弧焊设备.第6部分:限制负载设备

[中文适用范围]： IEC 60974 的这一部分规定了适用于有限负荷弧焊和切割电源以及专为非专业人士使用的辅助设备的安全和性能要求。电力设备旨在连接到单相公共低压供电系统。发动机驱动电源的输出功率不能超过 7.5 kVA。注 1：该设备通常由非专业人员在住宅区使用。 IEC 60974的本部分不适用于需要操作的弧焊和切割电源： · 引弧和稳定装置； · 液体冷却系统； · 燃气控制台； · 三相输入电源；且仅供工业和专业用途。 IEC 60974 的本部分不适用于以下用途的弧焊和切割电源及辅助设备： · 机械引导应用； ·埋弧焊工艺； · 等离子气刨工艺； · 等离子焊接工艺；注 2：为工业和专业用途而设计的电源、送丝机、焊炬和焊钳分别由 IEC 60974-1、IEC 60974-5、IEC 60974-7 和 IEC 60974- 涵盖。 11.注 3：IEC 60974 的本部分未规定 IEC 60974-10 中给出的电磁兼容性（EMC）要求。 [外文原描述]： IEC 60974-6:2010 specifies safety and performance requirements applicable to limited duty arc welding and cutting power sources, and auxiliaries designed for use by laymen. Electrically powered equipment is intended to be connected to the single phase public low-voltage supply system. Engine driven power sources can not exceed output power of 7,5 kVA. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision. The main significant technical changes with respect to the previous edition are the following: - extension of the scope; - amendment of the title; - touch current at fault condition (see 6.3.7); - new definition of thermal requirements based two independent devices, one for thermal protection and one for thermal control (see 7.1); - new definition for thermal performances at 20 °C (see 7.2); - thermal safety requirements are based on operating temperature for normal condition and maximum temperature in overload condition (see 7.4); - addition of abnormal operation test for thermal control device (see 10.4); - new requirement for auxiliaries (see Clause 16); - new rating plate definition (see Clause 17); - introduction of new mandatory warning symbols (see 12.1.117.3, Box 17b) and 19.2); - induced changes due to publication of IEC 60974-1:2005. This publication is to be read in conjunction with IEC 60974-1:2005 .