高压开关设备和控制设备.第105部分:超过1 kV包括52 kV额定电压的交流开关保险丝组合件

[中文适用范围]： “IEC 62271-1:2007 的第 1.1 条不适用，并替换如下： IEC 62271 的这一部分适用于公共和工业配电系统的三极单元，这些单元是开关的功能组件，包括隔离开关和限流器设计为能够在额定恢复电压下分断@达到并包括额定短路开断电流的任何电流；在额定电压下接通额定短路开断电流的电路。不适用于熔断器-断路器@熔断器-接触器@电机电路组合或包含单个电容器组开关的组合。在本标准@中，“组合”一词用于表示其中组件构成一个组合。功能组件。给定类型的开关和给定类型的熔断器的每种关联定义了一种类型的组合。在实践中，@不同类型的熔断器可以与一种类型的开关组合@，这给出了具有不同特性@的几种组合，特别是关于额定电流。此外，为了维护目的，用户应该知道可以组合到给定开关的保险丝类型，而不会损害对标准的遵守以及如此组合的相应特性。然后，开关-熔断器组合由其类型名称定义，并且所选熔断器列表由制造商定义，即所谓的“熔断器参考列表”。给定组合符合此标准意味着使用所选熔断器之一的每个组合都被证明符合此标准。熔断器的加入是为了将组合的短路分断额定值扩展到单独开关的额定值之上。它们配备有撞针，以便在熔断器运行时自动断开开关的所有三个极，并在故障电流值高于熔断器的最小熔化电流但低于熔断器的最小开断电流时实现正确操作。除了熔断器撞针@之外，该组合还可以配备过电流脱扣器或分励脱扣器。注：在本标准中，术语“熔断器”用于表示熔断器或熔断体，其中文本的一般含义不会导致歧义。本标准适用于设计用于 50 Hz 或 60 Hz 三相交流电系统的额定电压高于 1 kV 至 52 kV 的组合。保险丝符合 IEC 60282-1 标准。本标准不包括需要依赖手动操作的设备。开关@包括其特定机制@应符合IEC 62271-103，但考虑熔断器限流效应的短时电流和短路接通要求除外。 IEC 62271-102 涵盖了构成组合整体部分的接地开关。” [外文原描述]： IEC 62271-105:2012 applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches including switch-disconnectors and current-limiting fuses designed so as to be capable of - breaking, at the rated recovery voltage, any current up to and including the rated short-circuit breaking current; - making, at the rated voltage, circuits to which the rated short-circuit breaking current applies. It does not apply to fuse-circuit-breakers, fuse-contactors, combinations for motor-circuits or to combinations incorporating single capacitor bank switches. This second edition cancels and replaces the first edition of IEC 62271-105, published in 2002, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - implementation of figures at the place where they are cited first; - renumbering of tables; - addition of some of the proposals from IEC paper 17A/852/INF; - addition of missing subclauses of IEC 62271-1; - implementation of 6.105 "Extension of validity of type tests" and consequently removing of the relevant parts in the different existing clauses; - change of 7th paragraph of 6.101.4 as there is now a definition of NSDD given in 3.7.4 of IEC 62271-1:2007. Harmonization with IEC 62271-107; - some referenced clauses in other standards like IEC 60282-1 were changed and therefore changed the editions under 1.2 to the ones referred to; - addition of a new Annex C defining tolerances. This publication is to be read in conjunction with IEC 62271-1:2007 .