ANALYSIS OF THE CONDITION OF USED TRANSFORMER OIL IN SWITCHES OF ENERGY SUPPLY SYSTEMS OF METALLURGICAL ENTERPRISES

Abstract

In the global practice of electrical apparatus construction, special attention is paid to the issue of operational efficiency. To compensate for the loss of kinetic energy spent on switching processes, the leading companies "Poertech Corporation" USA, "Hundai" (Republic of Korea), India, China, "Reinghausen", "AEG" (Germany), "Ferranti" (Italy), "ACEA" (Sweden), "VIT" (Ukraine) use periodic or continuous purification of transformer oil or use materials that do not form by-products during combustion in the form of particles of different dispersion. The desire to increase the service life of switches leads to a redistribution of the role of mechanical and electrical influence on structural elements. Therefore, the study of mechanical damage to parts, the conditions of their occurrence and the regularity of their development acquires an important importance in the development of the concept of management of processes characteristic for the operation of the investigated equipment. The variety of types of particles of contamination of the working environment, the conditions of their occurrence and development, are regulated by factors of external mechanical action in the commutation zone. The main features of the factors that determine the nature, quality and speed of commutation when mechanical, physical and chemical processes occur at high temperatures in switches include: the use of dissimilar materials, conditions, the type and nature of mechanical interaction, the presence of a high density current, etc. In the process of operation of high-voltage switches, the geometry of the surfaces of the contact nodes undergoes significant changes. Kinematic calculation of switching contact details is usually carried out at the design stage for surfaces with ideal geometry, without taking into account subsequent operational changes. In many works, it is noted that damage to the surface layer is a structurally sensitive characteristic of materials. This is what determines the metallurgical approach to the study of contact processes of metal surfaces.