标准摘要
[中文适用范围]： 本部分IEC 62271适用于由开关或隔离开关和限流熔断器组成的功能组合装置，旨在能够以额定电压开断任何电流（直至额定短路开断电流），并在额定电压下接通适用于额定短路开断电流的电路。该标准适用于额定电压高于1 kV至52 kV（含）的三相交流系统（频率为50 Hz或60 Hz）中的开关熔断器组合。该标准不适用于熔断器与断路器、接触器或隔离开关的组合，也不适用于电动机回路或用单组电容器开关组合的情况。 [外文原描述]： IEC 62271-105:2021 applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches composed of switches or switch-disconnectors and current-limiting fuses designed so as to be capable of - breaking, at the rated 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. 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: - the document has been updated to be in alignment with the second edition of IEC 62271-1:2017; - rated TRV has been removed (TRV is only a test parameter), as in the latest revision of IEC 62271-100; - differentiation has been introduced between requirements expressed for fulfilling the function expected from a switch-fuse combination, 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.
英文名称High-voltage switchgear and controlgear - Part 105: Alternating current switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV