IEC 61251:2015描述了电绝缘材料和系统耐压试验中涉及的许多因素。它描述了耐压图，列出了说明其局限性的测试方法，并为评估正弦交流电提供了指导。绝缘材料和系统的耐压试验结果。本国际标准适用于20 Hz至1 000 Hz的电压频率范围。一般原理也可适用于其它电压形状，包括脉冲电压。定义并解释了电压耐受性中使用的术语。IEC 61251的第一版取消并取代了2008年发布的IEC TS 61251的第二版。本版本构成技术修订版，包括相对于IEC TS 61251第二版的以下重大技术变更:a)从技术规范升级为国际标准； b)澄清自IEC TS 61251发布以来提出的问题。

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.