IEC 60255-27:2023 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 60255-27:2023版3.0和之前的IEC 60255-27:2013 CSV版2.0之间的所有更改。此外，还提供了IEC TC 95专家的意见，以解释最相关变更的原因，或澄清内容的任何部分。 IEC 60255-27:2023规定了测量额定交流电压高达1 000 V或额定直流电压高达1 500 V的继电器和保护设备的产品安全要求。本文件规定了基本的安全要求，以最大限度地降低火灾风险以及触电或伤害用户和财产造成的危险。本文件仅规定了产品安全要求；不包括设备的功能性能。本文件涵盖了设备在机柜、机架和面板中安装和使用的所有方式。本文件也适用于分流器、串联电阻、变压器、辅助控制面板、显示装置等与测量继电器和保护设备配合使用并一起试验的辅助装置。

IEC 60255-27:2023 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 60255-27:2023 edition 3.0 and the previous IEC 60255-27:2013 CSV edition 2.0. Furthermore, comments from IEC TC 95 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content.

IEC 60255-27:2023 specifies the product safety requirements for measuring relays and protection equipment having a rated AC voltage up to 1 000 V, or a rated DC voltage up to 1 500 V. This document specifies essential safety requirements to minimize the risk of fire and hazards caused by electric shock or injury to the user and property. This document specifies only product safety requirements; functional performance of the equipment is not covered. This document covers all the ways in which the equipment can be mounted and used in cabinets, racks and panels. This document also applies to auxiliary devices such as shunts, series resistors, transformers, auxiliary control panels, display devices, etc., that are used in conjunction with measuring relays and protection equipment and are tested together.