旋转电机 - 第11部分:热保护

[中文适用范围]： 本部分 IEC 60034 规定了在感应电机定子绕组内或放置在其他合适位置的热保护器和热检测器的使用要求，旨在防止因热过载导致严重损坏。它适用于符合 IEC 60034-1 和 IEC 60034-12 标准的单速三相 50 Hz 或 60 Hz 鼠笼式感应电机，这些电机的额定电压高达 1000 V，并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）；轴承和其他机械部件的保护；特定应用应使用的保护方法。 [外文原描述]： 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.