本文叙述了日本目前工厂所采用的几种绝缘老化诊断试验。从绝缘技术不断进步的角度,对以往试验的有效性、判断绝缘好坏的标准、温度和湿度对测定值的影响等及目前的试验,提出了所存在的问题。同时,介绍了用温度、湿度来修正试验结果的公式和采用绝缘破坏性试验、静电容量以及部分放电试验来判断绝缘老化的方法。 This article describes several insulation aging diagnostic tests currently used in Japan. From the perspective of continuous improvement of insulation technology, the existing problems are put forward on the effectiveness of previous tests, the criteria for judging the insulation quality, the influence of temperature and humidity on the measured values, and the current tests. At the same time, the method of correcting the test result by temperature and humidity, and the methods of using insulation destructive test, electrostatic capacity and partial discharge test to judge the insulation aging are introduced.