Let's identify all the key parts of a substation by inspection: transformers, voltage regulators, lightning arresters, reconnectors, fuses, etc. We'll look at a few examples. Full edX course with interspersed practice problems to help you learn: https://www.edx.org/learn/electricity/the-national-university-of-singapore-electricity-distribution Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore. https://www.ece.nus.edu.sg/stfpage/eleadj Video filmed and edited by Cheryl Lim. @randomcheryl