IEC 60077-4:20 19作为IEC 60077-4:20 19 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 60077-4:20 19给出了交流断路器的规则，其主要触点连接到交流架空接触线；这些电路的标称电压符合IEC 60850。本文件与IEC 60077-2一起具体说明: a)断路器的特性； b)断路器符合的使用条件，参考: -正常服务中的操作和行为； -短路时的操作和行为； -介电性质； c)确认部件在使用条件下符合特性的试验，以及这些试验应采用的方法 d）。断路器上要标记的信息，或与断路器一起给出的信息。 第二版取消并取代了2003年发行的第一版。与上一版相比，此版本包括以下主要技术变更: a)审查瞬态恢复电压的标准值和测试程序； b)温升验证程序变更； c）气密性试验作为型式试验，增加绝缘电阻测量

IEC 60077-4:2019 is available as IEC 60077-4:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60077-4:2019 gives rules for AC circuit-breakers, the main contacts of which are connected to AC overhead contact lines; the nominal voltage of these circuits being in accordance with IEC 60850. This document, together with IEC 60077-2, states specifically:
a) the characteristics of the circuit-breakers;
b) the service conditions with which circuit-breakers comply with reference to:
- operation and behaviour in normal service;
- operation and behaviour in short-circuit;
- dielectric properties;
c) the tests for confirming the compliance of the components with the characteristics under the service conditions and the methods to be adopted for these tests
d). the information to be marked on, or given with the circuit-breaker.
This second edition cancels and replaces the first edition, issued in 2003. This edition includes the following main technical changes with regard to the previous edition:
a) standard values of transient recovery voltages and test procedure are reviewed;
b) procedure of verification of temperature rise is changed;
c) air-tightness test as type test, insulation resistance measurement are added