What are the performance and structural characteristics of the transformer?

In the past 20 years, with the development of the world economy, dry change has achieved rapid development all over the world, especially in distribution transformers, the proportion of dry change is increasing. According to statistics, in developed countries such as Europe and the United States, , it has accounted for 40 to 50% of the distribution transformer. In my country, it accounts for about 50%. From the perspective of output, the output of dry-type transformers has increased significantly since the second urban network transformation meeting in 1989. Since the 1990s, it has increased at a rate of about 20% every year. Production has approached 10,000 MVA (a value that has greatly exceeded the forecast of 4,500 MVA 10 years ago), while the total production in 2002 reached 20,000 MVA in 2004 and reached 32,000 MVA. Such a growth rate is unprecedented in the world.

transformer

From the above data, it can be seen that my country has become one of the countries with the largest production and sales volume of dry-type transformers in the world, and is already at the world‘s leading level in terms of factory scale, product capacity, and voltage. structure type

Structural performance Solid insulation encapsulated winding does not encapsulate the winding. Among the two windings, the higher voltage is the high voltage winding, and the lower one is the low voltage winding. From the relative position of the high and low voltage windings, the high voltage can be divided into concentric overlapping concentric The type winding is simple and convenient to manufacture, and this structure is adopted. Overlapped, mainly used for special transformers.

Safe, fireproof, non-polluting, can run directly in the load center; using domestic advanced technology, high mechanical strength, strong short-circuit resistance, small partial discharge, good thermal stability, high reliability, long service life; low loss, low noise , obvious energy-saving effect, maintenance-free; good heat dissipation performance, strong overload capacity, can increase capacity operation when forced air cooling; good moisture-proof performance, suitable for operation in high humidity and other harsh environments; dry-type transformers can be equipped with perfect temperature detection and Protection System. Using intelligent signal temperature control system, it can automatically detect and display the respective working temperatures of the three-phase windings, automatically start and stop the fan, and have functions such as alarm and trip settings; small size, light weight, small footprint, and installation costs Low.