Dielectric fluid having defined chemical composition for use in electrical apparatus
First Claim
1. A dielectric coolant suitable for use in power distribution equipment, consisting essentially of:
- approximately 1-99 weight percent alphaolefin oligomers with carbon chain lengths of C6 to C12 and approximately 1-99 weight percent of a compound selected from the group consisting of polyols esterified with linear or branched alkyl groups with chain lengths of C5 to C20, and triglycerides.
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Abstract
The present invention comprises a mixture of hydrocarbons having a well-defined chemical composition that is suitable for use as a dielectric coolant in electrical equipment in general, and specifically in transformers. The dielectric coolants of the present invention are particularly suited for use in sealed, non-vented transformers, and have improved performance characteristics, including decreased degradation of the paper insulating layers, as well as a greater degree of safety and environmental acceptability. The present dielectric coolants comprise relatively pure blends of compounds selected from the group consisting of aromatic hydrocarbons, polyalphaolefins, polyol esters, and natural vegetable oils, along with additives to improve pour point, increase stability and reduce oxidation rate.
95 Citations
23 Claims
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1. A dielectric coolant suitable for use in power distribution equipment, consisting essentially of:
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approximately 1-99 weight percent alphaolefin oligomers with carbon chain lengths of C6 to C12 and approximately 1-99 weight percent of a compound selected from the group consisting of polyols esterified with linear or branched alkyl groups with chain lengths of C5 to C20, and triglycerides.
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2. A dielectric coolant suitable for use in power distribution equipment, comprising:
a mixture of a polyalphaolefin with a polyol ester, said polyalphaolefin being selected from the group consisting of oligomers of C6, C8, C10, and C12 alphaolefins. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A dielectric coolant, comprising:
a blend of a polyalphaolefin with a triglyceride, said polyalphaolefin being selected from the group consisting of oligomers of C6, C8, C10, and C12 alphaolefins. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A dielectric coolant suitable for use in power distribution equipment, consisting essentially of:
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approximately 1-60 weight percent alphaolefin oligomers with carbon chain lengths of C6 to C12 and approximately 40-99 weight percent of a compound selected from the group consisting of polyols esterified with linear or branched alkyl groups with chain lengths of C5 to C20, and triglycerides.
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Specification