Transformers play an important role in many electrical systems by changing electrical voltage levels. A Certificate III Electrician course can provide students with an introduction to testing and connecting transformers. Learning about transformers gives students the opportunity to apply electrical theory to real equipment and understand the relationship between electrical and magnetic principles. AITE includes UEEEL0025, which focuses on testing and connecting transformers. This forms part of the wider course structure, which also includes magnetic devices, AC machines and electrical circuits. Together, these subjects provide students with a broader understanding of electrotechnology equipment.