大化电厂通信大楼防雷装置的改造

Retrofitting of Lightning Protection for Communication Building of Dahua Power Plant

在通信大楼顶部设置 2基 9m高的头部分裂均压针式新型避雷塔 ,配合 2m× 2m屏蔽网 ,取代原有的 2 5m高旧避雷针 ,可有效减少通信大楼的落雷次数 ,减弱雷电磁场强度。将所有进出通信大楼的通信线、电源线改用屏蔽电缆 (电缆的屏蔽层接地 ) ,并在通信机房设置一参数稳压电源 ,供电电源经参数稳压电源向通信设备及厂区电视监控设备供电 ,可有效防止感应雷过电压通过通信线。

new needle type lightning towers of head bundle equalizing with a height of 9 m are erected on the top of the communication building, equipping with 2 m×2 m shielding mesh to replace the original old lightning rode at 25 m high, which can effectively reduce the number of lightning on the building and reduce the lightning magnetic field strength. All communication and power cables in/out of the building have been replaced with shielded cables (the shielding course of the cable is grounded) and a parameter voltage stabilizer installed in the communication machine room. The power source through the stabilizer supplies the power to the communication equipment and TV monitors in the plant area. The measures can effectively prevent the equipment damage from the inductive over voltage passing through the communication and power cables.