Pavlenko T. Development of the Theory of Enhanced Arc Resistance of Electric Contacts for Commutation Electric Devices

Object of study - the electrical contacts and the physical processes that occur in their work; the purpose of the study - rationale and development of the theory of basic processes and phenomena and creating compositions contacts for switching electrical devices; methods of research - scientific and theoretical study of the properties and compatibility of elements composition of electrical contacts, based on the provisions of scientific theories and research methods as elements, and composition of electrical contacts; theoretical and practical results - performance research of electrical contacts at the test facilities and the construction of electrical switching apparatus and a manufacturing technology contact compositions with special thermionic properties that promotes resurs without the use of toxic and harmful elements of contact nodes; novelty - Methods of research of electrical contacts and their physical and chemical properties that affect the wear resistance of contacts by reducing the work function of electrons from the working surface contacts, development of complex physical models, which were scientific basis of the theory of basic physico-chemical processes and phenomena, leading to decreased erosion of working surface contacts and a model showing the factors affecting the reduction eroziyiyi surface and movement of the arc, the development and implementation of a mathematical model of arc, which linking parameters of electric and thermal fields of physical and chemical phenomena that determine; the performance of contact system, the scope of application, in the educational process in the investigation and calculation of contact nodes; the degree of implementation - using contacts in switching devices voltage up to 1000V (plants "Elektrovazhmash, KHEMZ , JSC "electric machine", Kharkiv).