碎石在电气系统中作为安全元件时绝缘性能的研究

[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials Pub Date : 1991-07-08 DOI:10.1109/ICPADM.1991.172305

V. Silverio, M.R. Scoralick, C. Portela

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引用次数: 0

摘要

作者研究了巴西变电站在电力系统最重要的频率范围内(从正常条件到与大气放电相关的瞬态)通常使用的碎石类型的有效绝缘性能。测量考虑了材料的几种湿度。浸渍水电阻率的影响在实际发现的雨水电阻率范围内进行了评价。在所调查的频率范围内，只有材料完全浸入水中的情况下的电阻率值低于3000 ω -m，这是巴西公用事业公司在其项目中普遍采用的

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Investigation of insulating properties of crushed-stone on the conditions it should perform as a security element in electrical systems

The authors investigate the effective insulating properties of the types of crushed stones usually employed in Brazilian substations in the frequency range of the most important occurrences at electric power systems (from normal conditions to transients associated with atmospheric discharges). The measurements consider several humidities of the material. The influence of impregnating water resistivity is evaluated in the range of values actually found for rain water. In the frequency range investigated, only the values found for the condition of entire immersion of the material into water presented values of resistivity lower than 3000 Omega -m, which is generally adopted by the Brazilian utility companies in their projects.<>

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[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials

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