This talk covers broad rules and guidelines for the design of transformers. In addition to describing important design principles and operational aspects, intricate considerations while choosing materials, and types of magnetic circuits and windings are elaborated. Conflicting requirements while choosing various design parameters are enumerated. Advanced numerical tools like the Finite Element Method need to be routinely used these days for estimating performance parameters accurately and for reliability enhancement. Insulation design and optimization can be tricky and the issues thereof are highlighted. Ensuring adequate short-circuit strength is an important design aspect that requires the deployment of complementary manufacturing practices. Power and distribution systems are increasingly becoming complex, and transformers need to be designed accordingly. The talk will end by enumerating challenges in transformer engineering, which include the requirements to make transformers green and efficient in emerging smart grids with increasing penetration of renewable energy sources. Speaker(s): Dr. S. V. Kulkarni, Virtual: https://events.vtools.ieee.org/m/383940