초록 ▼

A dielectric fluid composition containing of 60% to 63% in weight of mono-unsaturated fatty acid, of 20% to 23% in weight of di-unsaturated fatty acid, of 5% to 7% in weight of tri-unsaturated fatty acid, and of 6% to 8% in weight of saturated fatty acid, such that the dielectric fluid is free of an

A dielectric fluid composition containing of 60% to 63% in weight of mono-unsaturated fatty acid, of 20% to 23% in weight of di-unsaturated fatty acid, of 5% to 7% in weight of tri-unsaturated fatty acid, and of 6% to 8% in weight of saturated fatty acid, such that the dielectric fluid is free of antioxidants and/or external additives and has the following properties: a dielectric strength of 40 kV to 70 kV at a separation of 2 mm, a dielectric constant of 2.5 to 3.1 at 25° C., and a dissipation factor of 0.05% to 0.15% at 25° C. The dielectric fluid composition can be obtained by a combination of 95.5% to 99.25% in weight of at least one high oleic vegetable oil, of 0.25% to 1.5% in weight of grape seed oil, of 0.25% to 1.5% in weight of sesame seed oil, and of 0.25% to 1.5% in weight of rice bran oil.

대표청구항 ▼

1. A dielectric fluid composition, comprising: from 95.5% to 99.25% by weight of at least one high oleic vegetable oil selected from a group of consisting of low erucic rapeseed oil, high oleic sunflower oil, high oleic safflower oil, and combinations thereof;from 0.25% to 1.5% by weight of grape se

1. A dielectric fluid composition, comprising: from 95.5% to 99.25% by weight of at least one high oleic vegetable oil selected from a group of consisting of low erucic rapeseed oil, high oleic sunflower oil, high oleic safflower oil, and combinations thereof;from 0.25% to 1.5% by weight of grape seed oil;from 0.25% to 1.5% by weight of sesame seed oil; andfrom 0.25% to 1.5% by weight of rice bran oil;wherein said dielectric fluid is free external antioxidants and has:a dielectric strength of 40 kV to 70 kV at a separation of 2 mm;a dielectric constant of 2.5 to 3.1 at 25° C.; anda dissipation factor of 0.05% to 0.15% at 25° C. 2. The dielectric fluid composition of claim 1, wherein the dielectric fluid has a dielectric strength of 40 kV to 55 kV at a separation of 2 mm. 3. The dielectric fluid composition of claim 1, wherein the dielectric fluid has a dissipation factor of 0.06% to 0.1% at 25° C. 4. The dielectric fluid composition of claim 1, wherein the dielectric fluid has: a viscosity less than 50 cSt at 40 ° C.;a pour point temperature of −18 ° C. to −10 ° C.;an acid number less than 0.06 to 0.1 mg KOH/g; andan flash point temperature of at least 300 ° C. 5. The dielectric fluid composition of claim 4, wherein the dielectric fluid has a pour point temperature of −15° C. to −12° C. 6. The dielectric fluid composition of claim 1, wherein the dielectric fluid has: less than 0.05% by weight of free fatty acids;0 ppm of soap; andless than 2 meq/kg of peroxide index. 7. The dielectric fluid composition of claim 1, wherein, in terms of fatty acids, the dielectric fluid comprises: from 60% to 80% by weight of oleic acid;from 2% to 23% by weight of linoleic acid;from 0.5% to 7% by weight of linolenic acid;from 3% to 5% by weight of palmitic acid; andfrom 2% to 3% by weight of stearic acid. 8. The dielectric fluid composition of claim 1, wherein, in terms of fatty acids, the dielectric fluid comprises: from 60% to 80% by weight of mono-unsaturated fatty acid;from 2% to 23% by weight of di-unsaturated fatty acid;from 0.5% to 7% by weight of tri-unsaturated fatty acid; andfrom 5% to 8% by weight of saturated fatty acid. 9. The dielectric fluid composition of claim 7, wherein the dielectric fluid comprises: from 60% to 63% by weight of oleic acid;from 20% to 23% by weight of linoleic acid;from 5% to 7% by weight of linolenic acid;from 4% to 5% by weight of palmitic acid; andfrom 2% to 3% by weight of stearic acid. 10. The dielectric fluid composition of claim 1, wherein the low erucic rapeseed oil is oil of low erucic rape seeds of Brassica napus species. 11. The dielectric fluid composition of claim 1, wherein the high oleic safflower oil is oil of high oleic safflower seeds of Carthamus tinctorius species. 12. The dielectric fluid composition of claim 1, wherein the high oleic sunflower oil is oil of high oleic sunflower seeds of Helianthus annuus species. 13. The dielectric fluid composition of claim 1, wherein the grape seed oil is oil of grape seed of Vitis species. 14. The dielectric fluid composition of claim 1, wherein the sesame seed oil is oil of sesame seeds of Sesamum indicum species. 15. The dielectric fluid composition of claim 1, wherein the rice bran oil is oil of rice bran of Oryza sativa species.