GB/T 2951.51-2008 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

GB/T 2951.51-2008 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 ℃