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Temperature dependence of epoxy resistance to PD

机译:环氧树脂对PD的温度依赖性

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摘要

In this paper are presented the results of a research program on comparative test procedures on epoxy materials, in the presence of internal partial discharges under varied thermal working conditions. These studies involved only two materials. New data on other materials, filled and unfilled, are presented and analyzed. The time to breakdown of specimens subjected to 25 kV sinusoidal voltage under different testing temperatures is examined. A modified version of the CIGRE test cell, Method I, is used to obtain specimens with an hemispherical internal cavity geometry between embedded electrodes. This arrangement permits very high signal to noise ratio values and thereby fully exploits the recent digital techniques based on pulse amplitude analysis and off-line treatment of recorded data. Finally, different discharge mechanisms, governing the aging activity of cavities at 20 and 80/spl deg/C respectively, were observed.
机译:本文介绍了在不同热工况下存在内部局部放电的情况下,对环氧树脂材料进行比较测试程序的研究程序的结果。这些研究仅涉及两种材料。呈现并分析了其他材料(已填充和未填充)的新数据。检查了在不同测试温度下承受25 kV正弦电压的样品的击穿时间。 CIGRE测试单元的改良版方法I用于获得在嵌入式电极之间具有半球形内部空腔几何形状的样品。这种安排允许很高的信噪比值,从而充分利用了基于脉冲幅度分析和记录数据的离线处理的最新数字技术。最后,观察到不同的放电机理,分别控制腔体在20和80 / spl deg / C下的老化活性。

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