本推荐规程概述了比较两个或多个未密封或密封容器的试验程序 绝缘系统应符合其在额定温度下的预期寿命。该程序仅限于使用额定电压为15 000 V及以下的成型绕制预绝缘定子线圈的交流电机绝缘系统。 本试验程序的目的是评估在通常（正常）使用条件下与空气冷却一起使用的非密封绝缘系统，或在恶劣环境条件下（绝缘暴露于导电污染物）使用的密封绝缘系统。本程序不包括特殊要求，例如封闭在气体环境中的机器或遭受强化学品、金属粉尘或浸没在液体中的机器等。 该程序包括测试候选系统与已知参考系统的说明 具有经验证的服务经验记录并解释这些测试结果的同类型系统。本试验程序的目的是评估在通常（正常）使用条件下与红外冷却一起使用的非密封绝缘系统，或在恶劣环境条件下（绝缘暴露于导电污染物）使用的密封绝缘系统。 本程序不包括特殊要求，例如封闭在气体环境中的机器或遭受强化学品、金属粉尘或浸没在液体中的机器等。 该程序包括测试候选系统的说明，与已知的同类参考系统进行比较，具有经验证的服务经验记录，并解释这些测试的结果。

This recommended practice outlines test procedures for comparing two or more unsealed or sealed insulation systems in accordance with their expected life at rated temperature. The procedure is limited to insulation systems for AC electrical machines using form-wound pre-insulated stator coils rated 15 000 V and below. The intent of this test procedure is to evaluate unsealed insulation systems for use with air cooling under usual (normal) service conditions, or sealed insulation systems for use under severe environmental conditions (where the insulation is exposed to conducting contaminants). This procedure does not cover special requirements, such as those for machines enclosed in gas atmospheres or machines subjected to strong chemicals, metal dust or submersion in liquid, etc. The procedure includes instructions for testing candidate systems in comparison with known reference systems, of the same type, having a proven record of service experience and interpreting the results of these tests. The intent of this test procedure is to evaluate unsealed insulation systems for use with ir cooling under usual (normal) service conditions, or sealed insulation systems for use under severe environmental conditions (where the insulation is exposed to conducting contaminants). This procedure does not cover special requirements, such as those for machines enclosed in gas atmospheres or machines subjected to strong chemicals, metal dust or submersion in liquid, etc. The procedure includes instructions for testing candidate systems in comparison with known reference systems, of the same type, having a proven record of service experience and interpreting the results of these tests.