Dielectric Fluids Overview - Trade Association

CONFIDENTIAL. This document contains Trade secret information. Disclosure, use or reproduction outside Cargill or inside Cargill, to or by those employees who do not have a need to know is prohibited except as authorized by Cargill in ConferenceNovember 6th, Ester Dielectric Fluids OverviewAgenda Public Power DEED story History fluid comparison Natural Ester fluid Fire Safety Environmental Impact Longer life Industry Validation / Testing Key takeaways2 APPA's American Public Power AssociationDEED program-Conceives Natural Ester Revolution ..and Envirot FR3 3 Natural Ester transformer placed into service in 1997 by Waverly Power & Light- Iowa. Waverly P&L- Piloted field testing. Now nearly 1 million transformers use Natural Esters as part of their insulation system. A transformer containing the Envirotemp FR3 transformer fluid is pictured in the foreground. Photo courtesy of Waverly Light & Power Free Breathing DesignsSealed DesignsThermally Upgraded KraftNatural Esters188019001930196019902010 Common failure mode: mineral oil (sludge, a bi-product of oxidation) impacted heat transfer/dissipationDiagnostics put into practice2020 High temperature materials standardsCommon failure mode: shifted to solid insulation; constrained by operating temperatureCommon failure mode: solid insulation; operating temperature increased85oC AWR, 130oC HST55oC AWR, 95oC

CONFIDENTIAL. This document contains trade secret information. Disclosure, use or reproduction outside Cargill or inside Cargill, to or by those employees who do not have a need to k now is prohibited except as authorized by Cargill in writing.

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