电气绝缘材料和系统 - 交流耐压评估

[中文适用范围]： 该国际标准描述了电气绝缘材料和系统耐压测试中涉及的许多因素。它描述了耐压图表@列出了说明其局限性的测试方法，并为根据测试结果评估绝缘材料和系统的正弦交流耐压能力提供了指导。本国际标准适用于20 Hz至1 000 Hz的电压频率范围。一般原理也适用于其他电压形状，包括脉冲电压。定义并解释了耐压中使用的术语。 [外文原描述]： IEC 61251:2015 describes many of the factors involved in voltage endurance tests on electrical insulating materials and systems. It describes the voltage endurance graph, lists test methods illustrating their limitations and gives guidance for evaluating the sinusoidal a.c. voltage endurance of insulating materials and systems from the results of the tests. This International Standard is applicable over the voltage frequency range 20 Hz to 1 000 Hz. The general principles can also be applicable to other voltage shapes, including impulse voltages. The terminology to be used in voltage endurance is defined and explained. This first edition of IEC 61251 cancels and replaces the second edition of IEC TS 61251, published in 2008. This edition constitutes a technical revision and includes the following significant technical changes with respect to the second edition of IEC TS 61251: a) upgrade from Technical Specification to an International Standard; b) clarification of issues raised since publication of IEC TS 61251.