IEC 60309-4:20 21适用于主要用于室内或室外工业用途的独立产品，这些产品将以下项目组合在一个外壳内: -根据IEC 60309-1或IEC 60309-2的固定或便携式插座-插座，额定工作电压不超过1000V DC或1000V AC，频率不超过500Hz，额定电流不超过800A； -开关装置。 第二版取消并取代了2006年出版的第一版和修正案1:20 12。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: -更新以考虑IEC 60309-1和IEC 60309-2的技术修订。 本文件应与IEC 60309-1:20 21和IEC 60309一起阅读？2:2021.

IEC 60309-4:2021 applies to self-contained products primarily intended for industrial use, either indoors or outdoors that combine the following items within a single enclosure:
– a fixed or portable socket-outlet according to IEC 60309-1 or IEC 60309-2 with a rated operating voltage not exceeding 1 000 V DC or 1 000 V AC with a frequency not exceeding 500 Hz and a rated current not exceeding 800 A;
– a switching device.
This second edition cancels and replaces the first edition published in 2006 and Amendment 1:2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
– updated in order to take into account the technical revisions to IEC 60309-1 and to IEC 60309-2.
This document is to be read in conjunction with IEC 60309-1:2021 and with IEC 60309？2:2021.