The book "Theory and calculation of transformers of secondary power supply sources" under the authorship of Khnykov A. In. Co-authored with Shcheglov A. In. , by Ganul E. In. and Minaeva O. In. is an in-depth and comprehensive study dedicated to the most important element of the electrical infrastructure - transformers This edition will be especially useful for both students and professionals in the field of electrical engineering, electricity and related disciplines. The main purpose of the book is to provide readers with not only theoretical foundations of transformers, but also practical recommendations for their calculation and application in modern secondary power systems. Unlike many other textbooks, this edition focuses on current aspects of the design and operation of transformers, making it indispensable for professionals working in a rapidly changing technological environment. The book covers a wide range of topics, including the principles of operation of transformers, their classification, as well as methods for calculating basic parameters. The authors pay special attention to the reliability and efficiency of transformers in various operating conditions. Readers will be able to learn about the latest achievements in the field of materials science and technologies that affect the performance of transformers, as well as about modern approaches to their diagnosis and maintenance. Who is this publication intended for? First of all, it will be interesting for students of technical universities studying electrical engineering and energy . In addition, the book will be useful to practicing engineers and designers who are looking for relevant knowledge and techniques to improve the quality of their projects. It can also attract the attention of scientists and researchers engaged in the development of new technologies in the field of electric machines and transformers. The topics raised in the book concern not only theoretical aspects, but also practical challenges faced by specialists in their work. For example, the authors consider the influence of various factors on the efficiency of transformers, such as temperature regimes, loads and the quality of materials used. This makes the book particularly relevant in light of current energy efficiency and sustainability requirements. The style of the authors is distinguished by clarity and accessibility, which allows even complex technical concepts to be presented in an understandable form. Khnykov A. In. and his co-authors are known for their scientific works in the field of electrical engineering, and their experience allows to create a high-quality and informative publication. Among other well-known works of the authors are books on electric power and electric machines, which are also popular among students and specialists. If you are looking for literature that will help you to better understand the work of transformers and their role in modern power systems, then the "Theory and calculation of transformers of secondary power sources" will be a real find for you. This book will not only expand your knowledge, but also help you put it into practice, which is especially important in a dynamic industry. Do not miss the opportunity to immerse yourself in the world of electrical engineering and discover new horizons with this unique edition!