Comprehensive Guide to Three-Phase Transformers

This course covers the comprehensive understanding of three-phase transformers, their construction, connections, and applications. It starts with the Sumpner test, a method to determine the equivalent circuit parameters of transformers. The course then explores the two types of three-phase transformers: a bank of three single-phase transformers and a three-phase transformer as a single unit. It further explains the marking of transformer terminals, the connection of primary coils in a star, and the calculation of line-to-line voltage. The course also discusses the concept of transformer connections and vector groups, the importance of maintaining phase sequence, and the concept of balanced three-phase transformers. It concludes with the impact of third harmonic flux and currents in three-phase transformers.