Development of modular transformers in the coming years

Nowadays, the reconstruction of the urban network requires high-voltage direct access to the urban areas, substation equipment into the load center, electrical energy transmission through underground cables, and distribution equipment in harmony with the surrounding environment. At the same time, it is required that the power distribution equipment be safe, reliable, and of high performance (ie, low loss, low noise, high short-circuit resistance strength), the volume tends to be miniaturized, installation and use are simple, maintenance-free or less maintenance. Combined transformer is such a new type of distribution equipment.

The combined transformer is a transformer that combines the transformer body, switchgear, fuses, tap switches and corresponding auxiliary equipment. In the early 1990s, modular transformers were introduced into the United States from the United States (commonly known as American box changes in China).

Due to its advantages of compact structure, quick installation, flexible operation, safety, reliability, simple maintenance, and green environmental protection, it is rapidly accepted by the majority of power supply departments and users.

So far, about 2,000 American boxes have been operating in the power grids of dozens of cities in China. Their operating conditions are good. However, due to the fact that the U.S. power supply system and transformer technology standards are quite different from those in China, coupled with the price impact, U.S.

At present, China's combined transformer has a rapid development. There are nearly 100 domestic manufacturers of modular transformers that can be produced in small quantities, and there are dozens of related parts and components manufacturers.