The book "Fundamentals of the theory of construction of measuring bodies of relay protection and automation" by B. L. Fabricanta is a unique and in-depth study in the field of electrical engineering and automation. This publication will become an indispensable assistant for students, graduate students and specialists working in the field of energy, as well as for all those who are interested in modern technologies of relay protection and automation. In his book, Fabrikant raises important questions regarding the design and operation of measuring bodies, which play a key role in ensuring the safety and reliability of electrical systems. The author shares his knowledge about the principles of relay protection, as well as how to choose and configure measuring devices for various operating conditions. The reader will be able to learn about modern approaches to the design and implementation of automated systems, which makes the book relevant for professionals seeking to remain at the forefront of technology. The book will be of interest not only to specialists, but also to students of technical universities who study electrical engineering, automation and related disciplines. It contains many practical examples, which makes it easier to absorb theoretical material. Students, graduate students and young professionals will find useful tips and recommendations in the book that will help them in their future professional activities. The topics raised in the book cover a wide range of issues: from the foundations of relay protection theory to modern methods of diagnosis and monitoring. The manufacturer focuses on the importance of reliability and safety of electrical systems, which is especially important in today's world, where technology is developing at an incredible speed. The book also addresses the issues of process automation, which makes it useful for professionals working in the field of management and optimization of production processes. The author's style is distinguished by clarity and accessibility of presentation, which allows the reader to easily perceive even the most complex concepts. In. L. Fabrikant is an experienced specialist and teacher who knows how to convey important ideas and principles to the reader. His previous works have also received recognition in professional circles, and this book will not be an exception. If you are looking for literature that will help you understand the intricacies of relay protection and automation, then “Fundamentals of the theory of construction of measuring organs of relay protection and automation” will be a real find for you. This book will not only expand your knowledge, but also inspire new ideas and projects. Readers interested in the topics of electrical engineering, automation, relay protection, as well as anyone who wants to deepen their knowledge in the field of modern technologies, will certainly find much useful in this publication. Do not miss the opportunity to get acquainted with the work of . L. A fabricant is not just a book, but a whole world full of knowledge and practical experience that will help you become a true professional in your field.