This paper investigates electrical breakdown of interconductor insulation, which presents an obstacle to the increase of the rated voltage of electrical machines as a means to improve efficiency of electrical energy exploitation. We have investigated a large number of samples searching for weak points in interconductor insulation along the coil of a high voltage asynchronous machine. The experiments were performed on lacquer-glass-glass-lacquer conductor insulation. Location of weak points and breakdown voltage levels have been determined.
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Vereb et al. (2007) studied this question.
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