Saturated-dimer-acid-diester dielectric fluid

A dielectric fluid, consisting of:

• a saturated dimer acid diester;
• and
• one or more additives selected from the group consisting of antioxidants, metal deactivators, pour point depressants, and combinations of two or more thereof;
• wherein the antioxidants are selected from the group consisting of phenolic antioxidants, amine antioxidants, anthraquinone, tris(2,4-ditert-butylphenyl) phosphite, and citric acid;
• wherein the metal deactivators are selected from the group consisting of benzotriazole derivatives, N,N-bis(2-Ethylhexyl)-1H-1,2,4-triazole-1 methanamine, 2′,3-bis[[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl]]proponiohydrazine, benzo-triazole fatty amine salt, 1-(di-isooctylaminomethyl)-1,2,4-triazole, 1-(2-methoxyprop-2-yl)tolyltriazole, 1-(1-cyclohexyloxypropyl)tolyltriazole, 1-(1-cyclohexyloxyheptyl)tolyltriazole, 1-(1-cyclohexyloxybutyl)tolyltriazole, 1-[bis(2-ethylhexyl)aminomethyl-4-methylbenzotriazole, triethyl borate, tripropyl borate, triisopropyl borate, tributyl borate, tripentyl borate, trihexyl borate, tricyclohexyl borate, trioctyl borate, triisooctyl borate, and N, N-bis(2-Ethylhexyl)-ar-methyl-1H-benzotriazole-1-methanamine;
• and
• wherein the pour point depressants are selected from the group consisting of methacrylic acid ester, polyalkyl methacrylate, fatty acid alkyl esters from fatty acids, polyvinyl acetate oligomers, and acrylic oligomers.