dry-type transformer is a type of distribution transformer that does not use oil as a cooling and insulating medium. Instead, it uses solid materials such as epoxy resin, silicone rubber, or nomex paper. dry transformer has many benefits over oil-filled transformer, such as environmental friendliness, fire safety, low maintenance, and high reliability. In this article, we will explore the uses, workings, and benefits of dry-type transformer and see who needs to buy it.