预制式二次设备舱电磁屏蔽及接地方案分析

Analysis on electromagnetic shielding and grounding scheme for prefabricated secondary equipment cabin

预制式二次设备舱作为电力二次设备在户外运行的载体,为内部的二次设备提供各类防护。对电磁干扰的屏蔽是舱体防护性能的重要环节。文章对预制式设备舱体电磁屏蔽的薄弱环节,如门缝隙、通风口、空调安装间隙等进行了研究,并提出了解决电磁泄露的方案。同时,对预制式设备舱内外部接地方案进行了探讨,对机柜与等电位接地网的连接方式进行了论述。

The prefabricated secondary equipment cabin as a carrier for outdoor operation of secondary power equipment, providing various types of protection for internal secondary equipment. The shielding of electromagnetic interference is an important part of the protection of the cabin. In this paper, the weak points of the electromagnetic shielding of the prefabricated equipment cabin, such as the door gap, the vents, the gap of the air conditioning installation and so on are studied, and the solution to the electromagnetic leakage is proposed. At the same time, the scheme of grounding inside and outside the prefabricated equipment cabin is discussed, and the connection between the cabinet and the equipotential ground network is discussed.