Dielectric fluid
AssigneeCooper Industries, Inc.
InventorsLisa C. Sletson, Clay L. Fellers, Marco J. Mason, Gary A. Gauger, Alan P. Yerges
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Abstract
A dielectric fluid with improved performance in capacitors contains 65% by weight or more monobenzyltoluene. Capacitors including the dielectric fluid can have improved discharge extinction voltages at 60° C.
Claims20
An electrical capacitor comprising a casing and a dielectric fluid in the casing, the dielectric fluid comprising 65 to 95% by weight of monobenzyltoluene and 5 to 35% by weight of diphenylethane.
An electrical capacitor comprising a casing and a dielectric fluid in the casing, the dielectric fluid consisting essentially of 65 to 95% by weight of monobenzyltoluene, 5 to 35% by weight of diphenylethane, and up to 5% by weight of a scavenger.
A dielectric fluid comprising 65 to 95% by weight of monobenzyltoluene, 5 to 35% by weight of diphenylethane, and up to 5% by weight of a scavenger.
A method of making an electrical capacitor comprising:
- providing a casing;
- and
- adding a dielectric fluid to the casing, the dielectric fluid comprising 60 to 95% by weight of monobenzyltoluene and 5 to 40% by weight of diphenylethane.
An electrical capacitor comprising a casing and a dielectric fluid in the casing, the dielectric fluid comprising greater than 65% by weight monobenzyltoluene and diphenylethane, the capacitor having a rated voltage and failing a 55° C. step stress test at greater than 180% of the rated voltage.
Dependencies are inferred from the claim text.