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首页> 外文会议>IEEE electrical insulation conference >How critical are IEC 60034-27-3 maximum values for dielectric dissipation factor and tip-up to determine the reliability of motor stator insulation?
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How critical are IEC 60034-27-3 maximum values for dielectric dissipation factor and tip-up to determine the reliability of motor stator insulation?

机译：IEC 60034-27-3介电耗散因子的最大值和提示的最大值如何确定电动机定子绝缘的可靠性？

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The authors believe that the dissipation factor and tip-up values specified in the Technical Specification IEC 60034-27-3 are not realistic and only applicable to certain types of stator winding insulation systems. To determine how critical these dissipation factor and tip-up values are, test results of sample stator coils and bars having been exposed to long-term aging tests in accordance with IEEE Std. 1553 were studied. The samples were from various types of insulation systems having service proven life. Using Weibull statistics, characteristic life was determined at different stress levels. After determining the life for various insulation systems, an attempt was made to establish a correlation with the respective dissipation factor & tip-up values. The results clearly revealed that an insulation system with higher dissipation factor & tip-up values than the specified requirements of IEC 60034-27-3 can still be considered a reliable system in service. The absolute level of dissipation factor and tip-up are functions of the system being tested, and variation among systems can be completely uncorrelated with the long-term performance. It is therefore recommended that the best approach is to establish a database for benchmarking and to determine a normal production range. It is reasonable for an end-user to request that a new machine's stator coils or winding fall within the respective historical dissipation factor & tip-up distribution for that particular insulation system.
机译：作者认为，技术规范IEC 60034-27-3中规定的耗散因子和倾斜值并不逼真，仅适用于某些类型的定子绕组绝缘系统。为了确定这些耗散因子和提示值的关键程度，样品定子线圈的测试结果和条件根据IEEE STD暴露于长期老化测试。研究了1553年。样品来自各种类型的绝缘系统，具有验证的寿命。使用威布尔统计数据，在不同的压力水平确定特征寿命。在确定各种绝缘系统的寿命之后，尝试与各个耗散因子和倾斜值建立相关性。结果清楚地表明，具有比IEC 60034-27-3的指定要求更高的耗散因子和倾斜值的绝缘系统仍可被视为可靠的服务系统。耗散因子和倾斜的绝对水平是正在测试的系统的功能，并且系统之间的变化可以与长期性能完全不相关。因此建议最好的方法是建立一个数据库，用于基准测试，并确定正常的生产范围。最终用户是合理的，要求新机器的定子线圈或绕组落在该特定绝缘系统的各个验光因子和倾斜分布范围内。

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