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Manufacture of porcelain insulators from locally available materials
Electrical Engineering ( IF 1.8 ) Pub Date : 2020-05-05 , DOI: 10.1007/s00202-020-00998-5
C. S. Onodu , T. C. Madueme

This study discusses the local production, electrical characteristics and performance in service of porcelain insulators for outdoor low-voltage apparatus. Concern was given to the identification, beneficiation, characterization and utilization of locally available raw materials in Nigeria for the production of electrical porcelain insulators, taking benefits of the availability of these raw materials. The process control presents figures, tables, simulations. The basic raw materials were separately prepared using a 200-µm sieve. The composition of the triaxial constituents was varied to produce samples for testing. Altering the percentage content of silica and the alumina recorded a change in the mechanical strength and the sintering temperature; this was handled by adding fluxes suitable for improving tensile strength without increasing sintering temperature of the paste. Porcelain slab samples of different triaxial composition were formed. Tests on mechanical resistance, porosity and water absorption were carried out. Sample A, with specific percentage composition of 38% feldspar, 18% quartz, 32% kaolin and 12% ball clay, was used to produce porcelain suitable for the 480 V pin insulators. The produced sample possess an electrical dielectric constant of 9.80, a dissipating factor of 0.060, flashover voltage of above 5 kV all at 50 Hz of supply voltage frequency and a mechanical load support of 13.85 kN.

中文翻译:

用当地可用的材料制造瓷绝缘子

本研究讨论了户外低压电器用瓷绝缘子的本地生产、电气特性和使用性能。对尼日利亚当地可用原材料的识别、选矿、表征和利用,以生产电瓷绝缘子,利用这些原材料的可用性受到关注。过程控制呈现数字、表格、模拟。使用 200 µm 筛子分别制备基本原料。改变三轴成分的组成以生产用于测试的样品。改变二氧化硅和氧化铝的百分比含量记录了机械强度和烧结温度的变化;这是通过添加适用于提高抗拉强度的助熔剂来处理的,而不会增加焊膏的烧结温度。形成了不同三轴组成的瓷板样品。进行了机械阻力、孔隙率和吸水率的测试。样品 A 具有特定百分比组成的 38% 长石、18% 石英、32% 高岭土和 12% 球粘土,用于生产适用于 480 V 针式绝缘子的瓷器。所生产的样品具有 9.80 的电介电常数、0.060 的耗散因子、50Hz 以上的电源电压频率和 13.85kN 的机械负载支撑,均具有 5kV 以上的闪络电压。具有特定百分比组成的 38% 长石、18% 石英、32% 高岭土和 12% 球粘土,用于生产适用于 480 V 针式绝缘子的瓷器。所生产的样品具有 9.80 的电介电常数、0.060 的耗散因子、50Hz 以上的电源电压频率和 13.85kN 的机械负载支撑,均具有 5kV 以上的闪络电压。具有特定百分比组成的 38% 长石、18% 石英、32% 高岭土和 12% 球粘土,用于生产适用于 480 V 针式绝缘子的瓷器。所生产的样品具有 9.80 的电介电常数、0.060 的耗散因子、50Hz 以上的电源电压频率和 13.85kN 的机械负载支撑,均具有 5kV 以上的闪络电压。
更新日期:2020-05-05
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