What should we know about dry-type transformers
As an essential part of the power transmission link, the transformer has always played a huge role. Dry transformer is widely used because of its good performance characteristics. In the last article, we briefly introduced several aspects of dry transformer, and now we continue to study dry transformer deeply.What is the application status of dry-type transformer?
Dry-type transformer because of no oil, there is no fire, explosion, pollution and other problems, so the electrical specifications, regulations do not require the dry transformer to be placed in a separate room. Loss and noise are reduced to a new level, and the transformer and low-voltage screen in the same distribution room to create conditions. China's annual output of resin insulated dry transformer has reached 10,000 MVA, making it one of the countries with the largest production and sales volume of dry transformer in the world. Dry transformers are now widely used in almost all electrical power plants, factories, hospitals, etc. With the promotion and application of SC (B) 9 series with low noise (the noise of distribution transformers below 2500kVA has been controlled within 50dB) and energy saving (no-load loss reduced by 25%), the performance index and manufacturing technology of The dry-type transformers in China have reached the world's advanced level.
What requirements should the qualified dry-type transformers meet?
1.The shell protection level of the transformer and the LV power distribution cabinet shall not be less than IP3X, and not less than IP2X when installed separately
2.Iron core, with no spark discharge trace on the casing surface.
3.annular tubes, insulator outside without damage, crack.
4.The transformer winding pouring body is free of cracks and attached dirt.
5.Iron core, casing surface without serious sewage accumulation phenomenon.
6.The transformer sound is normal.
Structural characteristics of the dry-type transformer
1.Safe, fire prevention, pollution-free, can run directly in the load center.
2.Using domestic advanced technology, high mechanical strength, strong short-circuit resistance, small local discharge, good thermal stability, high reliability, long service life.
3.Low loss, low noise, energy-saving effect is obvious, maintenance-free.
4.Good heat dissipation performance, strong overload capacity, forced air cooling can improve the capacity of operation.
5.Good moisture-proof performance, adapt to high humidity and other harsh environment operation.
6.Dry-type transformers can be equipped with a perfect temperature detection and protection system. The intelligent signal temperature control system, can automatically detect and circuit display the respective working temperature of the three-phase winding, can automatically start and stop the fan, and have alarm, trip and other functions set.
7. Small volume, light weight, less space and low installation cost.
At present, the domestic production of dry transformer technology has been very mature and advanced, the price of dry transformer is generally between $18,670 and $28.722. The price range fluctuates with the impact of product raw materials, production technology, and market supply and demand requirements. So for dry-type transformer process production level and production strength, domestic has many very good suppliers, such as SHZ Power is a professional Chinese dry-type transformer manufacturers, if you want to know more about dry-type transformer, want to find high quality dry-type transformer, welcome to send E-mail query at any time.
