Analysis of Development Trend of Foreign High-voltage Vacuum Contactors

In the early days, foreign vacuum contactors only had electricity to maintain. In the future, according to market needs, mechanical locking mechanisms were installed. The insulating frame is made of the best unsaturated polyester material; the contact material is CuW alloy; the vacuum interrupter is mostly a sealing process. Its stable performance, compact structure, light weight, beautiful appearance, and at the same time the external dimensions of the school compared to China developed in the 1970s 3 ~ 6kV high-voltage vacuum contactor, after the development of vacuum contactor boom rise in the country, many manufacturers or the introduction of High-voltage vacuum contactor, the structure of the upper and lower layout and front and rear layout, with locking mechanism, rated voltage 3.6kV, 7.2kV, 12kV, rated current 250A, 400A, 630A.

The world's first high-voltage vacuum contactor was successfully developed by British GEC in 1965. The structure is a front-to-rear arrangement. The rated voltage is 6kV and the rated current is 400A. In the mid-1990s, Siemens AG of Germany developed a series of 3TL8 high-voltage vacuum contactors with a structure of up and down layout, rated voltage of 7.2kV and rated current of 400A. In the early 1990s, ABB launched a ZVC high-voltage vacuum contactor with left and right structure, with a rated voltage of 12 kV and a rated current of 400 A. It is mainly used in F-C circuit switch cabinets.

In the early days, foreign vacuum contactors only had electricity to maintain. In the future, according to market needs, mechanical locking mechanisms were installed. The insulating frame is made of the best unsaturated polyester material; the contact material is CuW alloy; the vacuum interrupter is mostly a sealing process. Its stable performance, compact structure, light weight, beautiful appearance, and at the same time the external dimensions of the school compared to China developed in the 1970s 3 ~ 6kV high-voltage vacuum contactor, after the development of vacuum contactor boom rise in the country, many manufacturers or the introduction of High-voltage vacuum contactor, the structure of the upper and lower layout and front and rear layout, with locking mechanism, rated voltage 3.6kV, 7.2kV, 12kV, rated current 250A, 400A, 630A.