氯化铵溶液电导率的准确性对电痕化试验结果的影响
许家峰
(福建省产品质量检验研究院，福建 福州 350002)
摘 要：电痕化试验是测试固体材料耐电痕化指数和相比电痕化指数的重要试验。根据固体绝缘材料耐电痕化指数和相比电痕化指数的测定方法国家标准要求，分析和验证了氯化铵溶液电导率对试验结果的影响，针对目前部分实验室在测试电导率过程中使用线性温度补偿方法的问题，分析了该方法的错误原因，并提出了氯化铵溶液配置和测试电导率的正确方法，为耐电痕化指数和相比电痕化指数试验提供重要参考。
关键词： 耐电痕化指数；相比电痕化指数；氯化铵溶液；电导率；线性温度补偿
中图分类号：TM938.83 文献标识码：A 文章编号：1007-3175(2022)09-0051-03
Influence of the Accuracy of Electrica Conductivity of NH4Cl
Solution on the Tracking Test Result
XU Jia-feng
（Fujian Inspection and Research Institute for Product Quality, Fuzhou 350002, China）
Abstract: The tracking test is a vital experiment for proof tracking index of solid materials and comparative tracking index. This paper analyzed and verified the influence of the electrical conductivity of NH4Cl solution on the test result based on the national standards of proof tracking index of solid materials and comparative tracking index. Many laboratories used the linear thermal compensation method in the electrica conductivity test process. This paper analyzed the problem of that method and proposed the correct method of the NH4Cl solution configuration and electrica conductivity test. This research provides a reference to the proof tracking index and comparative tracking index.
Key words: proof tracking index; comparative tracking index; NH4Cl solution; electrical conductivity; linear thermal compensation
参考文献
[1] 中国电器工业协会. 固体绝缘材料耐电痕化指数和相比电痕化指数的测定方法：GB/T 4207—2012[S].北京：中国标准出版社，2013 ：2.
[2] International Electrotechnical Commission.Method for the determination of the proof and the comparative tracking indices of solid insulating materials ：IEC 60112 ：2020[S].Gevena：Internatio nal Electrotechnical Commission Publication，2020：9.
