Types of Dry Type Transformer
A dry type transformer is one that does not use liquid coolant or oil to cool the core and windings. Instead, it uses air, gas or vacuum pressure to cool the transformer. They have become increasingly popular because they offer several advantages over oil-cooled transformers. Among these advantages is the fact that they are safer, easier to install and maintain, and are less prone to fire hazards.
There are two main types of dry type transformers: cast resin transformers and vacuum-pressure impregnated (VPI) transformers.
1. Cast Resin Transformers
A cast resin transformer is a type of dry type transformer that is constructed with an epoxy resin that is cast around the primary and secondary windings. This helps protect the windings from damage and creates a barrier between the windings and the environment. Cast resin transformers can be used in a range of applications, from residential homes to heavy industries.
Some of the advantages of cast resin transformers include being highly resistant to moisture, high temperature and chemical damage. They are also highly resistant to fire and can withstand extreme environmental conditions. Additionally, they are lightweight and easy to install.
2. Vacuum-Pressure Impregnated (VPI) Transformers
VPI transformers are a type of dry type transformer that uses a vacuum and pressure process to impregnate the windings with epoxy resin to provide insulation. This type of transformer is highly reliable, efficient, and has a long service life. VPI transformers are used in several applications, including commercial, residential, and industrial.
VPI transformers have several advantages over oil-filled transformers, including being safe, more efficient, and easy to maintain. They also produce less noise and vibration, and require less maintenance than oil-filled transformers.
Conclusion
Dry type transformers offer many advantages over oil-filled transformers. They are safer, less prone to fire, and easier to install and maintain. Two popular types of dry type transformers are the cast resin transformer and the VPI transformer. Both types have distinct benefits and can be used in various settings. The choice of the type of dry type transformer depends on the specific application requirements and needs.
