telecontrol relay

In fact, power line used in lower speed data communications such as relay protection using power line 、 telecontrol information 、 SCADA 、 voice communications and power scheme has a history of several years.

事实上，在最近的几十年，电力线已经被用于低速数据通信，如电力传输线继电保护、远动信息、SCADA、语音通信和组织电力调度指挥等等。

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