The choice of current system for electric railways of the USSR . Issue. 1. Condenser Engines is a unique publication that immerses the reader in the world of electric transport and its technologies. Created by a team of authors, this work is the first issue of a series devoted to the most important aspects of the design and operation of electric railways, as well as the specifics of the use of condenser engines. The book focuses on the choice of current system for electric railways, which is a key issue for engineers and designers in the field of railway transport. The authors consider in detail the various power supply systems, their advantages and disadvantages, as well as the impact on the efficiency of rolling stock. At the same time, special attention is paid to capacitor engines - their design, principles of operation and application in the conditions of the Soviet railway network. This book will be of particular interest to specialists in the field of electrical engineering, engineers, students of specialized universities, as well as everyone who is interested in the history and development of railway transport in the USSR. Readers interested in the topic of electric transport will find in it a lot of useful information that will help to better understand the features of the design and operation of electric railways. The topics raised in the book cover not only technical aspects, but also historical contexts, making it a valuable source of knowledge for researchers and historians. The authors focus on how the choice of current system affects the performance of railways, as well as the economic aspects associated with the use of various technologies. This makes the book relevant not only for engineers, but also for economists involved in the transport industry. The style of writing of the authors is distinguished by clarity and accessibility, which allows even those who are not specialists in the field of electrical engineering to easily assimilate the presented material. The book uses illustrations and diagrams that help visualize complex technical concepts and make reading more fun. This approach contributes to a better understanding and memorization of information, which is especially important for students and novice professionals. The book "Choosing a current system for electric railways of the USSR" is not just a textbook, but also a real encyclopedia of knowledge, which will become an indispensable assistant for everyone who wants to deepen their knowledge in the field of electric transport. It can serve as a basis for further research and development, as well as inspire new ideas in the design and operation of electric railways. If you are looking for literature that combines technical depth and historical significance, then this edition will be an excellent choice. It can be interesting not only for professionals, but also for amateurs who want to expand their horizons in the field of electric transport. The book opens new horizons for understanding the complex processes taking place in the world of electric railways, and certainly deserves the attention of anyone interested in this topic.