The use of high voltage

① AC commercial power was invented by Tesla in the United States. At the beginning, the generator was only 1 10V, and the insulation was only 1 10V. At that time, several countries close to America adopted this system. With the popularization of use, the disadvantages of adopting 220 system outweigh the advantages.

② In Europe and China, there are already 220 alternators and adequate insulation levels when using AC motors, so 220 systems are developed in these countries.

(3) As the above brother said, the 220 system is more energy-saving than the 1 10 system.

While electric energy is regarded as non-energy storage energy, there is basically no power shortage in countries using 1 10 system like China, so this kind of power waste can be completely ignored.

At that time, there was a joke: Please turn off the lights in China and turn on the lights in the United States.