标准摘要
[中文适用范围]： IEC 60947 系列的这一部分规定了控制单元的要求，控制单元响应旋转电机和工业应用中的 PTC 热敏电阻来控制开关装置。它规定了该类型系统的要求，包括 [外文原描述]： IEC 60947-8:2021 specifies requirements for control units, which control a switching device in response to the PTC thermistors incorporated in rotating electrical machines and the industrial application. This second edition cancels and replaces the first edition published in 2003, Amendment 1:2006 and Amendment 2:2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: safety aspects related to: general aspects; limited energy circuits; electronic circuits; alignment to IEC 60947-1:2020; wire break detection function; the term detector is replaced by thermistor; reference to IEC 60738-1-4.
英文名称Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines