are able to play only Region 2 coded DVDs. They are unable to play DVDs that are coded for Regions 1, 3, 4, 5, or 6. To overcome this limitation, the regionfree or codefree DVD players are used. A regionfree DVD player is one that is able to play DVDs from any part of the world, belonging to any of the Regions, 1 to 6. The players are designed in such a manner that they are able to switch to the relevant code for the DVD being played. Certain other DVD players are provided with a chip set that enables them to read DVDs from other regions.

PAL and NTSC Standards in Spain

In Spain, there are two types of DVD players available, the Region 2 type players, which can only play code 2 DVDs, and the regionfree or codefree DVD players, which can play any type of DVD. The Region 2 DVDs are PAL formatted and need televisions of standard PAL format to be able to be played. The DVD players are also manufactured having the PAL video format. The Region 2 DVDs are also provided with PAL to NTSC and NTSC to PAL convertibility and are able to play any type of DVD, PAL, or NTSC video format.

These PAL formatted Region 2 coded DVDs and the PAL-NTSC region coded players are readily available in all the local electrical stores and supermarkets. They are priced at around the $80 to $330 range, depending on the brand and the features provided. The major brands available in the Spain market are Panasonic, Samsung, Denon, Hitachi, Sony, Philips, and many others.

The regionfree DVD players are also available plentiful through the Internet, and are priced higher than the region coded types. These multi-region DVD players are equipped with PAL – NTSC convertibility and are able to play DVDs from any part of the world. They are priced higher and can be purchased in the price range of $200 to $770, depending on the features.

Electrical Supply Obstacles in Spain

The electrical supply in most of Spain is 220 to 225 volts AC and 50 Hz frequency. The Region 2 DVD players and the regionfree DVD players that are locally produced are designed to be 220 volts compatible. The regionfree DVD players would need a step down rig or adaptor to enable the DVD player to function. A few recent DVD players are fitted with a dual voltage adaptation function and are provisioned to adjust according to the inlet voltage for playing a CD.

A Wealth of Features

The DVD players are available with a range of features to woo the customers and provide them with a total entertainment experience. They are available in the portable and wall mounted forms as well, at a slightly higher price. The newer combo DVD players are equipped to be able to play a wide range of devices, including CDs, MP3s, DVD-A, DVD-R, DVD-RW, WMA, and also the JPEG and MPEG 4 drive modes.

It is legally permitted to use and own region free DVD players in Spain, provided it is not put to illegitimate use.

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The Laptop’s LCD screen has officially filed an immediate and irrevocable resignation. Replacing it with a new LCD screen is impractical as the costs will be almost equal to buying a new computer. That’s absurd, so what will you do? Turn the laptop to a desktop by installing an external monitor! Here’s how.

Get a desktop computer monitor along with a power cord. Typically, monitors come with a complete computer set of computers so direct-to-socket monitor power cords are quite uncommon. However, you can buy such gadget at a local computer store often for less than five dollars.

This allows you to plug the monitor into a power socket just like what you would with a regular TV. Be careful about the voltage ratings though. Check if the power outlet’s voltage matches your monitor’s. In the US, the typical output voltage of power outlets is around 110-120 volts. This number matters a lot since most of Asian-made monitors work at about 220 volts.

See if you will need to use some special transformers or adapters. However, most modern monitors work at a wide range of voltages that typically cover 110 to 240 Volts. But then, be careful by exercising due diligence.

Now that you have them ready, unplug everything first. Here is a step-by-step sub-guide on what to do next:

Plug the external monitor’s power cord to a power outlet.
Plug the external monitor’s video input cord to a port at the side of the clunky laptop. The cord’s end can either be plugged to a USB port or that dime-sized, trapezoid-shaped port with lots of needles. Just chuck it into the right spot. There is virtually no risk of plugging it into the wrong socket because if it you’re doing wrong, the ends won’t fit anyway. This is the time when we all love geeks.
Turn the monitor on, and turn the PC on afterwards. Voila!

Notes:

If you really are in an emergency, you also have the option to use an old computer chassis with a power supply that has a functioning output for monitors. It doesn’t matter if that computer doesn’t work anymore as long as the monitor the power outlet for the monitor at the back of the chassis is still operational. Plug the monitor’s power cord into the back, plug the chassis power cord to a regular power outlet and then go with step B and C. Voila!

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SWITCHYARD and GENERAL SIGNIFICANCE

Electrical energy management system ensures supply of energy to every consumer at all times at rated voltage, frequency and specified waveform, at lowest cost and minimum environmental degradation. The switchgear, protection and network automation are integral parts of the modern energy management system and national economy.

The modern 3-ph, 50 Hz, AC interconnected system has several conventional and non-conventional power plants, EHV AC and HVDC Transmission system, Back to Back HVDC coupling stations, HV Transmission network, substations, MV and LV Distribution systems and connected electrical loads. The energy in electrical form is supplied to various consumers located in vast geographical area, instantly, automatically, and safely with required quality at all times. The service continuity and high quality of power supply have become very important.

For fulfilling the foresaid purpose, a state of the art, scientifically and technologically advanced SUBSTATION is required. Sub-Station is the load control center of the thermal plant where power at rated voltage, frequency and waveform is exported/imported as per requirements.

The substation at GHTP Lehra Mohabat has only one 220 KV switchyard. There are two output units each having a capacity of 210 MW. The generating voltage is limited to 15.75 KV and this voltage as stepped up by two-generator transformer 15.75/220 KV manufactured by BHEL. A part of 15.75 KV supply is fed to unit auxiliary transformer, which is stepped down to voltage 6.6 KV which is used to run the major auxiliaries of the plant.

After step up, the 220 KV output from the generator transformer is fed to either of the two bus bars through relays and circuit breakers and these are connected to various feeders through various equipments.

DIFFERENT TYES OF EQUIPMENTS USED IN SUB-STATIONS

1. BUS-BARS: -

Bus bar is a term used for main bar of conductor carrying an electric current to which many connections may be made. These are mainly convenient means of connecting switches and other equipments into various arrangements.

At GNDTP there are two 220 KV bus bars. These are made of aluminium and all the incoming and outgoing supplies are connected through the bus bars.

2. LIGHTENING ARRESTORS: -

These are equipments designed to protect insulators of power lines and electrical installations from lightening surges by diverting the surge to earth and instantly restoring the circuit insulation to its normal strength with respect to earth.

3. CURRENT TRANSFORMERS: -

The main purpose of current transformer is to step down the current to a level that the indicating and monitoring instruments can read. When rated current flows through its primary winding, a current of nearly 1 amp will appear in its secondary winding.

The primary is so connected that the current being passes through it and secondary winding is connected to an ammeter. The CT steps down the current to the level of the ammeter.

4. POTENTIAL TRANSFORMER: -

These are used to step do the voltage to a level that the potential coils of indicating and monitoring instruments can read. These are also used to feed the potential coils of relays. The primary winding is connected to the voltage being measured and the secondary winding to a voltmeter. The PT steps down the voltage to the level of the voltmeter.

5. POWER TRANSFORMER: -

These are used to step up down the voltage from one a.c voltage to another a.c voltage level at the same frequency. Shunt reactor in EHV substations is to provide reactive power compensation during low loads.

6. WAVE TRAP: -

Wave trap is used to prevent high frequency signals from entering other zones.

7. INDICATING AND METERING INSTRUMENTS: -

Ammeters, voltmeters, watt meters, KWH meters, KVAR meters are installed in sub-station to watch over the currents flowing in the circuit and the voltages and the power loads.

8. ISOLATORS: -

One of the cardinal measures for ensuring full safety in carrying out work on equipment in electrical installations is to disconnect reliably the unit or the section on which the work is to be done from all other live parts of the installation. To guard against mistakes, it is necessary that apparatus, which makes a visible break in the circuit such as isolators, should do this.

Isolators do not have arc control devices therefore cannot be used to interrupt currents at which the arc will be drawn across the contacts. The open arc in these is very dangerous, in that it will not only damage the isolator or the equipment surrounding it but will also cause the flashover between the phase in other words, it will result in short circuit in the installation i.e. why isolators are used only for disconnecting parts after de-energizing them by opening their respective circuits by use of their circuit breakers.

9. EARTHING SWITCHES: -

Earthing switch is used to discharge the voltage on dead lines to earth. An auxiliary switch to provide interlock always accomplishes it.

10. CIRCUIT BREAKERS: -

Circuit breakers are mechanical devices designed to close o open contact or electrical circuit under normal or abnormal conditions. CB is equipped with a strip coil directly attached to relay or other means to operate in abnormal conditions such as over power etc. In GNDTP three types of CB are used. SF6 CB is used to control 220 KV in switchyard.

VCB are used to control 6.6kv in switchgear & ABCB are used to control 415 KV in switchgear.

In sulphar puffer type SF6 CB is filled with SF6 gas at single pressure (4to6kgf/cm2). The pressure and gas flow required for arc extinction is obtained by piston action.

In double pressure type SF6 CB the gas from high-pressure system is released to into low-pressure system over the arc during the arc quenching process.

SPECIFICATIONS OF CB TYPE ELF-SL4-1

S. NO. SPECIFICATIONS RATINGS

1. Voltage 245KV

2. Normal current 3150 A

3. Lightening impulse withstand Voltage 1050V

4. Switching impulse withstand voltage 1050V

5. Short circuit breaking current 40KA

6. Short circuit withstand current And duration 40KA 3 sec

7. Line charging breaking current 125A

8. Operating sequence – First pole to clear factor 1.3

9. Supply voltage 220 V dc

10. Auxiliary circuit supply voltage 240 V dc

11. Air pressure 20.5 bar

12. Frequency 50 HZ

13. Mass 3800 kg

14. Rated current 1600 A

11. VARIOUS OTHER EQUIPMENTS

Shunt capacitors are used to provide compensation to reactive loads of lagging power factor.

Series reactors are used to reduce the short circuit current or starting currents. Neutral grounding resistors are used to limit the earth fault current.

Coupling capacitors are used to provide connection between high voltage line and power line carrier equipment.

Operating Voltage 230 V

Rated current 2000 A

Minimum short circuit current in bus bars 40 KV

Minimum phase to phase clearance 2.5 M

Number of horizontal levels of tubular bus bar/flexible bus bars 2.0 M

Height of tubular bus-bar of first level above ground 6 m

Height of tubular bus-bar of second level above ground 4 m

Tubular aluminium bus bar AL ASTMB241 4″IPS (International pipe standard)

VARIOUS SUBSYSTEMS IN SUBSTATIONS AND THEIR FUNCTION

S.NO. SYSTEM FUNCTION

1. Substation Earthing (Grounding) System – Earth mat – Earthing spikes – Earthing risers To provide an earth mat for connecting neutral points, equipment body, support structures to earth. For safety of personnel and for enabling earth fault protection. To provide the for discharging the earth currents neutrals, faults, surge arrestors over-head shielding wires etc. with safe step- Potential and touch potential.

2. Overhead earth wire shielding or lightning To protect the outdoor substation equipment from lightning strokes.

3. Illumination system (lightning) – For switchyards – Buildings – Roads, etc. To provide illumination for vigilance, operation and maintenance.

4. Protection system – Protection relay panels – Control cables – Circuit breakers – CT’s, PT’s, etc. To provide alarm or automatic tripping of faulty part from healthy part and also to minimize damage to faulty equipment and associated system.

5. Control cabling For protective circuits, control circuits, metering circuits.

6. Power cables To provide supply path to various auxiliary equipments and machines.

7. PLCC system power line carrier current system – Line trap – Coupling capacitor – PLCC panels For communications, telemetry, tele control power line carrier protection, etc.

8. Fire fighting system – Sensors, detection system – Water spray system – Fire protection control Panels To sense the occurrence of fire by sensors and to initiate water power spray, to disconnect power supply to affected region to pin point location of fire by indication in control room.

9. J Cooling water system – Coolers – Water tanks This system is required for cooling the valves in HVDC substation.

10. DC batteries sets and battery chargers Auxiliary low voltage DC supply.

11. Auxiliary stand by power System – Diesel generator sets – Switch gear – Distribution system For supplying starting power, stand by power for auxiliaries.

12. Telephone system For internal and external Communication.

12. BUS BAR ARRANGEMENT IN SWITCHYARDS

There are several ways in witch the switchyard can be connected in the electrical layout of generating station, receiving station or a switchgear in a distribution system. The following aspects in general affect the selection of the scheme:

1. Degree of flexibility of operations desired.

2. Importance of load and local conditions.

3. Economic conditions, availability, and cost.

4. Technical conditions.

5. Maintenance, safety of personnel.

6. Simplicity.

7. Provision of extension.

8. Protective zones.

DUPLICATE BUS BAR ARRANGEMENT

The duplicate bus bar system provides additional flexibility, continuity of supply and permits periodic maintenance without total shut down. In the event of fault o n one bus the other bus can be used.

While transferring the power to the reserve bus, the following steps may be performed:

1. Close tie circuit breaker, i.e. bus coupler. The two buses are now at the same potential.

2. Close isolators on reserve bus starting from far end.

3. Open isolators o9n main bus starting from far end.

Each pole of the circuit breaker comprises one or more interrupts or arc extinguishing chambers. The interrupts are mounted on support insulators. The interrupts enclose a set of fixed and moving contact. The moving contacts can be drawn apart by means of the operating links of the operating mechanism. The operating mechanism of the circuit breaker gives necessary energy for opening and closing of contacts of the circuit breaker.

13. RELAYS

Relay is a device by means of which an electric circuit (trip or alarm circuit) is controlled (closed) by change in the other circuit. Relays are automatic. The function of relay in power supply system is to recognize a start out and to initiate the operation of CB or other devices to isolate the defective elements with minimum disturbance to the normal power supply system. The must operate at required speed and stability to prevent the current and voltage to exceed their limits.

A few relays with their international codes are mentioned below:

S. NO. CODES TYPES

1. 27 Instantaneous under voltage relay

2. 99 Composite motor protection relay

3. 64 Earth fault relay

4. 87M Differential relay for motors

5. 50N Earth fault relays with times for time delayed operation

6. 95 Fuse failure relay

7. 80 Auxiliary supply for DC supervision

8. 80B DC supply control supervision

9. 80A Relay for mains

10. 500/L Triple pole over current definite term

11. 98 Trip circuit supervision relay

12. 87 Triple pole circulating current

13. 63 Auxiliary relay for transformer fault indication

14. 33B Auxiliary relay for stop

15. 25 Check synchronizing relay

16. 52SC Instantaneous high set over current relay

17. 2B Static time delay relay

18. 51RYB Single pole (IDMTL) Inverse definite Minimum time over current relay.

THE FAULT CLEARING PROCESS

During abnormal or faulty conditions the relays sense the fault and close the trip circuit of the circuit breaker.

As the relay contact close, the trip circuit is closed and the operating mechanism of the CB opens and an arc is drawn between them. The arc is extinguished at some natural current zero of a.c. wave.

o Fault Occurs: – As the fault occurs the fault impedance being low, the currents increase and the relay get actuated. The moving part of the relay moves because of the increase in the operating torque. The relay takes some time to close its contacts.

o Relay contacts close, the trip CB closes and trip coil is energized.

o The operating mechanism starts operating for the opening operations. The CB contacts separate.

o Arc is drawn between the breaker contacts. The arc extinguished in the CB by suitable techniques. The current reaches final zero as the arc is extinguished.

SWITCHGEAR

The switchgear constitutes all parts or equipments of power plant whose function is to receive and distribute electric power. It comprises of the following:

· Assemblies of switching apparatus

· Protective and indicating metering devices

· Interconnecting bus bar systems and relevant accessories

Functions of Switchgear: -

The functions performed by switchgear are listed below: -

· To facilitate redistribution of load, inspection and maintenance of system.

· To localize the effects of faults by operation of protective equipment so automatically disconnect faulty part from the system.

· To break efficiently short circuits without giving rise to dangerous conditions.

The switchgear has the responsibility of transmitting the power from the generator to the grid. However plant also needs power for its working. It is mandatory not to use more than 10% of the power developed by the plant. So that all the auxiliaries and lightening system of the plant must be designed in such a way that there consumption is in the limit.

There are two bus bars placed in ducts, which supply power to the switchgear and are fed by two station transformers ST-I and ST-II. The rating of these identical bus bars is 6.6 KV, 3150 Amps, 50 Hz. These are known as C-I and C-II station buses respectively. The material of conductor is Aluminium. C-I station bus feeds US-IA & US-2A buses and C-II feeds US-IB & US-2B buses. C-I & C-II buses are also interlinked. These unit service buses feed the different kinds of load.

The auxiliary voltage for the ac supply system is 6.6 KV and 415 V. 6.6 KV supply system is provided with high resistance grounded neutral with provision of alarm/ trip. 415V auxiliary supply system has solidly/high resistance earthed neutral. All the electric motors of 150 KW rating or below are rated at 415 V and motors above 160 KW are rated at 6.6 KV.

GENERAL ELECTRICAL SUPPLIES IN THE PLANT

Electrical Auxiliary System

· AC Auxiliary supply system

· DC supply system

AC auxiliary supply system is used to feed all the AC auxiliaries installed in the plant.

The DC supply system which consists of 220 V DC, 110 V DC,

+/- 24 V DC, 48 V DC etc. is used for control supplies as required for system control and protection equipment.

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The thought of a HDTV came from wide-screen movies. As soon as the wide-screen was introduced, It was seen, that individuals who were seated in the first few rows enjoyed the effect much more, having a level of participation in the action. This was not seen in case of the conventional movies. A greater feeling of ‘being there’ is felt with the wide-screen occupying a greater field of view, especially peripherally.

High-Definition Television (HDTV) was launched in the market in the year 1998. If stating the reference of HDTV to a common man, it is all about a superior resolution and digital surround sound quality in the new state-of-art television95 – HDTV. It refers to the broadcasting of signals with much higher resolution than before. Today around 80 other devices are sold in the market as HD but in actual they are not HD ready products. They may be good quality TVs, but they lack one necessary condition of being High Definition This is a High Definition Multimedia Interface adaptor which automatically lets the TV set handle the high resolution images all by itself.

Until now, the working of a TV involved some analog signal and a Cathode Ray Tube (CRT) unit. The incoming signals were electronically processed into a picture and sound, displaying the picture on the TV screen. This conventional CRT set has a display of about 480 lines of pixels and all the signals worked well for years till the idea of higher resolution evolved. A higher resolution signal for better quality and more clarity could not have worked on this old model of CRT. Also, the conversion of the signals lowered the quality leading to more degradation in the class of the display and sound, in the traditional model of CRT.

The new HDTV is almost incomparable to the Standard Definition Television (SDTV) in many terms, like, HDTV has twice the resolution in comparison to that of the SDTV, providing higher picture clarity.

Further, the range of broadcasting signal for HDTV can also handle higher ‘aspect ratio’ pictures of higher resolution, without the use of ‘letter boxing,’ thus further increasing the over all resolution for such signals. An aspect ratio is the measurement of the image displayed. It is the width of the image divided by the height. A traditional SDTV uses an aspect ratio of 4:3, while a HDTV has a much higher aspect ratio of 16:9 which helps the HDTV to handle bigger pictures and there is no need to compress them as well. HDTV also avoids the use of letter boxing; therefore, one can view the images in their original for wide form. Letter boxing is the technique of compressing the widescreen images to video formats.

The highest resolution of a SDTV is the lowest resolution of HDTV. For the reader’s information, the highest resolution for SDTV is just 704 x 480 pixels, while the highest resolution for HDTV is 1920 x 1080 pixels. Thus a High Definition TV can display 10 times more pixels than an analog SDTV set. The frame rate in seconds, which is best described as the frames per second, or the number of frames required to form a complete picture per second. The technology in a HDTV has a frame rate of 60 per second.

To express the advantages of HDTV purely in non-technical terms here are some of the points listed below:

1. Since High definition TV is digital in nature, it receives the transmitted digital signals. Either there is a signal or none signal at all. There will no blurred signals or weak signals, or signs of signal interferences. An HDTV will either deliver an excellent picture, a still picture or no picture at all. You would never get a snowy or washed out image from a weak signal, effects from signal interference, such as herringbone patterns, or vertical rolling.

2. Most HD programming TVs are presented in the 16:9 proportioned aspect ratios, with wide screens. These screens have some amount of empty space left out at its margins which can be used up easily in case of wide images. This displays the full width of the image.

3. There is also an option of enlarging the screen if the user wants to. In addition to this facility, the images can also be enlarged to fill up the whole screen; however this option will display a distorted, stretched-out picture.

4. A larger bandwidth is used for transferring signals for HDTV, so a very realistic image is formed with true colors. The reason behind this is that, the different colours lie in different ranges of the bandwidth. Therefore, if the bandwidth is increased, so will be the definition of the colours, and naturally better picture quality will be achieved.

5. Since the number of scanning lines are much more in a HDTV, providing a higher resolution, overall visual information is about 2-5 times more detailed in comparison to the normal SDTV. The spaces between scanning lines are smaller or invisible so a better quality is obtained.

6. The increased clarity and detail make larger screen sizes more comfortable and pleasing to watch for the user.

7. Dolby Digital 5.1 sounds are broadcasted along with standard HDTV video signals thus allowing full surround sound capabilities, where-as the broadcasted signals for SDTV are just the basic audio signals.

This new invention of HDTV is surely a noticeable leap in the technology, giving a higher standard to visual as well as sound quality. The true high-definition standard, in contrast, has brought in significantly greater resolution for everybody to enjoy. The up coming new models of HDTV- 720p and 1080i formats, which are very common in today’s HD television sets, brings in image clarity several times higher than the standard definition TV model. For the time being, 1080p, the most highly developed and sophisticated HD standard model, is claiming to have images of higher clarity details than anything else out there in the market. All of the HD set-ups are designed for 16×9 widescreen televisions, just like today’s movies. So just get out there and enjoy!

In short, HDTV has been termed as the technology of the future. In comparison to a standard analog TV, it features a much higher resolution, clarity and over twice the resolution of DVDs.

Fifty percent of the consumers in U.S. intend to buy a HDTV for their next television. Among the HDTV owners, more than 66% indicate HDTV as their next TV purchase. it is interesting to note that, by law, as from 17 February, 2009, U.S. TV stations will stop analog broadcasting. People continuing with their standard analog TV, will have to procure digital-to-analog converters.