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The Impossible Quiz

Sunday 24 March 2013

Correct voltage?

Voltage

 

In any case, the complex question. The question "What is the correct voltage?" Is almost at the beginning and what lies before us. A good start would be a certain tension, but is based on generally accepted specification. What is helpful is a higher specification and a new will have more or less the same result and is therefore a good start.

The previous specifications, said: "240 -10 .. 6%." This means limits of 216 .. 254.4V. The latest specifications (50160) said: ".. 230 -6 10%" and results in 216.2 .. 253V. Wait! We just mention two voltages with boundaries very similar, so a show that seems to be to an acceptable voltage instead of a fixed point. The only reason for a symbolic price is a target. Imagine a game of darts, without the rings, not to say very funny "if you have the arrow on the map, you have won!".

However, with a track has a purpose. This means that the network has to be perfect (lossless) and allows you to "give" under stress. If all the current drawing (eg lunch break), then the net result of mere physical forces have been identified as the voltage drop in the sense, that end-users no longer get pumped

But here is a small brush. The network operators are aware of the range is the permissible stress and performed with the goal of a nominal design human, treat it as a speed limit on highways. While there is no minimum speed allowed and a maximum, which is not always seen that people are what some "nominal". Most are designed to remain around the ceiling.

The positive argument is that it's easy technical advantages of a slightly higher voltage drop. The engines are to run faster, therefore the time reduce inrush current, reducing the consumption of a system, so that the amount of perceptible flicker which also reduces the higher voltage, because lamps burned white. There are other such convincing arguments, and prefers to believe them.

The real reason is held behind the voltage is 240-245V purely financial and has a two-pronged approach. Network demand is growing and is expected voltage at the beginning, enough to increase power to the customer at the end of the line for you. This is usually by simply changing a tap on a transformer and no money to improve the network as such spending reached. This has a slight defect, increasing the losses, but ....

It also raises the total power consumption. Now, power, V ² is connected, this means that consumption is proportional to the change in voltage increases instead! This means that consumers are unwittingly forced to spend more of their hard earned money separate. Despite the above losses are higher, the proportion of energy consumed. The equation is simple: the power of the network of operating companies, the greater your benefits for a period of time, and faster than their debts. I know this sounds cynical, but the sad reality is that it is the case in general.

The mechanics, which proved to be too easy for some. What is the fact that although the standard voltage (eg 230 V) to be delivered to your home called to push utility this to 240 or even 245V to 250V (especially during the "quiet" hours.) Some things (such as switching power supplies) tend to rising to a reduction in the current as the voltage, the majority of devices in the house no. The current increases with stress.

These items are lamps, washing machines, refrigerators (refrigerator), articles, etc., such as kettles not as susceptible to this problem (even if the electricity, water boils more quickly so that the actual energy consumption is more or less the same.)

A motor fridge is a good example of waste is the engine usually a squirrel cage type, which means it operates at a speed of the frequency, not voltage determined. If the voltage just to warm up the engine. Working with the engine warm refrigerator not only to keep food cold, but also work against the action of the engine now is the effort (eg, hot) because of the additional power.

The result is an increase in energy losses in the domestic hearth. Although the network losses are higher because of higher power consumption is the power company concerned that these losses are proportional to the final use. I would not enter into the calculation here, but suffice it to say that you sell and buy in bulk, in bits. The company does not benefit more to do (in business sense!), And this occurs when the voltage increases.

All would be good if energy demand were stable supply company adjustments on the road to be made whole. Unfortunately, this is not the case and the attitude of the bean counters, we let the real problem of voltage fluctuations. In the short term this will not go away and if hypertension is a problem, then the source of the company, just ask to reduce it.

But not everything is dark and there is a glimmer of hope in the use of modern technology. This system uses effective techniques to overcome the current which consumes the same amount of energy, independent of the voltage. In short, the higher the voltage the lower the current. This has two advantages, given that the networks will be implemented in a little air and have less of a change in the total demand. In the long run expect a better environment because less fuel to be burned. We are a long way and honest.

Because the network (in-house installation OT) are not in line with demand, are "softer" This brings us to another problem. These properties are mainly domestic workers who suffer from this effect. In the past, the charge was a couple of lamps, but now that more applications are used in the household, the Office was very sporadic, with rapid changes in voltage. This is to an extent as the input impedance are known. Examine the next .
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