| 摘要 |
An electrical insulation oil composition is provided to exhibit high withstand voltage and excellent hydrogen gas absorption while avoiding low-temperature flowability of the conventional mixed aromatic hydrocarbons. The electrical insulation oil composition comprises a component which is obtained by distilling mixed aromatic hydrocarbons from a platforming or aromizing process and has a distillation range of 280-330°C. When the electrical insulation oil composition is analyzed by HPLC, a content of aromatic hydrocarbons is 95-100area%. When the aromatic hydrocarbons are classified into monocyclic, bicyclic, and tricyclic hydrocarbon groups, an area ratio of the monocyclic, bicyclic, and tricyclic hydrocarbon groups in the aromatic hydrocarbons analyzed by HPLC, is 3-20: 60-94: 3-20.
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