Abstract: Analyzing the cause of the porcelain insulator discharging and putting forward effective protective measures.The paper stresses on installation and use of the special-purpose device sweeping live catenary.

• 文摘:分析了电力机车车顶瓷瓶放电原因，并提出了有效防治措施。重点介绍了带电清扫接触网专用设备安装和使用。