Abstract
Enhanced machine reliability through monitoring of its state of health is an emerging field of research. Ingress of contaminants such as moisture can effect electrical machine state of health and contribute to failure in winding insulation. This paper demonstrates the application of an online insulation health monitoring method to study the effect of moisture ingress on ground-wall insulation through practical experiment. The method, based on real-time high-frequency leakage current measurement, is implemented on a 2.83 kW machine during operation in open-loop configuration. The results are presented and discussed, demonstrating the feasibility of diagnosis of moisture ingress.
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