低压开关设备和控制设备.第7-3部分:辅助设备.熔断器接线板的安全性要求

[中文适用范围]： IEC 60947 的本部分适用于带有螺钉型或无螺钉型夹紧单元的熔断器端子块，用于连接刚性（实心或绞合）或柔性铜导体，以接收符合 IEC 60127-2@ 的熔断体主要用于工业或类似用途，用于不超过 1 000 V ac@ 至 1 000 Hz 或 1 500 V dc@ 的电路，最大短路分断能力为 1 500 A。它们旨在安装在具有以下功能的电气设备中：围绕保险丝端子块的外壳，其程度必须借助工具才能触及。对于某些应用@例如在控制电路中@保险丝端子块可能专门设计用于短路保护。注：本标准可用作熔断器端子块的指南，用于接收不符合 IEC 60127-2 要求的特殊熔断体熔断体。本标准的目的是规定机械@电气和熔断器端子块@的热特性，以确保端子块和标准化熔断体之间的兼容性。本标准可用作需要将特殊装置固定到导体上的熔断器端子块的指南@，例如快速连接端子或缠绕式熔断器端子块。连接@等；-保险丝端子块通过穿透绝缘层的边缘或点提供与导体的直接接触，例如绝缘位移连接@等。在本标准中适用的情况下，术语“夹紧单元”已被用来代替术语“终端”。在引用 IEC 60947-1 时要考虑这一点。 [外文原描述]： IEC 60947-7-3:2009 applies to fuse terminal blocks with screw-type or screwless-type clamping units for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge fuse-links in accordance with IEC 60127-2, intended primarily for industrial or similar use in circuits not exceeding 1 000 V a.c., up to 1 000 Hz or 1 500 V d.c., and having a maximum short-circuit breaking capacity of 1 500 A. They are intended for installation in electrical equipment with enclosures which surround the fuse terminal blocks to such an extent that they are accessible only with the aid of a tool. For certain applications, for example in control circuits, the fuse terminal blocks may be designed exclusively for short-circuit protection. The object of this standard is to specify safety requirements and test methods for the mechanical, electrical and thermal characteristics of fuse terminal blocks, to ensure the compatibility between terminal blocks and standardized fuse-links. This standard may be used as a guide for - fuse terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.; - fuse terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etc. Where applicable in this standard, the term "clamping unit" has been used instead of the term "terminal". This is taken into account in case of reference to IEC 60947-1. The main technical modifications of this standard since this previous publication are listed below: - requirements regarding clearances and creepage distances replaced by reference to Annex H of IEC 60947-1; - requirements for the test of the mechanical strength of the clamping units improved in 8.3.3.1; - requirements for tightening torques for the tests improved and referenced to Table 4 of IEC 60947-1; - requirements for the resistance and the dimensions of dummy fuse-links specified in 8.5.2.5. This publication shall be read in conjunction with IEC 60947-1:2007 and IEC 60947-7-1:2009 .