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南宁南驼峰溜放车辆测速采用T.CL型雷达,其雷电防护电路中(直流12 V)使用ZFTW-Ⅲ/AL防雷组合,雷达自检(直流24 V)使用ZFTW-Ⅳ/AL防雷组合。由于该雷达雷电防护电路设计不够完善,存在受电力机车回流干扰和雷电地电位反击的影响造成雷达故障的隐患。1现象分析室外ZFTW-Ⅲ/AL防雷组合采用3R-90TB放电管、MYL33V/1 kA压敏电阻、1N5352瞬变电压抑制器三级防雷。该3种防雷元件均与大地相连,
Nanning Southern Hump skating vehicles using T.CL-type radar, the lightning protection circuit (DC 12 V) using ZFTW-Ⅲ / AL lightning combination, the radar self-test (DC 24 V) using ZFTW-Ⅳ / AL lightning combination. Due to the radar lightning protection circuit design is not perfect, there is the risk of radar failure caused by the impact of electric locomotive backflow interference and lightning ground potential back. 1 Phenomenon Analysis Outdoor ZFTW-Ⅲ / AL lightning protection combination of 3R-90TB discharge tube, MYL33V / 1 kA varistor, 1N5352 transient voltage suppressor three lightning. The three kinds of lightning protection devices are connected with the earth,