why The voltage in the us 110v\60Hz is different from european 2250Hz?

Answer 1

Realpontiacman is partly correct. However, the peak voltage in the sinusoidal waveform he described is actually square root of two (1.414) times the nominal 220 volts, or 311 volts. This is because the nominal voltage is what is known as a root mean square (rms) average. If you were to take the sine wave (actually the absolute value of the sine wave) and level it out, you get the rms value. The rms value is used in electrical calculations instead of the peak value because it gives a true representation of the power transmitted.

Also, the voltage won't affect the amount of wear and tear on a motor. It just determines the number of turns in the motor windings. A particular magnetic field strength is needed to start and run a motor. The higher the voltage, the fewer turns needed in the electromagnet.

The frequency may affect motor life, I'm not sure. 50 Hz motors run slower than 60 Hz motors, and may last longer because they haven't rotated through as many revolutions.

The most significant difference is that the current is lower when the voltage is higher, allowing smaller size wiring for the power distribution. In this day of rising copper prices, this could amount to significant savings in electrical construction costs.

I believe the real reason that there are differences between the US and Europe is that is how the standards evolved. In the early days of electricity, different communities had different power systems. Some cities had DC power, other cities had AC power but at varying frequencies. DC was eliminated once the advantages of AC power became apparent. Over time the voltage and frequency became standardized. It is just that the standard that evolved in Europe is different than in the US.

Answer 2

The easy answer to this is - tradition.

The development of power was happening simultaneously in the US and the UK and Europe, but in isolation. The 60hz versus 50hz has to do with generator speeds.

As for the voltage - everyone uses 480 and steps it down for residential use. In the US, 240V was deemed too high (and therefore dangerous) at some point.

I deal with a lot of custom equipment for both European ("CE" marked) and US use. I have to use a lot of "sensing power supply" and "dual frequency" components to get around this stuff. It really comes into play if there is any type of significant "work" going on in the machinery (computer rely on DC voltage, so a sensing power supply is used for the voltage, and the frequency is of no consequence in the DC conversion).

Answer 3

I am assuming that you are asking only about the voltage?? The difference in Hertz is due to the difference of the sine wave. Imagine a three line graph - one line across the near top of your page, one across the middle and one near the bottom. The top line represents +220V, the middle is 0V and the bottom is -220V. Now draw a smooth curving line starting at 0V at the left side of your page up towards the +220V, and then smoothly curving back to 0V and then on to -220V and then back to 0V. This is the sine wave. Their voltage goes from 0V to +220V ~to 0V~to -220V and back to 0V 50 times a second whereas in North America it goes from 0V to +115V to 0V to -115V and back 60 times. Nevermind the difference in voltage - it's still the time it takes to travel from 0V to the plus side, back to 0V, then to the minus side and back to 0V again. Their voltage is higher because it is delivered to their homes at a much higher voltage than in North America. Our generation stations put out a voltage that is stepped down via a transformer from 2300 volts going into the transformer which is then stepped down into 230V (because your house has two "hot" lines <2 rated at 115V> and needs them for such appliances as dryers and stoves. Many European companies believe that electric motors and appliances last longer over there because when you start an electric motor for instance, it takes more power to initially start it then to continually run it - so if you are starting it with a higher voltage, the less wear and tear there should be on a motor. Plus the higher the voltage, the lower the amperage (the amount of current or power it takes to start and run the motor).

Answer 4

I actual did not get a danger to observe those matches in contact so might want to no longer have finished insights. Sehwag had no reason to withdraw his charm, he change into interior finished rights. It change into thoroughly contained in the spirit of the game, what the batsman change into attempting to do change into no longer. no choose for a caution both with the aid of the bowler. If the batsman would not opt for to get out then stay contained in the crease. If it change into sparkling he change into operating to make a run and then at the same time as spoke of that he might want to be out. will strengthen his palms that he has an harm then he ought to receive out. yet there is also income of the doubt, he absolutely might want to have pulled something or authentic harm. If he's injured no longer going he will dive its stupid. Hussey isn't the style of participant from his list who might want to attempt something humorous. he's a honest participant. deliberately or accidentally bowlers might want to no longer stand contained in the middle. Batsmen opt to run to score, so as that they must be off the pitch at modern-day. i don't understand what the situations were, yet when bowler is on the pitch a rule must be made batsman shall no longer receive out. Bowlers must be of the pitch. Its batsman's proper no longer the bowlers. including his palms on the hips what change into he doing status there contained in the first position? Umpires might want to admonish such bowlers even with who that is. i do not learn about something of the situations, even if that is being stated Tendulkar did not even hardship floor his bat. And with or without Lee status there he might want to've been out. This regulation must be clarified now IMO regardless. That if bowler deliberately or accidentally stands on the pitch hindering the batsman. The batsman shall no longer receive out. I consistently hate that.