通过一系列试验,发现空气湿度,尤其是压缩空气的湿度对机车气功电器的低温性能试验结果影响颇大。本文简介一些试验结果,并介绍一种与低温箱配套的简易改进试验装备,同时也对低温试验的操作进行探讨,最后提出几点建议。 Through a series of tests, it was found that air humidity, especially the humidity of compressed air, had a significant impact on the low temperature performance test results of locomotive Qigong electrical appliances. This paper introduces some experimental results, and introduces a simple and improved test equipment that is matched with the low temperature box. At the same time, it also discusses the operation of the low temperature test, and finally puts forward some suggestions.