送电线路对架空及埋地通信光缆的危险影响

为避免高压送电线路故障时的短路电流对通信架空及埋地光缆金属构件感应较大的电动势及险电压，造成构件绝缘击穿，引起通信设备故障及通信事故发生，通过分析送电线路对架空及埋地通信光缆的危险影响允许值，提出送电线路发生单相地故障时对架空及埋地光缆的危险影响计算及对通信光缆的保护措施。

The danger impact of the transmission line to the overhead and buried communication optical cable

To avoid the large electromotive force and voltage inducted by the short- circuit current generated because of high- voltage transmission line fault to the communication overhead and buried optical cable metal component, which result in the component insula- tion breakdown and the appearance of the communication device fauh and communication accident, the paper analyzes the danger im- pact allowable value of the transmission line to the overhead and buried communication optical cable and then presents the danger im- pact calculation to the overhead and communication buried optical cable when single - phase grounding fault occurs in the transmission line and the protection measures to the communication optical cable.