某电厂330 MW机组6 kV厂用母线系统改造中采用全浇注母线，这是该类型母线在国内大型机组中首次应用，为保证母线安全可靠运行，结合全浇注母线绝缘结构特点，提出了红外成像分析、段间接触电阻测试、绝缘电阻测量、交流耐压试验等多种检测手段。此外，尝试进行了全浇注母线介质损耗因数和电容量测试，并估算BIM（betobar insulation mix）相对介电系数，进一步深入了解全浇注母线绝缘材料的特性。几年来的全浇注母线运行情况表明，这些停电及带电测试方法简便有效，同时设备的运行维护及检修试验工作更具有针对性，相应工作量明显降低。

The full-pouring busbar is adopted in 6 kV auxiliary power system in 330 MW units,which is applied at the first time in large power units of China.In order to guarantee the safe and reliable operation of the busbar,the methods of infrared thermograph,inter-segment contact resistance testing,insulation resistance testing and AC withstand voltage test are presented combining with the insulating structure of the full-pouring busbar.Furthermore,the dielectric power factor and capacitance are tested,and the BIM(betobar insulation mix)relative dielectric constant is estimated for further knowing the properties of the insulated materials.It is shown from the operation of the full-pouring busbar in recent years,that the on-line detection and off-line test are easy to implement,and the work load of maintenance and detection decrease substantially.