标准摘要
[中文适用范围]: IEC 61000 的这一部分描述了针对 10 kHz 至 40 GHz 频率之间的电磁干扰的空外壳提供的防护等级的性能要求、测试方法和分类程序。在安装内部电气和/或电子设备和部件之前应测量屏蔽性能。测量这种屏蔽保护的目的是为了证明外壳提供了足够的电磁能量屏蔽,以支持在按照适用的 IEC 标准进行测试时完整组装单元的可接受的性能。然而,应该指出的是,空机柜的令人满意的性能并不一定确保完成的设备能够通过操作设备的所有 EMC 性能测试标准(参见附录 A 中的讨论)。该标准的目的是提供一种可重复的方法来评估空机械外壳(包括机柜和子架)的电磁屏蔽性能,并指定标记代码以允许制造商选择具有已知衰减电磁场能力的外壳。制造商在确定特定设备和应用以及特定用途是否需要应用本标准时,需要考虑抗各种类型电磁干扰的要求,包括闪电和高空电磁脉冲(HEMP)。作为频率函数所必需的外壳屏蔽要求。只要有可能,本标准中采用的分类系统将促进描述外壳提供的电磁应力防护方法的统一性。这包括保护外壳内的设备免受外部电磁应力的影响,以及保护外部设备免受内部产生的电磁应力的影响。负责外壳的技术委员会可以决定在其标准中使用本标准中定义的分类的范围和方式,并定义适用于其设备的“外壳”。然而,测试和性能类别不得与本标准中规定的不同。附录 B 提供了有关外壳产品标准中规定的详细信息的信息指南。 [外文原描述]: Describes performance requirements, test methods and classification procedures for degrees of protection provided by empty enclosures against electromagnetic disturbances for frequencies between 10 kHz and 40 GHz. The shielding protection is measured for the purpose of demonstrating that the enclosure provides adequate shielding of electromagnetic energy to support acceptable performance of the complete assembled units when tested to applicable IEC standards. The purpose of this standard is to provide a repeatable means for evaluating the electromagnetic shielding performance of empty mechanical enclosures, including cabinets and subracks, and to specify a marking code to allow a manufacturer to select an enclosure with a known capability for attenuating electromagnetic fields. The requirements for immunity to various types of electromagnetic disturbances, including lightning and high-altitude electro-magnetic pulse (HEMP) will need to be considered by manufacturers when determining the need for application of this standard for specific equipment and applications, and for the specific enclosure shielding requirements which are necessary as a function of frequency.
英文名称Electromagnetic compatibility (EMC) - Part 5-7: Installation and mitigation guidelines - Degrees of protection provided by enclosures against electromagnetic disturbances (EM code)