电弧焊接设备 - 第7部分:手电筒

[中文适用范围]： 本部分IEC 60974规定了用于电弧焊及类似工艺的焊接枪（TORCHES）的安全和结构要求。本文件适用于手工、机械引导、气冷、液冷、机动、送丝盘式和烟尘抽取式焊接枪。在本文件中，焊接枪由枪体、电缆 - 软管组件和其他组件组成。本文件也适用于连接在电源和辅助设备之间的电缆 - 软管组件。本文件不适用于手工金属弧焊或空气弧切割/铲削的焊钳。 [外文原描述]： IEC 60974-7:2019 specifies safety and construction requirements for torches used for arc welding and allied processes. This document is applicable to manual, mechanically guided, air-cooled, liquid-cooled, motorized, spool-on and fume extraction torches. This fourth edition cancels and replaces the third edition published in 2013 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) definitions 3.11 and 3.20 were revised; b) requirements for arc striking and stabilizing voltage rating have been added to the sequence of type tests (see 6.2); c) the AC test voltage requirement for torches that utilize arc striking and stabilizing voltageshas been revised (see 7.5.2); d) the test configuration of isolated circuits for torches that utilize arc striking and stabilizing voltages has been revised (see 7.5.2); e) the metal tube used for the heating tests has additional allowable means of cooling methods (see 8.3.2 and 8.3.5); f) for fume extraction torches, the instructions for use include additional information (see Clause 13, item i)). This document is to be used in conjunction with IEC 60974-1:2017.