低压开关设备和控制设备第7-4部分:辅助设备铜导线用PCB接线板

[中文适用范围]： 本标准规定了主要用于工业或类似用途的PCB接线端子（PCB terminal blocks）的要求。接线端子通过焊接、压入或等效方法安装在印刷电路板上，以提供铜导体与印刷电路板之间的电气和机械连接。本文件适用于连接铜导体的PCB接线端子，导体截面范围为0.08 mm²至300 mm²（AWG 28-600 kcmil），可带或不带特殊处理。设计用于额定电压不超过1000 V交流（最高1000 Hz）或1500 V直流的电路中。本文件也可用作带有分断单元、集成熔体等组件或其他尺寸导体的特殊类型PCB接线端子的指南。 [外文原描述]： IEC 60947-7-4:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60947-7-4:2019 specifies requirements for PCB terminal blocks primarily intended for industrial or similar use. Mounting and fixing on the printed circuit board is made by soldering, press-in or equivalent methods to provide electrical and mechanical connection between copper conductors and the printed circuit board. This document applies to PCB terminal blocks intended to connect copper conductors, with or without special preparation, having a cross-section between 0,08 mm2 and 300 mm2 (AWG 28-600 kcmil), intended to be used in circuits of a rated voltage not exceeding 1 000 V AC up to 1 000 Hz or 1 500 V DC. This second edition cancels and replaces the first edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) additional test for PCB terminal blocks with clamping units, where contact pressure is transmitted through insulating materials; b) tightening torques for screws now given in Table 4 of this document (previously given in Table 4 of IEC 60947-1:2007); tightening torques added for an additional type of screw; c) new criteria for verification of contact resistance introduced; d) clarification in the description of the temperature-rise test (current-temperature derating); corrections in the test sequence according to Figure 4.