| 摘要 |
This invention relates to electrical insulating fluids especially for use in transformers and which have excellent low temperature performance. The electrical insulating fluid comprises esters with 17 to 20 carbon atoms formed by the reaction of a saturated monobasic carboxylic acid and a saturated monohydric alcohol. Suitable esters include n-decyl 2-ethyl hexanoate, 2-ethyl hexyl 3,5,5-trimethyl hexanoate, isodecyl 2-ethyl hexanoate, isodecyl isooctanoate, isodecyl 3,5,5-trimethyl hexanoate and n-octyl/n-decyl 2-ethyl hexanoate. In addition to the ester, the electrical insulating fluid may contain as an additive, a stabiliser against oxidation. Suitable additives include an antioxidant such as a hindered phenol and a metal passivator such as a benzotriazole or a derivative thereof. |
