Dry-type transformers have the advantage of low noise

Dry-type transformers need to have a low noise level, need to be compact and have a lower weight to minimize the use of space, can be used exclusively for production activities. In many countries, users and specifiers have switched to encapsulated and open-type dry-type transformers as their desired solution. In Europe, some manufacturers have offered cast resin technology using Class B or Class F insulation systems. Many of the regions in Asia, including China and South Korea, have adopted this technology from Europe. However, these 11kv dry type transformer in the use of a decade later, its inherent limitations are becoming more users are more concerned about the problem. Increasing overload, environmental protection material requirements and long-term reliability have become disadvantages of these lower temperature solutions. Strict requirements can lead to cracking of large pieces of resin and accelerate the aging of materials, which will be less than 10 years time premature failure.