The textbook was prepared in accordance with the requirements of the Federal State Educational Standard of Secondary Vocational Education in the specialties of the enlarged group "Mechanical Engineering," including specialties from the list of TOP-50. The educational publication can also be used to implement secondary vocational education programs in the specialties "Maintenance and repair of engines, systems and assemblies of cars" and "Operation and repair of agricultural machinery and equipment" (from the TOP-50 list). The textbook is designed to study the general professional discipline "Electrical Engineering and Electronics."