土方机械.使用电力驱动器和相关部件和系统的机械的电气安全.第3部分：自供电机械的特殊要求

[中文适用范围]： 本文件规定了自供电（利用车载电源）电动推土机（EMM）中的电气设备及其组件的特定安全要求。 它适用于在任何频率下使用 50 V–36 kV AC rms 范围内的板载电压和 75 V–36 kV DC（包括脉动直流的任何重复率）的机器，这些机器适合户外使用。 设备内发生的电压不被视为板载电压，因此不在其范围内。 它旨在与 ISO 14990-1 结合使用，该标准给出了 EMM 的一般要求，无论其供电方式如何。 ISO 14990-2 中给出了外部供电机器的特定要求。 EMM 可以是自供电的，也可以是外部供电的（例如，具有内置充电器且具有供电功能的电池供电机器），在这种情况下，注：对于打算在道路上运行的机器，采用汽车标准ISO 6469 和/或 UN ECE R100 可以提供有用的指导。 有关要求的比较，请参阅附录 B。 [外文原描述]： ISO 14990-3:2016 specifies the particular safety requirements for the electrical equipment and its components incorporated in self-powered (utilizing on-board electric power sources) electrically-driven earth-moving machines (EMMs). It is applicable to those machines using on-board voltages in the range of 50 V?36 kV AC r.m.s. at any frequency, and 75 V?36 kV DC ? including any repetition rate of pulsating DC? intended for outdoor use. Voltages occurring within devices are not considered to be on-board voltages and are thus not within its scope. It is intended to be used in conjunction with ISO 14990‑1, which gives general requirements for EMMs regardless of how they are powered. Requirements specific to externally-powered machines are given in ISO 14990‑2. It is possible to have an EMM that is both self-powered and externally powered (e.g. a battery powered machine having a built-in charger with power supply function), in which case ISO 14990‑2 is also applicable.