标准摘要
[中文适用范围]： IEC 60034-18 的这一部分描述了通过同时施加热应力和电应力的耐久性测试来评估绝缘系统的程序。这些程序适用于使用模绕绕组的交流电机中使用或建议使用的绝缘系统。测试程序提供了参考系统和候选系统在电压和温度组合下的性能比较，这些系统过去曾单独用于评估质量，并且被选择在适当的时间范围内和在实际限制内的应力下产生故障。对候选绝缘系统的测试结果将表明它比具有经过验证的使用经验的参考系统是更好还是更差，但无法计算使用寿命。本技术规范中描述的评估不包括应力分级。本技术规范中的测试程序并非旨在确定老化过程中的热应力和电应力之间的相互作用，也不是为了确定耐久线。如果需要有关这种相互作用的附加信息或为了达到耐久性线，则需要进行进一步的测试，其中在恒温和不同电压下进行电老化（IEC 60034-18-32），并在不同的温度和恒定的电压。 [外文原描述]： IEC/TS 60034-18-33:2010 describes procedures for evaluation of insulation systems by endurance testing where thermal and electrical stresses are applied simultaneously. The procedures are intended for insulation systems used in a.c. electrical machines using form-wound windings. The test procedures provide a comparison of performance between reference and candidate systems at combinations of voltage and temperature which have been used separately to assess quality in the past and which are chosen to produce failures within a suitable timescale and at stresses within practical limits. The outcome of the test on the candidate insulation system will indicate whether it is better or worse than the reference system with proven service experience. The main changes of this new edition with respect to the previous one are as follows: - the requirement to investigate the nature of interactions between thermal and electrical stresses has been abandoned; - the use of single stress acceleration factors has been removed; - the selection of stress levels has been adjusted and the temperatures are now related to the thermal class temperature of the insulation system; - the introduction of end-point criteria; - a simplified method to display results.
英文名称Rotating electrical machines - Part 18-33: Functional evaluation of insulation systems - Test procedures for form-wound windings - Multifactor evaluation by endurance under simultaneous thermal and electrical stresses