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Envirotemp® 360 Fluid

Ideally suited for use in free-breathing transformers and other applications like switchgears, Envirotemp 360 synthetic ester fluid provides excellent fire safety and robust performance, even in extreme conditions.

Data Sheet

Your robust, reliable synthetic ester transformer oil

Unlike FR3™ fluid, our superior natural ester dielectric fluid, Envirotemp 360 fluid is perfectly suited for use in free-breathing transformers. Cargill has decades of proven performance with synthetic esters as transformer oil for distribution transformers (pole and pad types), MV/HV power transformers, voltage regulators and OLTCs, rail applications (traction, trackside, and underground), and switchgears.

In addition to its optimized oxidation stability, Envirotemp 360 fluid has a high fire point, excellent thermal and lubricity properties in diverse operating conditions, superior moisture tolerance, and is readily biodegradable (OECD 301B). These physical, chemical, and electrical properties make Envirotemp 360 fluid your solution for a synthetic ester transformer oil that is an alternative to mineral oil and can provide:

Improved fire safety

Extended asset and insulation life

Dielectric strength in extreme temperatures

Better environmental benefits

Envirotemp 360 fluid has been thoroughly evaluated and conforms to IEC 61099 “Specifications for Unused Synthetic Organic Esters for Electrical Purposes.”


Envirotemp® 360 values and specification units

  Standard test methods Permissible values Envirotemp 360 Fluid
Property ASTM / ISO / IEC IEC 61099 TYPICAL

ISO 2211
ISO 2049

≤ 200 Hazen

≤ 100 Hazen

Appearance Visually clear, free from water, suspended matter and sediment
Density at 20ºC (kg/dm3) ISO 3675
ISO 12185
≤ 1000 960
Kinematic Viscosity (mm2/s) ISO 3104    
100ºC - 6
40ºC ≤ 35 34
-20ºC ≤ 3000 1700
Flash Point (ºC) ISO 2719 ≥ 250 > 283
Fire Point (ºC) ISO 2592 ≥ 300 > 315
Pour Point (ºC) ISO 3016 < - 45 < -48
Water content (mg/kg) IEC 60814 ≤ 200b ≤ 50
Acidity (mg KOH/g) IEC 62021 -1
IEC 62021 -2
≤ 0.03 0.01 - 0.02
Oxidation Stability
164 h @ 120ºC IEC 61125
Method C
Total acidity (mg KOH/g) ≤ 0.3 0.13
Total sludge (% mass) ≤ 0.01 < 0.01
Breakdown Voltage (kV) IEC 60156
ASTM D1816
≥ 45b 68
Dielectric Dissipation Factor (tan ∂) IEC 60247
IEC 61620
90ºC and 50 Hz ≤ 0.03b 0.01
DC Resistivity at 90ºC (GΩm) IEC 60247 ≥ 2 60

Note: Specifications should be written referencing only the defined ASTM or IEC acceptance values and test methods. The listed “typical” values are averaged values summarized from a significant number of data points over many years; they are not to be identified as acceptance values.
ASTM D6871 Standard Specification for Natural (Vegetable Oil) Ester Fluids Used in Electrical Apparatus.
IEC 62770: Fluids for electrochemical applications — Unused natural ester liquids for transformers and similar electrical equipment.

ª IEC 61099 requires testing synthetic ester liquids according to IEC 61125 method C for 164h. Envirotemp 360 was tested for 800h.
b for untreated liquid, as received 


Envirotemp 360 fluid details

3-fluids fire point comparison High flash and fire points

With a flash point of >283°C and a fire point of >315°C, Envirotemp 360 fluid is classified as a Class-K, “less flammable” liquid.

Although its fire point is not as high as that of our natural ester dielectric fluid, FR3 fluid, Envirotemp 360 fluid is still far superior to mineral oil when it comes to fire safety. It is therefore a safer choice than mineral oil for areas where the population density is high, or for enclosed spaces where fire could damage equipment or people.

There have been no pool fires reported in transformers filled with Envirotemp 360 fluid.

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Envirotemp® 360 Fluid Sell Sheet

Get an overview of Envirotemp® 360 synthetic ester dielectric fluid.


Envirotemp® 360 Fluid Data Sheet

Get technical details about Envirotemp® 360 synthetic ester dielectric fluid.


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