电缆和光缆绝缘和护套材料通用试验方法 第51部分：填充膏专用试验方法 滴点 油分离 低温脆性 总酸值 腐蚀性 23℃时的介电常数 23℃和100℃时的直流电阻率

Common test methods for insulating and sheathing materials of electric and optical cables - Part 51:Methods specific to filling compounds - Drop point - Separation of oil - Lower temperature brittleness - Total acid number - Absence of corrosive components - Permittivity at 23℃ - DC resistivity at 23℃ and 100℃