IEC TS 62749:2020 RLV包含官方IEC国际标准及其红线版本。Redline版本不是官方文档，它只有英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC TS 62749:2020规定了公共低压、中压和高压（50 Hz或60 Hz）网络供电终端的预期电力特性。 注1不同国家/地区的不同电压等级之间的界限可能不同。在本TS的上下文中，使用以下系统电压术语: -低电压(LV)是指小于或等于1kV； -中压(MV)是指在1kV和35kV之间； -高压(HV)是指35kV至230kV之间。虽然电能质量在许多方面与EMC相关，但本文档不是EMC出版物。这第二版取消并取代了2015年出版的第一版。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: a)用于每周分析的最小剩余数据数， b)改善EN 50160和IEC TS 62749之间的兼容性， c)日常滑动窗口概念的进一步解释， d)对用于事件的聚合方法的进一步解释， e)进一步解释电能质量和EMC之间的关系， f)增加电源通信系统(MCS)的新定义， g)增加新的附件G:其他现象， h)将IEC TR 62510的主要内容转移至IEC TS 62749。

IEC TS 62749:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

IEC TS 62749:2020 specifies the expected characteristics of electricity at the SUPPLY TERMINALS of public low, medium and high voltage, 50 Hz or 60 Hz, networks.
NOTE 1 The boundaries between the various voltage levels can be different for different countries/regions. In the context of this TS, the following terms for system voltage are used:
- low voltage (LV) refers to less than or equal to 1 kV;
- medium voltage (MV) refers to between 1 kV and 35 kV;
- high voltage (HV) refers to between 35 kV and 230 kV.
While power quality is related to EMC in a number of ways this document is not an EMC publication. This second edition cancels and replaces the first edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) minimum number of remaining data for weekly analysis,
b) improvement of the compatibility between EN 50160 and IEC TS 62749,
c) further explanation of the conception of daily sliding window,
d) further explanation of the aggregation method used for events,
e) further explanation of the relation between Power Quality and EMC,
f) addition of a new definition of mains communicating system (MCS),
g) addition of a new Annex G: Other phenomena,
h) transfer of the main content of IEC TR 62510 to IEC TS 62749.