Improved methods of test for the insulation of electrical equipment
Improved methods of test for the insulation of electrical equipment
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改进的电气设备绝缘测试方法
DOI：
10.1049/pi-2a.1953.0040
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发表时间：
1953
期刊：
影响因子：
--
通讯作者：
G. Mole
中科院分区：
文献类型：
--
作者：
G. Mole
一种改进的方法测试纸绝缘水分的测量介电色散的频率范围为0.5？50 c/s或超过时间范围3？300毫秒已被研究。一种直接读取的便携式仪器已经开发出来，用于色散测试，并提供立即显着的结果，其适用于纸绝缘套管，母线，变压器和电缆的测试，目前正在调查中。检测纸绝缘中水分的另一种方法是确定电压和电流之间的非线性关系。虽然在灵敏度方面与弥散法相当，但由于使非线性方法适应现场使用的难度更大，因此尚未开发非线性方法。对安装好的绝缘进行空隙放电试验涉及到解释和可移植性的问题。这些问题的性质将特别针对便携式交流电进行审查放电检测器开发了这种测试。
An improved method of testing paper insulation for moisture by the measurement of dielectric dispersion over the frequency range 0.5?50 c/s or over the time range 3?300 millisec has been investigated. A direct-reading portable instrument giving immediately-significant results has been developed for dispersion testing, and its suitability for the testing of paper-insulated bushings, busbars, transformers and cables is now under investigation. An alternative method of detecting moisture in paper insulation which has been examined is the determination of non-linearity in the relationship between voltage and current. Although comparable with the dispersion method in sensitivity the non-linearity method has not been developed because of the greater difficulty in adapting it to field use. The testing of installed insulation for discharges in voids involves problems of interpretation and of portability. The nature of these problems is examined particularly in relation to a portable a.c. discharge detector developed for this kind of testing.