广西钦州配电变压器的防雷保护

广西钦州市配电变压器雷害严重,需要进行防雷改造。通过对钦州市易遭雷害的配电变压器进行现场调研与接地电阻的测量,结合相关理论指出：配电变压器低压侧未安装避雷器、接地装置问题突出、接地电阻超标是该地配电变压器在防雷保护上存在的缺陷与不足。基于此分析,提出了配电变压器低压侧安装避雷器、低压侧出线经1段电缆后再与架空线相连、改造接地装置、降低接地电阻等改造措施。

Lighting Protection of Distribution Transformer in Qinzhou of Guangxi

The lighting accidents of distribution transformer in qinzhou of Guangxi occur seriously so that it is required to reform the lighting protection.Based on the field investigation and experiments of measuring the earth resistance,it is proposed by relevant theory that the distribution transformers suffering lighting strike is due to the defective lighting protection,including unequipped low voltage arresters,problematic earth device and earth resistance beyond standard value.Based on the analysis,some measures are proposed such as installing low voltage arresters,connecting the coilout at low voltage side with cable and overhead line,reforming earth device and reducing the ground resistance.