热老化试验是核电厂安全级电气设备鉴定中的主要项目之一，用于确保核电站在设计年限内安全运行。电机是核电站大量应用的设备，由于绝缘系统复杂，其热老化试验的设计和实施极具代表性。以6.6 kV电机40年寿命验证项目为例，介绍了核电厂安全级电机质量鉴定程序中的热老化试验方法，阐述了三点法确定活化能的试验及数据处理过程，与热重分析法进行对比，分析了整机热老化试验条件的确定方法及结果判断条件。%Thermal aging test is one of the key items for safety class electrical equipment quality identification in nuclear power plant, aiming to ensure safety running of nuclear power plant during its design life. Motors are widely used in nuclear power plant. Since insulation system is complicated, the design and implementation of thermal aging test for motors are representative. Taking 6.6 kV motor as an example, the method of three temperature thermal aging test for safety class motor in nuclear power plant was introduced. The test procedure and data processing to decide activation energy using three point method were discussed. And compared with thermogravimetric analysis, the decision of test temperature and aging time, the test criteria of end-product thermal aging were also analyzed.
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