The book "Elements of relay protection devices and automation of power systems and their design" by B. L. Fabricant is an important work in the field of electrical engineering and energy, which is aimed at specialists, students and anyone interested in modern technologies in the field of relay protection and automation of power systems. This edition will be a real guide for those who seek to understand more deeply the principles of operation and design of devices that ensure the reliability and safety of electrical networks. The book examines in detail the key elements of relay protection and automation, which play a critical role in the functioning of power systems. The author, possessing rich experience and deep knowledge in this field, offers readers not only theoretical foundations, but also practical aspects of the design and implementation of such systems. The reader will be able to learn about the different types of relays, their purpose, principles of operation and methods of tuning. Each chapter is filled with examples and illustrations, which makes it easy to learn complex concepts and apply them in practice. Who can like this book? First of all, it will be of interest to students of technical universities studying in specialties related to electrical engineering and energy . It will also be useful to engineers and specialists working in the field of design and operation of energy systems. People seeking to upgrade their skills or master new technologies will find a lot of useful information in this publication. In addition, the book can attract the attention of researchers dealing with the reliability and safety of power systems. The topics raised in the book cover a wide range of issues related to relay protection and automation. The author focuses on the importance of reliability and performance of protective devices, which is especially important in the conditions of modern energy consumption. Aspects of the integration of new technologies, such as digital relays and automation systems, which are becoming more common in modern power systems are also considered. In. L. Fabrikant emphasizes that the effective design and implementation of such systems requires a deep understanding of both the theoretical foundations and practical skills. The author's style is distinguished by clarity and logical presentation, which makes the material accessible to perception. In. L. Fabrikant is not only the author of this book, but also a recognized specialist in the field of electrical engineering, who has many publications and scientific works behind him. His experience and knowledge make this book a valuable source of information for anyone who wants to be aware of the latest advances in relay protection and automation. If you are looking for literature that will help you understand the complex aspects of the design and operation of power systems, “Elements of relay protection devices and automation of power systems and their design” will be an excellent choice. This book will not only enrich your knowledge, but also inspire new ideas and solutions in your professional activities. Do not miss the opportunity to immerse yourself in the world of modern technologies and discover new horizons in the field of electrical engineering!