IEC 61936-1:20 21 CMV包含官方标准及其注释版本。注释版本为您提供了一种快速简单的方法来比较IEC 61936-1:20 21 CMV 3.0版和之前的IEC 61936-1:20 0+AMD1:2014 CSV 2.1版之间的所有更改。此外，还提供了IEC TC 99专家的意见，以解释最相关变更的原因。 IEC 61936-1:20 21规定了标称电压超过1 kV AC、标称频率高达（含）60 Hz的系统中电力装置的设计和安装要求，以便为预期用途提供安全性和正常功能。 本文件不适用于下列任何一项的设计和安装: -独立电力装置之间的架空和地下线路；-电气化铁路轨道和车辆； -采矿设备和装置； -荧光灯装置； -根据IEC 60092的船舶上的装置（所有部件）和根据IEC 61892的海上装置（所有部件），用于海上石油工业中用于钻井、加工和储存目的； -静电设备（如静电除尘器、喷漆装置）； -测试地点； -医疗设备，例如医疗X射线设备。 本文件不适用于预制的、型式试验的开关设备和高压/低压预制变电站的设计，对此有单独的IEC标准。 与上一版相比，此版本包括以下重大技术变更: 导言已重写，以反映本文件制作时的状态；范围进行了完善，明确了本文件的适用； 已更新缺失和过时的术语和定义，包括改进现有术语； 表1已更新，其中需要供应商和用户之间的协议； 明确了电磁兼容性要求； 绝缘协调条款（第5条）改进了措辞，使其更加清晰，技术内容与最新版本的绝缘协调标准进行了更新协调； 关于电气设备的措辞得到了改进，变得更加清晰； 保险丝子条款已得到改进和重新措辞； 增加了当需要断开多个源时的标签要求； 重新引入了地理信息系统缺失的要求；关于通风(HVAC)的子条款已得到改进； 条款7中的附图已更新并移至相应的子条款； 改进了变压器安装的要求，包括调整编辑打字错误； 对保护、自动化和辅助系统条款进行了重组和完善； 防雷击保护范围扩大； 由于安装（并为电力装置的预期用途提供电气安全）与后续活动（如维护和修理）之间的区别而澄清内容，包括安全工作程序； 如果没有关于安全工作程序的省、国家或地区法规，附件F中提供了信息性指南。这取代了第7条中图3的前部分。

IEC 61936-1:2021 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 61936-1:2021 CMV edition 3.0 and the previous IEC 61936-1:2010+AMD1:2014 CSV edition 2.1. Futhermore, comments from IEC TC 99 experts are provided to explain the reasons of the most relevant changes.

IEC 61936-1:2021 provides requirements for the design and the erection of electrical power installations in systems with nominal voltages exceeding 1 kV AC and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended.
This document does not apply to the design and erection of any of the following:
– overhead and underground lines between separate electrical power installations;
– electrified railway tracks and rolling stock;
– mining equipment and installations;
– fluorescent lamp installations;
– installations on ships according to IEC 60092 (all parts) and offshore units according to IEC 61892 (all parts), which are used in the offshore petroleum industry for drilling, processing and storage purposes;
– electrostatic equipment (e.g. electrostatic precipitators, spray-painting units);
– test sites;
– medical equipment, e.g. medical X-ray equipment.
This document does not apply to the design of prefabricated, type-tested switchgear and high voltage/low voltage prefabricated substation, for which separate IEC standards exist.

This edition includes the following significant technical changes with respect to the previous edition:

1. introduction has been rewritten to reflect the status when this document is produced;
2. the scope has been improved to clarify the application of this document;
3. missing and obsolete terms and definitions have been updated including improvement of existing terms;
4. Table 1 has been updated where agreements between supplier and user are needed;
5. requirements of electromagnetic compatibility have been clarified;
6. insulation coordination clause (Clause 5) has improved wording for better clarity and the technical content has an updated coordination to the latest versions of the insulation coordination standards;
7. wording regarding electrical equipment has been improved and made clearer;
8. subclause for fuses has been improved and reworded;
9. requirements have been added for labelling when multiple sources are required to be disconnected;
10. missing requirements for GIS have been reintroduced;
11. subclause regarding ventilation (HVAC) has been improved;
12. figures in Clause 7 have been updated and moved to the corresponding subclause;
13. requirements for transformer installations have been improved including adjustment of editorial typing-errors;
14. clause on protection, automation and auxiliary systems has been restructured and improved;
15. protection against lightning strokes has been extended;
16. clarification of content due to the distinction between erection (and providing electrical safety for the intended use of the electrical power installation) and subsequent activities such as maintenance and repair with safe working procedures;
17. where no provincial, national or regional regulations are available for safe working procedures, an informative guideline is provided in Annex F. This replaces the former parts of Figure 3 in Clause 7.