Abstract
The relevance The work is devoted to assessing the impulse overvoltages effect at the input of the supply cable on the asynchronous machines technical resource as a solution to the electrical equipment failure problem caused by the resource loss. Aim of research Reducing the asynchronous machines accident rate by monitoring their technical condition and the implementation of electrical equipment riskbased maintenance during impulse overvoltages. Research methods The asynchronous electric motor, a supply cable, lightning effects and surge arrestor simulation modeling was used; Fourier analysis was applied. Results The simulation model of electric motor supply system section with installed surge arrestors in transformer substation cells was developed. Spectral composition of input voltage and current of asynchronous machine depending on cable line length was obtained. Assessment of technical resource of asynchronous machine based on voltages and currents oscillograms on its input and the related value of energy transmitted to its insulation during impulse overvoltages was realized.
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