The proper earthing of the shielded layer of cable in HV substation plays an important part in reducing electromagnetic interference to the microcomputer-based secondary facilities.

高压变电所内屏蔽电缆屏蔽层的正确接地，对降低外部电磁场对微机型二次设备的干扰水平，起着重要作用。

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Oilpaper capacity type wall bushing is used for insulation and fixed HV or EHV conductor that crosses the wallboard of building in power plant and substation mainly.

油纸电容式穿墙套管主要用于发电厂、变电站中引导高压或超高压导线穿过建筑物的墙板，作为导电载流和高压对地墙板的绝缘及机械固定用。

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