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Non-pressurized air is extensively used as basic insulation medium in medium/high voltage equipments. An inherent property of air-insulated design is that the systems tend to become physically large. Application of dielectric barrier can increase the breakdown voltage and therefore decrease the size of the equipment. In this paper, the impact of dielectric barrier on breakdown voltage enhancement...
The air-polyimide surface insulating system is regard as the weak point in high frequency power transformer, since the surface breakdown strength of the dielectric is much lower than its bulk breakdown strength. However, it still remains unclear regarding the deterioration mechanism of air-polyimide surface insulating system under high frequency sinusoidal voltage. In this paper, surface discharge...
Surface discharge on the oil-pressboard interface is considered to be serious fault condition. This phenomenon leads to the formation of a conducting path on the surface of an insulation material as a result of surface currents. The surface current is effectively the drift of charge under the action of an electric field which may be either the general electric field or a locally enhanced field developed...
A model has been developed of the surface-recorded motor-unit action potential (MUAP) in terms of the gross anatomical properties of the motor unit. The MUAP is modeled as arising from six current sources (two tripoles). To account for the distribution of fibers and endplates, each current source is diffused throughout a volume defined by the motor unit's cross section and the length of the endplate...
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