额定电压300/500 V及以下的加热电缆 用于舒适加热和防止结冰

[中文适用范围]： 本文件适用于并规定了用于低温应用（如舒适加热和防止结冰）的电阻加热电缆的要求。这些加热电缆和加热电缆组可以包括工厂组装或现场（工地）组装的单元，并且是按照制造商的说明组装的加热电缆。本文件不适用于电压等于或小于50V的裸导体和受保护导体。典型应用包括但不限于：表面加热安装在表面内或下方；直接和储存加热；屋顶、排水沟、管道等的融雪和防冻。工业和商业应用的电阻跟踪加热系统在IEC 62395系列中规定，爆炸性环境应用在IEC/IEEE 60079-30系列中规定，矿物绝缘加热电缆也是如此。护套温度超过100°C的应用不在本文件范围内。本文件的目的是确保电阻加热电缆在其正常定义的使用条件下安全运行。这是通过以下方式实现的：使用符合本文件中详细测试标准的适当结构的加热电缆；对于具有电气保护组件的加热电缆，包括金属编织层、同心线或护套，或其他合适的导电材料，用于故障情况下的保护；确保加热电缆在安全温度下运行，根据国家法规，考虑到电缆结构及其安装中使用的材料。 [外文原描述]： IEC 60800:2021 is applicable to, and specifies requirements for resistive heating cables for low temperature applications such as comfort heating and the prevention of ice formation. These heating cables and heating cable sets can comprise either factory assembled or field (work-site) assembled units, and are heating cables assembled in accordance with manufacturer’s instructions. Bare conductors and protected conductors to be supplied at voltages equal to, or less than, 50 V are excluded from the scope of this document. Typical applications include, but are not limited to: - surface heating installed in or under surfaces; - direct and storage heating; - snow melting and frost protection of roofs, gutters, pipes, etc. Electrical resistance trace heating systems for industrial and commercial applications are specified in the IEC 62395 series [1] and for explosive atmospheres applications in the IEC/IEEE 60079-30 series [2], as are mineral insulated heating cables. Applications in which the sheath temperature exceeds 100 °C are outside the scope of this document.