IEC 60549:2013适用于根据IEC 60871-1《交流用并联电容器》与高压电容器一起使用的外部保险丝。额定电压高于1 000 V的电力系统。第1部分:总则。IEC 60871-1适用于电容器单元和电容器组，特别是用于交流的功率因数校正。电力系统，以及用于电力滤波器电路的电容器。根据IEC 60549:2013的熔断器旨在清除电容器单元内部的故障，以允许该单元所连接的组的其余部分继续运行（单元熔断器），或者清除整个电容器组上的故障，以将组与系统隔离（线路熔断器）。这第二版取消并取代了1976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: -文件与当前IEC文件结构要求的一致性； -澄清某些测试要求。 关键词:与高压电容器配套使用的外部熔断器，交流电力系统用并联电容器

IEC 60549:2013 applies to external fuses used with high-voltage capacitors according to IEC 60871-1, Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V - Part 1: General. IEC 60871-1 is applicable to both capacitor units and capacitor banks intended to be used, particularly, for power-factor correction of a.c. power systems, and also to capacitors intended for use in power filter circuits. Fuses according to IEC 60549:2013 are intended to clear either faults inside a capacitor unit to permit continued operation of the remaining parts of the bank in which the unit is connected (unit fuses) or faults on the whole capacitor bank to isolate the bank from the system (line fuses). This second edition cancels and replaces the first edition published in 1976. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- alignment of the document with current IEC document structure requirements;
- clarification of certain test requirements. Keywords: external fuses used with high-voltage capacitors, shunt capacitors for a.c.power system