Why Do Low Voltage Pole Mounted Circuit Breakers Use Ac Power?

Lv Pole Mounted Circuit Breakers Why is AC used? We need to start with my country's power system. In fact, there are areas where DC is used in our power. For example, Sanshan Hydropower Station.

Then my country's power system generally uses AC, so high-voltage vacuum circuit breakers must also be AC ​​vacuum circuit breakers. The earliest transmission lines in human history were DC. At the beginning, the transmission voltage was only 100V, and then it was gradually increased to 6kV in 1885. However, it is difficult to manufacture high-voltage and high-power DC generators, and it is impossible to directly boost DC, and long-distance transmission requires high voltage. This limits the development of DC transmission. On the other hand, three-phase AC generators and transformers were invented in the late 1880s, especially the invention of induction motors with simple structure, reliable operation and low price, and the application scope of AC was further expanded. In line with this situation, AC transmission has made great progress.

After reading the above introduction, I believe everyone understands why outdoor vacuum circuit breakers use AC!