Brief introduction to the development history of vacuum circuit breaker

Vacuum circuit breaker is a device for controlling power supply and protecting electrical appliances. As a new generation of safe power supply device, it has many advantages, such as small size, light weight, frequent operation in practical application, and arc extinguishing without maintenance. Because of these advantages, it is widely used in distribution network. It has so many benefits, so what is its development process? Let Bian Xiao elaborate.

As a vacuum circuit breaker, as the name implies, its arc extinguishing medium and insulating medium are both high vacuum. To say its development, we have to start with 1893. At that time, Rittenhouse, an American, obtained a patent, that is, he put forward the concept of vacuum interrupter. The vacuum switch in 1920 is made by Swedish Foga company.

Vacuum circuit breaker

Then it is proved that it is possible for 1926 to break the current in vacuum. Due to the lack of breaking capacity and the limitation of vacuum technology and vacuum materials, this research result can not be applied to practice.

After that, vacuum technology developed to a certain extent, and because of this, in the 1950s, the United States made a vacuum switch, which can effectively cut off the capacitor bank. However, as the first batch of finished products, its breaking current capacity is only 4 kA.

Vacuum circuit breaker

With the continuous improvement of smelting technology related to vacuum materials and the major breakthrough of contact structure of vacuum switch, the situation has changed. 196 1 year, the breaking current level of vacuum circuit breaker increased to12.5ka. Then products like 26kA, 310.5ka were successfully made in 1966.

Vacuum circuit breaker

In the 1980s, the device had the breaking capacity of 100 kA. China began to develop this kind of vacuum switch in 1958, and successfully developed a product with 600 A breaking capacity in 1960. With the passage of time, higher-level circuit breakers have been continuously developed.

Vacuum circuit breaker

Above we introduced the development course of vacuum circuit breaker, which can be said to be very difficult. The research and development of any new product is obtained after numerous failures. We know that this kind of products are currently used in many fields, and their good performance can also bring us great use value, so such research is worthwhile.

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