Small partners who often travel abroad will definitely find that sockets in some countries write 110V instead of 220V on Chinese sockets. Wow, does the voltage also have national boundaries, and each country is different?
So, is the voltage of 220 volts Chinese characteristics?
First look at the voltage situation of a group of national electricity
100 volts
Only 2 countries
Japan, North Korea
110 to 130 volts, about 30 countries (regions)
United States, Canada, Panama, Cuba, Lebanon, Mexico, etc. and Taiwan, China
220 to 230 volts, about 120 countries, UK, Germany, France, China, Singapore, Hong Kong (200V), Italy, Spain, Greece, Austria, Netherlands, Philippines, Thailand, Norway, Singapore, India, New Zealand, Australia
(Of course, in countries with 220-230 volts, there are also situations where it is necessary to use 110 to 130 volts, such as Sweden and Russia.)
It turns out that there are still quite a lot of countries in the world that use 220 volt AC. However, the problem is not over yet: Why is China not using the same 110 volt AC as the United States? The idea of ​​a small partner is generally: the voltage is lower, it seems to be safer.
This problem is more complicated, listening to Xiaobian slowly.
In 1879, Edison produced a better-effect carbon filament incandescent lamp. The incandescent lamp at that time operated well at 110 VDC, which Edison considered to be a safe and economical voltage in power distribution.
But later, another voltage level - 220 volts was also recommended for use in the low voltage field. After the two great geniuses Edison and Tesla had a big argument about "DC or strong communication", the United States gradually began to adopt 110 volt AC. Of course, in the United States, there have been many voltage types in the development of the power system, but mainly 110 volts and 220 volts, and 110 volts gradually won during the development process.
With the advancement of electrical appliances and the development of transmission means, there is no difference between the practical use of 110 volts and 220 volts.
So, why don’t China learn the Stars and States, using 110 volt AC voltage?
Because, after using 110 volts AC voltage in the United States, Europe believes that the voltage of 110 volts is too low, and the loss is much larger in transmission (at that time, variable voltage and high voltage transmission are not very common), and some electrical appliances are not enough. Pushed 220 volts and was later inherited by most countries.
As we all know, the old China's low productivity and economical failure can reduce the loss and reduce the consumption of metal such as copper. Of course, it is very good. 220 volts is easily accepted by power supply operators. In the 16th year of Guangxu reign (1890), Shanghai began to use incandescent lamps with a voltage of 100 volts. In the 27th year of Guangxu (1901), the Shanghai public concession began to supply electricity day and night, and the voltage was changed to 200 volts.
On September 12, 1930, the National Government announced China's first voltage frequency standard in the form of a construction committee order, stipulating 220 volts and 50 Hz as China's standard voltage and standard frequency.
After the founding of the People's Republic of China, it is certainly good to save a little. Therefore, the "rated voltage and frequency standards" and "power supply rules" formulated many times are based on 220 volts.
So, is 110 volts safer than 220 volts?
In principle, the lower the voltage, the higher the natural safety. It has been calculated that the time required for 110 volts is indeed longer than 220 volts, and the difference is about 100 milliseconds in the time of the physiological and even fatal damage to the human body. But in fact, 110 volts and 220 volts are greatly exceeded. The range of safe voltages. In addition, when the electric shock is made, the actual size of the current is determined by the magnitude of the current, so whether it is dangerous or not depends on the electric shock environment.
Another issue that is very concerned by a small partner is:
Some common electrical appliances are used abroad, will there be problems due to voltage differences?
The common electrical appliances that belong to the same voltage system are used abroad, and the voltage is generally not a problem, because most electrical appliances have a 20% voltage fluctuation range such as an electric furnace, a rice cooker, etc., because sometimes the voltage is the highest in the country. It can also reach 250 volts, so the voltage of 230 volts just makes them heat up faster, without much problem.
For those electrical appliances that are more stringent and more expensive, even if they belong to a voltage system, it is recommended to use a travel transformer if the voltage is different, so as not to burn the appliance or affect the service life of the appliance.
If high-voltage electrical appliances are brought to countries with low voltages, such as China's 220 volt electrical appliances brought to the United States 110 volts environment, it is generally not available, even if it can barely be used, it is often delayed or like a bull. The use of features is greatly reduced.
However, in the context of globalization, some smart international companies may have noticed the difference in voltage between countries. Therefore, many of the designed electrical appliances have their own adaptive voltage, that is, they can be suitable for voltages from 110 volts to 240 volts, such as Haier. The floating range of the color TV is marked as: AC 90-260 volts, 50 Hz, so it can be used as usual at voltages of 90 to 260 volts. Of course, if you go abroad often, the general travel agency recommends that you go abroad to bring your own travel adapter and travel transformer.
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