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论述了监控系统的浮地技术、浮地系统通讯线的防高电平浪涌保护原理及保护电路，还讨论了监控系统对电站强大的工频电磁场的防护原理、方法．
This paper discusses the floating technology of the monitoring system, the anti-high-level surge protection principle and the protection circuit of the floating system communication line, and also discusses the protection principle and method of monitoring system to power station’s strong power frequency electromagnetic field.