10#变压器油是由石蜡基油原料经酮苯脱蜡-溶剂精制-白土补充精制后，凝固点达到低于-10℃时，就作为-10#变压器油原料；当采用中间基或石蜡基原料经酮苯脱蜡-溶剂精制-白土补充精制后，凝固点达到低于-25℃时，就作为25#变压器油；当采用环烷基油作为变压器油原料时，则无须进行酮苯脱蜡就可由常压蒸馏直接得到凝固点低于-45℃的变压器油原料。因此，45#变压器油只能由环烷基油生产。当采用环烷基油生产25#变压器油时，得到的变压器油凝固点通常在-30℃～-45℃。
10 # transformer oil is by paraffin base oil raw materials through a ketone benzene dewaxing solvent refining - clay added after refining, freezing point to below - 10 ℃ when, as a feedstock for - 10 # transformer oil; When using intermediate base or paraffin base material by ketone benzene dewaxing solvent refining - clay added after refining, freezing point to below 25 ℃, as 25 # transformer oil; When using naphthenic base oil as raw materials for the transformer oil, not for ketone benzene dewaxing is below the freezing point can be obtained directly by the atmospheric distillation - 45 ℃ in the transformer oil raw materials. Therefore, 45 # transformer oil can only by naphthenic base oil production. When using naphthenic base oil production of 25 # transformer oil, usually the transformer oil freezing point in - 30 ℃ ~ 45 ℃.
