Volumn resistivity of semi-conductive shield is one of the important indicators to reflect electrical properties of cables.Currently,volume resistivity detection of semi-conductive shield in large-scale cables exists some problems,such as uneven surface,low sample preparation efficiency and unstable resistance test data.In the paper,large-scale cutting machine was adopted to solve sample preparation problem of large-size cables.A fixed mold and a copper sheet mold were made to improve the process.The fixed mold method was used to replace the self-adhesive copper tape method for volume resistivity detection of semi-conductive insulation shield,and the copper sheet mold method was used to replace the conductive paste coating method for volume resistivity detection of semi-conductive conductor shield.Taking 64/110 kV cable as an example,volume resistivity of semi-conductive shield was carried out for cables with different nominal cross-sectional areas.Results showed that the new process and detection method could meet test requirements,improve volume resistivity detection efficiency of semi-conductive shield for large-scale cables,and enhance the stability of detection data.
关键词
大规格电缆/半导电屏蔽体积电阻率/检测/工艺
Key words
large-scale cables/volume resistivity of semi-conductive shield/detection/process
维普
万方数据