This bilingual book conveys the fundamentals, structure, manufacturing, and testing knowledge of medium-voltage distribution transformers, as well as project planning guidelines. Medium-voltage distribution transformers are used in utility companies and in industry. Additionally, the new edition takes into account adjustable local network transformers, which are in demand due to the energy transition with many decentralized feed-ins. Most engineers in practice seek concise, detailed information on such equipment to prepare for international tenders or inspections. This book also considers that transformers in the Anglo-Saxon world differ significantly from those in German-speaking regions.