Dry Type Transformer

The demand of electricity in India has been increasing rapidly in the last few years. There is a mushroom growth in the high rise buildings, shopping areas, CNG and petrol stations, residential colonies, etc. Due to the scarcity of space in cities, installation of conventional oil type transformers in such congested and populated areas is always a big safety risk. The developed as well as many developing countries are installing dry type transformers as a solution for ensuring safety in such scenarios.

There are primarily two main manufacturing techniques for dry type transformers; Cast Resin and Vacuum Pressure Impregnated (VPI) with their own typical features. The main difference is their insulation class; Cast Resin is Class F (155°C) and VPI is Class H (180°C). The Vacuum Pressure Impregnated transformers not only offers in-build safety feature but there are many other advantages of using these transformers such as improved reliability, reduced losses, minimal maintenance, enhanced overloading capability etc.