The book "Modern test devices for relay protection and automation", written by a team of authors, is a unique and valuable source of knowledge for specialists in the field of electrical engineering, energy and automation. This publication not only highlights the current aspects of test devices, but also immerses the reader in the world of modern technologies that play a key role in ensuring the reliability and safety of electrical systems. In today's world, where energy systems are becoming more complex and multifaceted, the need for reliable relay protection and automation is increasing every day. The book offers readers an in-depth understanding of the operating principles of test devices, their purpose and application in various fields. It covers a wide range of topics, including relay protection testing methods, modern technologies and equipment, as well as trends that shape the future of this field. This book will be especially interesting for electrical engineers, relay protection specialists, as well as students of technical universities studying electrical engineering and automation. Readers who are passionate about new technologies and strive to improve their skills will find many useful materials and practical recommendations in it. The book will also be useful to project managers and managers working in the energy sector, as it highlights the key aspects that need to be taken into account when choosing and implementing test devices. One of the main topics raised in the book is the importance of reliability and safety of electrical systems. The authors emphasize that modern test devices not only help to identify potential problems, but also contribute to improving the overall efficiency of energy facilities. With the constant growth of electricity demand and the increasing load on the grid, protection and automation issues are becoming especially relevant. The style of presentation in the book is clear and accessible, which allows even those who are not experts in this field to easily absorb information. The team of authors, consisting of experienced practitioners and scientists, shares their knowledge and experience, which makes the material not only theoretically sound, but also practically applicable. The book contains examples from real practice, which helps the reader to better understand how to apply the knowledge gained in their work. In addition, “Modern test devices for relay protection and automation” may be of interest to those who are engaged in scientific research in the field of electrical engineering. The authors consider the latest achievements and innovations that may affect the development of technologies in the future. This allows readers to keep abreast of the latest trends and discoveries, which is especially important in the rapidly changing world of technology. If you are looking for a book that will help you deepen your knowledge in the field of relay protection and automation, as well as introduce you to modern test devices, this edition will be an excellent choice. It will not only expand your horizons, but also equip you with the necessary knowledge to successfully work in this dynamic and important field. Don’t miss the opportunity to learn about the latest developments and trends that are shaping the future of energy and automation.