变压器绝缘纸（板）平均含水量测定法频域介电谱法 DLT 1980-2019.pdf

ICS27.140F20D中华人民共和国电力行业标准DL/T1980-2019变压器绝缘纸（板）平均含水量测定法频域介电谱法Test method of average moisture content in transformer insulation paper andpaperboard Frequency domain dielectric spectroscopy method2019-06-04发布2019-10-01实施国家能源局发布