IEC 62271-107:2019作为IEC 62271-107:2019 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62271-107:2019适用于设计额定电压高于1 kV至52 kV的三极操作熔断器，用于50 Hz或60 Hz的三相交流系统。这第三版取消并取代了2012年出版的第二版。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)在相关情况下应用IEC 62271-1第二版引入的技术变更； b）去除额定TRV，TRV现在被视为测试参数），如IEC 62271-100; c)不再使用术语“热流”；额定连续电流与已安装的熔断器连接，其数值应由制造商连同可接受的熔断器列表一起提供；出于测试目的，参考列出的最高额定连续电流，其中先前的措辞是“额定最大热电流”，以符合IEC 62271-105； d)接通和断开测试任务是独立的型式测试（如果开关设备已被验证为负载断开开关，则可以省略一些测试）。然而，TDIt0和TDIlow保持为序列，因为它们与相同的额定值(It0)相关联； e)在为实现熔断器预期的功能而表达的要求与仅当该功能由支架执行时相关的要求之间引入了区别。单独的设备。目标是当功能在这样的程序集中实现时，避免与处理程序集的标准的需求重复或冲突。

IEC 62271-107:2019 is available as IEC 62271-107:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62271-107:2019 applies to three-pole-operated fused circuit-switchers designed with rated voltages above 1 kV up to and including 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) technical changes introduced by the second edition of IEC 62271-1 are applied, where relevant;
b) rated TRV is removed and TRV is now treated as a test parameter), as in IEC 62271-100;
c) the term "thermal current" is no longer used; the rated continuous current is linked to the installed fuse-links, and values shall be provided by the manufacturer together with the list of the acceptable fuse-links; for tests purpose, the highest rated continuous current listed is referred, where previously the wording was "rated maximum thermal current", for consistency with IEC 62271-105;
d) making and breaking test duties are independent type tests (as some may be omitted if the switching device has been validated as a load-break switch). However, TDIt0 and TDIlow are kept as a sequence as they are linked to the same rated value (It0);
e) differentiation has been introduced between requirements expressed for fulfilling the function expected from a fused circuit-switcher, from requirements only relevant when the function is performed by a stand-alone device. The goal is to avoid duplication or conflicts of requirements with a standard dealing with assemblies, when the function is implemented within such an assembly.