标准摘要
[中文适用范围]： 本文件适用于额定电压不超过 1000 V 交流电的电路，连接用于非电机负载的半导体控制器和半导体接触器。它涵盖了其用途：在交流电路的导通状态和关断状态之间改变状态的操作；带有或不带有旁路切换装置；作为控制器用于降低交流电压的均方根（RMS）幅值。本文件不适用于：机电接触器；与半导体控制器和半导体接触器关联的短路保护器件；半导体电机控制器或软启动器设备；半导体变频器；固态继电器；在爆炸性大气中使用的产品；软件和固件要求；网络安全性方面。用于半导体控制器和接触器中的接触器和控制电路器件被认为符合其相关产品标准的要求。如果使用机械开关器件，则被认为满足其自身 IEC 产品标准和本文件附加要求。本文件的目的在于说明半导体控制器和半导体接触器的特性；半导体控制器和半导体接触器在正常和异常运行条件下（包括过流运行条件）的介电特性； enclosure 提供的防护等级（如适用）；包括防电击、火灾危险和机械危险的安全措施在内的结构；确认满足这些条件的测试及其方法；设备制造商文献中应提供的信息。 [外文原描述]： IEC 60947-4-3:2020 applies to semiconductor controllers and semiconductor contactors for non-motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC. It covers their use: – for operations of changing the state of AC electric circuits between the ON-state and the OFF-state; – with or without bypass switching devices; – as controller, for reducing the amplitude of the RMS AC voltage. This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) scope exclusions; b) editorial correction of notes and hanging paragraphs; c) safety aspects related to: - general aspects; - limited energy circuits; - electronic circuits; d) mention of dedicated wiring accessories; e) power consumption measurement; f) alignment to IEC 60947-1:2020; g) alignment with IEC 60947-4-2 when appropriate.
英文名称Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads