旋转电机第11部分:热防护

[中文适用范围]： 本部分 IEC 60034 规定了关于在感应电机定子绕组或其他适当位置安装热保护器和热探测器以保护其免受热过载严重损坏的要求。 它适用于根据 IEC 60034-12 制造的电机，其电压限制在 IEC 60034-12 中规定。轴承和其他机械部件的保护不包括在内。它适用于符合 IEC 60034-1 和 IEC 60034-12 的单速三相 50 Hz 或 60 Hz 笼型感应电动机： • 额定电压不超过 1000 V； • 设计用于直接启动或星三角启动。 不包括： • 转子绕组的直接保护；保护方法仅间接保护转子绕组；对于大型电机（特别是 2 极电机）和启动大惯性负载的电机，在启动时和“跳闸”后尤其要注意转子加热； • 轴承和其他机械部件的保护； • 特定应用中使用的保护方法。 注 1：虽然本文件中给出的温度值高于 IEC 60034-1 中规定的值，但它们并不冲突。 注 2：特定电机类型可能需要额外要求，例如用于家用电器的电机或用于爆炸性环境的电机。 [外文原描述]： IEC 60034-11:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60034-11:2020 specifies requirements relating to the use of thermal protectors and thermal detectors incorporated into the stator windings or placed in other suitable positions in induction machines in order to protect them against serious damage due to thermal overloads. It applies to single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034-1 and IEC 60034-12 that: - have a rated voltage up to 1 000 V; - are intended for direct-on-line or star-delta starting. The main changes with respect to the previous edition are: - the additional specification of winding temperature limits for temperature class 200 (N), - the increased limits of maximum winding temperatures for overloads with rapid variation, - the clarification that the motor winding may be permanently damaged after it has been exposed to temperatures - a clarification of the definition of indirect thermal protection, - a clarification on the test methods for larger motors.