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AssigneeCooper Industries, Inc.
InventorsCharles Patrick McShane, Jerry L. Corkran, Richard A. Harthun, Gary A. Gauger, Kevin J. Rapp, Edgar Howells
Estimating the term…
A transformer is disclosed, including a tank housing a transformer core/coil assembly, a dielectric insulating fluid surrounding the core/coil assembly, the fluid comprising a vegetable oil, an antioxidant dissolved in the oil, and a low temperature additive blended into the oil, wherein the fluid defines a headspace above the fluid. The preferred embodiment includes an oxygen absorbing material contained in the tank and in contact with gases in the tank but isolated from contact with the dielectric fluid, the tank including an opening and a sealed plug in the opening, such that the oxygen absorbing material can be replaced through the opening upon removal of the sealed plug, and further includes a gas permeable polymer container sealed against the opening for supporting the oxygen absorbing material and an indicator in gas contact with the headspace and visible from outside the tank for indicating the presence of oxygen in the headspace.
A transformer including a tank housing a transformer core/coil assembly, comprising:
A transformer including a tank housing a transformer core/coil assembly, comprising:
A transformer including a tank housing a transformer core/coil assembly, comprising:
A method of using a transformer comprising the step of employing in the transformer a dielectric fluid that is essentially a natural food product, the dielectric fluid consisting essentially of a vegetable oil having at least one degree of unsaturation and a fire point above 300° C., wherein the vegetable oil has a viscosity of between 2 and 15 cSt at 100° C., and less than 110 cSt at 40° C.
A transformer including a tank housing a transformer core/coil assembly, comprising:
A method of using a transformer comprising the step of employing in the transformer a dielectric fluid, wherein the dielectric fluid is essentially a natural food product and consists essentially of a vegetable oil having at least one degree of unsaturation and fire point above 300° C., wherein the vegetable oil has a viscosity of between 2 and 15 cSt at 100° C., and less than 110 cSt at 40° C.
Dependencies are inferred from the claim text.