This book is one of the "Distribution Network Practical Training Technology Series". This book is divided into 14 chapters. It provides a relatively comprehensive explanation and explanation of equipment overview, construction technology and acceptance, equipment naming and use, operation and maintenance, equipment defects and hidden danger management, equipment operation, maintenance, equipment fault handling and case analysis. It is also equipped with a large number of pictures and technical tables, which is easy to understand, explains the profound things in simple terms, is simple and practical. The whole book is based on practical application, combined with technical standards and relevant personnel's knowledge and requirements, and has strong guiding significance for front-line production workers.