DOI: https://doi.org/10.15588/1607-6761-2015-1-3

METHOD FOR THE TEMPERATURE DETERMINATION OF HIGH СURRENT CONTACTS SURFACE DURING THE SWITCHING PROCESS

O. G. Volkova

Abstract


The article describes the method of temperature determination of the electrical contact surface, which works without electrical arc in AC circuits. Pictures of contact surfaces damage are shown. It indicates that the temperature rises above the melting point of the contact material and there is disagreement in use of the temperature calculation methods. The temperature determination is based on the numerical solution of the boundary inverse heat conduction problem. The regularized solutions are done with the help of quasi-inversion method. The feature of the method is the temperature determination from the experimental temperature values obtained at points available for measurement. Calculation of the contact surface temperature as a function of time is obtained. The calculation is made using the program «MathCAD». The resulting temperature obtained by this method is more accurate than using previously known methods

Keywords


electrical contact; the temperature; the problem of heat conduction; the contact surface; switching

References


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Address of the journal editorial office: Editorial office of the the scientific journal "Electrical Engineering and Power Engineering", Zaporizhzhia National Technical University, Zhukovskiy street, 64, Zaporizhzhia, 69063, Ukraine. phone: +38-061-769-82-96 – the Editing and Publishing Department. E-mail: rvv@zntu.edu.ua