This book includes the most complete background information on the technique of high yarns and gives an up-to-date understanding of it. It covers physical phenomena acting in insulation systems, and factors affecting its performance, as well as actual means of assessing the effectiveness of insulation and their application in creating technical characteristics. In addition, the book discusses the design, selection and testing of high-voltage power equipment and their maintenance. The emphasis is on how to cope with situations that may arise during the operation of high-voltage power equipment.