• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.6
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• pp.50-56
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• 1997

As the purpose of the breakdown prediction of three degradation of insulating materials caused by partial discharge occurring at various defects in the polymer insulator itself and at the interfaces between electrodes and the insulating materials. Treeing due to partial discharge os one of the main causes of breakdown of the insulating materials. Recently, the necessity of establishing the way to diagnoses the aging of insulation materials and to predict of insulation breakdown become improtant. The purpose of our work are to use acoustic emission System and fractal dimension and to investigated the treeing phenomena in polymeric insulation under appliec AC voltage 11[kV] with an artificial needleshaped void(1.5[mm]) using the above system.