Product Description
Cargill FR3® fluid is a natural ester-based dielectric coolant formulated for use in distribution and power transformers.
FR3 fluid is primarily used in new transformer applications. It has also been applied in transformer retrofill, new switchgear,
specialty power supplies, and other applications.
ENVIRONMENTAL
FR3 fluid is formulated from vegetable oils and performance enhancing additives. It passed the very sensitive acute aquatic toxicity (OECD 202 and 203), and meets the highest EPA biodegradation rate classification. Contamination by mineral oil may result in costly remediation requirements in the event of a spill.
FIRE SAFETY
FR3 fluid is UL Classified and FM Approved. It qualifies as a NEC less-flammable dielectric coolant with a flash point of approximately 330°C and a fire point of 360°C. Mineral oil concentrations in excess of 7% can reduce the fire point
below the 300°C, the threshold required for NEC and IEC fire resistant classifications for certain installations where
increased fire safety is required. Typically, with proper retrofilling techniques, the level of residual mineral oil that
will eventually leach out of the cellulose insulation over time should not exceed 4-5% in power transformers and 5-6%
in distribution transformers.
Compatibility of Insulating liquids
FR3 fluid is miscible with conventional mineral oil, high molecular weight hydrocarbons, PCB (Askarel) and most PCB substitutes (such as PERC). Most relevant exception is silicone oil. FR3 fluid is not miscible with silicone oil and should
not be applied in transformers previously containing silicone oil.
