Dielectric Fluids
Electrical Apparatus

R2000

Envirotemp™ FR3™ Fluid
DESCRIPTION
Envirotemp™ FR3™ fluid is a renewable,
bio-based natural ester dielectric coolant
for use in distribution and power classtransformers where its unique fire
safety, environmental, electrical, andchemical properties are advantageous.
Acceptance limits for new fluid areshown in Table 1. More than 20 yearsof field experience (with over one
million transformers in service) confirms
excellent performance.
Envirotemp FR3 fluid is formulated fromseed oils and performance enhancing
additives. It does not contain petroleum,
halogens, silicones or corrosive sulfur. It

quickly and thoroughly biodegrades1 inthe environment. The fluid is non-toxic
in acute aquatic2 and oral toxicity tests3.
The Color Green tint reflects its favorable
environmental profile (See Table 2) andreadily distinguishes it from petroleum
based oils.

Dielectric Liquid for use in complying with
the National Electric Code6 (NEC) andinsurance listing requirements7.

Envirotemp FR3 fluid has exceptionallyhigh flash/fire points of approximately
330/360 °C - the highest ignition
resistance of any high fire point dielectric
fluid currently available. It qualifies as a“high-fire-point”, “less-flammable”, “IECClass K”, and “non-propagating” fluid.
Envirotemp FR3 fluid is Approved4 by FM
Global and Classified5 by Underwriters
Laboratories as a Less-Flammable

Envirotemp FR3 fluid is compatible
with standard transformer construction
materials and components. Envirotemp
FR3 fluid should be stored, handled,and processed in a similar meticulous
manner as transformer mineral oil. See
Cargill’s Envirotemp FR3 Fluid Storageand Handling Guide, S10, for additional
information.
A transformer filled with FR3 fluid complies
with the transformer temperature
operating range requirements defined inIEEE C57.12.00 and IEC 60076-1.

TABLE 1

Acceptable values for receipt of shipments of new FR3 fluid
PROPERTY

ASTM

Physical
Color
Flash Point PMCC (˚C)
Flash Point COC (˚C)
Fire Point (˚C)
Pour Point (˚C)
Density at 20˚C (g/cm3 )Relative Density (Specific Gravity) 15˚C
Viscosity (mm2/sec)

D1500
D93
D92
D92
D97
D1298
D445

ISO/IECISO 2211
ISO 2719
ISO 2592
ISO 2592
ISO 3016
ISO 3675

D1524

Biodegradation
Electrical
Dielectric Breakdown (kV)Dielectric Breakdown (kV)Gassing Tendency (mm/min)Dissipation Factor
25˚C (%)
90˚C (tan δ))
100˚C (%)
ChemicalCorrosive Sulfur
Water Content (mg/kg)
Acid Number (mg KOH/g)
PCB Content (mg/kg)
Oxidation Stability (48 hrs, 120˚C)
Total Acidity (mg KOH/g)
Viscosity at 40°C (mm2/sec)
Dissipation Factor at 90°C (tan δ)

10/16

IEC 61099 9.2
OECD 301

1mm gap
2mm gap
2.5mm gap

≤1.0
≥250
≥275
≥300
<-10

>300
≤-10

≤0.96

≤0.96

≤15
≤50
≤500

≤15
≤50

bright and clear

clear, free from sedimentand suspended matterreadily biodegradable

readily biodegradable

D877

≥30

D1816
D1816

≥20
≥35
≥35

IEC 60156
D2300

≤0

D924

≤0.20
≤0.05

IEC 60247
≤4.0

D924
D1275
D1533
D974
D4059

Unused new fluid
property requirements

ISO 3104100 ˚C
40 ˚C
0 ˚C
Visual Examination

As-received new fluid
property requirements

IEC 62697
IEC 60814
IEC 62021.3
IEC 61125C
IEC 62621.3
ISO 3104
IEC 60247

non-corrosive
≤200
≤0.06
not detectablenon-corrosive
≤200
≤0.06
free from PCBs
≤0.6
≤ 30% increase over initial≤ 0.5

NOTE: Specifications should be writtenreferencing only the defined ASTM or IEC
industry standard acceptance values andtest methods. The listed ‘typical’ values
are average values summarized from asignificant number of data points overmany years; they are not to be identified as
acceptance values.
ASTM D6871 Standard Specification for
Natural (Vegetable Oil) Ester Fluids Used inElectrical Apparatus.
IEC 62770: Fluids for electrotechnicalapplications – Unused natural esters
liquids for transformers and similarelectrical equipment.
1 Per OPPTS 835.3110
2 Per OECD 203, Method B
3 Per OECD 420
4 Less-Flammable Transformer Fluids,
Approval Guide – Electrical Equipment, FM
Approvals, FM Global, Norwood, MA, USA
5 EOVK.MH10678, Transformer Fluids, UL
Listed and Classified Products, Underwriters
Laboratories, Northbrook, IL, USA
EOUV.MH10678, Dielectric Mediums, UL
Listed and Classified Products, Underwriters
Laboratories, Northbrook, IL, USA;
6 National Electrical Code, NFPA 70, National
Fire Protection Association, Quincy, MA, USA
7 Transformers, 5-4, Property Loss Prevention
Sheets, FM Global, Norwood, MA, USA

The information presented herein is believed to betrue and accurate. However, all statements,
recommendations and suggestions are madewithout guarantee, express or implied, and are
subject to change without notice. WE DISCLAIM
ALL WARRANTIES, EXPRESS OR IMPLIED,INCLUDING WITHOUT LIMITATION THE IMPLIEDWARRANTIES OF MERCHANTABILITY, FITNESSFOR A PARTICULAR PURPOSE and FREEDOM
FROM INFRINGEMENT and disclaim all liability inconnection with the use of the products orinformation contained herein. All such risks are
assumed by the equipment manufacturer/user
and the final determination of suitability of each
use application is the responsibility of theequipment manufacturer/user. Products may
present unknown hazards and should be usedwith caution. Although certain hazards aredescribed herein, we do not guarantee that these
are the only hazards that exist.

1Envirotemp™ FR3™ Fluid

In addition to new distribution andpower class transformers, a variety
of other equipment, including
voltage regulators, sectionalizing
switches, transformer rectifiers, andelectromagnets use Envirotemp
FR3 fluid. The fluid is also used in
retrofill applications for transformers
and other fluid-filled distribution andpower equipment.

TABLE 2
Envirotemp™ FR3™ fluid’s Environmental Attributes

ENVIRONMENTAL AND HEALTH

Total Life Cycle Carbon Footprint
Overall Environmental impact

1/4th impact ofmineral oil

Department of Commerce
NIST BEES V4.0

Envirotemp FR3 fluid is specificallyformulated to help minimize healthand environmental risks. The baseoils come from renewable resources commodity seeds - and are recyclable
and reusable.
The US and California Environmental
Protection Agencies published
Envirotemp FR3 fluid’s Environmental
Technology Verification Reportin 2003. The verification processincludes biodegradation and toxicity
testing. Results from the aquaticbiodegradation test confirm thatEnvirotemp FR3 fluid’s rate ofbiodegradation is the same as thatof the standard reference material.
Envirotemp FR3 fluid meets the“ultimately biodegradable” criteria(Figure 1). When tested for acute oral
toxicity, Envirotemp FR3 fluid is nottoxic.
The Edible Oil Regulatory ReformAct (US Public Law 104-55, 1995)
makes Envirotemp FR3 fluid eligible forcurrent and future regulatory relief. The
options of alternative spill response
procedures, such as bio-based
remediation, are now available. The
fluid’s inherent viscosity and tendencyof thin layers to polymerize help
prevent migration along the surface
and into subsurface soils.
The EPA, Occupational Safety &Health Administration (OSHA), and theDepartment of Transportation (DOT)
do not list Envirotemp FR3 fluid ashazardous. Its Hazardous Material
Information System (HMIS) ratingis 1 for both health and reactivity.
Envirotemp FR3 fluid is not classified
as bio-accumulating or mutagenic.
It is not listed as a carcinogen by
National Toxicology Program (NTP),
in International Agency for Research
on Cancer (IARC) monographs, or by
OSHA Regulation. The products ofcomplete combustion of Envirotemp
82Attribute

Results

MethodAquatic Biodegradation [%]>99

EPA OPPTS 835.3100

Ready Biodegradation [%]>99

EPA OPPTS 835.3110

Acute Aquatic Toxicity

Non-toxic

OECD 203

Acute Oral Toxicity

Non-toxic

OECD 420>95%

USDA Biopreferred Program

Carbon Neutral

Department of Commerce
NIST BEES V4.0

Biobased Material Content

Figure 1.
Aerobic Aquatic Biodegradation Graph EPA Test OPPTS 835.3100
TABLE 3
Greenhouse gasesa attributed to transformer fluid for its complete life cycle.
Grams Per Unitb
Catagory

Mineral Oil

Envirotemp
FR3 Fluid

Raw Materials

1,048,184

Manufacturing544,363

Transportation
Use

Tons Per 1000 Gallons
Mineral Oil

Envirotemp
FR3 Fluid-381,590

2.306-0.839160,212

1.198

0.352

122,478

71,498

0.269

0.157

154,124

153,450

0.339

0.338

End of Life

30,82530,690

0.068

0.068

Total

1,899,973

34,260

4.180

0.075

a carbon dioxide equivalents
b In BEES 4.0e, one unit is a 1000 kVA transformer containing 500 gallons of fluid

FR3 fluid are essentially carbon dioxide
and water.

SUSTAINABILITY
Building for Environmental andEconomic Sustainability (BEES)
software8, available from the National
Institute of Standards and Technology,
uses a life-cycle assessment approach,analyzing raw material acquisition,

manufacture, transportation,
installation, use, and recycling andwaste management, to determine a
product’s global warming potential.
Table 3 shows the BEES amounts ofgreenhouse gas generated from raw
materials through end of life for mineral
oil and Envirotemp FR3 fluid. The
cost of mineral oil, in terms of carbon

BEES, Version 4.0e, Building and Fire Research Laboratory, National Institute of Standards and Technology, August 2007, http://www.bfrl.nist.gov/oae/software/bees/R2000emissions, is expensive. Meanwhile,
Envirotemp FR3 fluid is relatively
inexpensive, about 8.2 lb/gal lessgreen house gas emitted to produce
it. Additionally, the study reportsthat Envirotemp FR3 fluid’s overall
environmental performance impact
score is 1/4th that reported for mineraloil (and that’s without consideration
for Envirotemp FR3 fluid’s transformer
insulation life extending properties).
This cumulative score results fromadding the impacts of water intake,smog, ozone depletion, indoor air,human health, habitat alteration,
global warming, fossil fuel depletion,
eutrophication, ecological toxicity,
critical air pollutants, and acidification.
Envirotemp FR3 fluid, and transformers
filled with Envirotemp FR3 fluid arelisted in the US Federal BioPreferred
Products Program, making themreadily identifiable as BioPreferred
to all applicable Federal agencies.
Envirotemp FR3 fluid is an excellent
option for ISO 14000, Green Build, andother similar environmental programs
that promote the use of alternative,
environmentally preferable andsustainable materials and procedures.
SM

Figure 2.
Flash & Fire Point of Dielectric Fluids (°C).

FIRE SAFETY
Envirotemp FR3 fluid has a fire point ofapproximately 360°C, well above theminimum of 300°C required for highfire point fluid classifications. Its flash
point (approximately 330°C) is higher
than the fire point of most other ignition
resistant dielectric fluids in use today(Figure 2).
In laboratory and full-scale ignition
tests, Envirotemp FR3 fluid has
demonstrated greater fire resistancethan other dielectric fluid types. Basedon large-scale arc ignition testing, FM
Global concluded that the probabilityof a pool fire evolving from Envirotemp
Envirotemp FR3 fluid was so lowthat a heat release rate need not be
determined or considered for FM
Global approval.

Figure 3.
Fire Hazard Rating UL Standard 340.

Based on large-scale arc ignition and hot
metal ignition tests, FM Global recognizes
Envirotemp FR3 fluid as an equivalentsafeguard to space separation, firebarriers, and fire suppression systems formost installations.

containing 10,000 gallons of fluid or
less, transformers’ separation distanceto buildings and other equipment may
be up to 1/10th the distance required
for mineral oil filled transformers,
without fire walls or deluge systems.

FM Global recognizes Envirotemp FR3
fluid as a component of Approved
transformers per FM Global Standard
3990. When used in transformers

OSHA recognizes this FM Global
standard as fitting the definition ofa Listed and Labeled Product per
NEC Section 110-3(b). The standard

permits Envirotemp FR3 fluid-filledtransformers to be installed indoors,
typically without sprinklers or vaults,
with a minimum clearance to walls ofjust 3 feet (0.9M).
UL Standard 340 compares the fire
hazard ratings of various fluids. Figure
3 shows the favorable rating assigned
to Envirotemp FR3 fluid.

3

Envirotemp™ FR3™ Fluid

TABLE 4
Transformer Insulating Paper End-of-Life (Hours)

End-of-Life Basis
Retained Tensile
Strength50%
25%Degree ofPolymerization
200

150°C
Mineral Envirotemp
Oil
FR3 Fluid

IEEE
Basis

MineralOil

170°C
Envirotemp
FR3 Fluid

IEEE
Basis

3100
4000

>4000*>4000*

1602
3327

240
490

1300
4000

323
671

3200

>4000*

3697

480

3400

746

* Paper did not reach end-of-life over the duration of the test. To be conservative, extrapolation was not employed.

There are no known reports ofdielectric pool fires involving
Envirotemp FR3 fluid filledtransformers.

MEETING THE CODES
Less-Flammable fluids are recognized
as a fire safeguard in Section 15 of
the National Electrical Safety Code(Accredited Standards Committee
C2) for generation and distribution
substations. Envirotemp FR3 fluid
meets the National Electrical Code
Section 450-23 requirements as
a listed less-flammable liquid. It iscovered by OSHA Article §1910.305,
Section 5(v).
Envirotemp FR3 fluid is FM Global
Approved and Underwriters
Laboratories Classified “LessFlammable” per NEC Article
450-23, fitting the definition of a Listed
Product per NEC. For additional
information, request Cargill’s NEC
Requirement Guidelines 2008
Code Options for the Installation of
Listed Less-Flammable Liquid Filled
Transformers.

FLUID/PAPER INSULATIONSYSTEM
The unique chemical structure ofEnvirotemp FR3 fluid provides superior
insulation system performancecompared to other types of dielectric
fluids. The thermal properties ofEnvirotemp FR3 fluid make it a more
efficient coolant than higher molecularweight silicone and hydrocarbon
dielectric coolants.
Envirotemp FR3 fluid has an
exceptional ability to remove water
generated by aging paper. This
enables the fluid to significantly reduce
the aging rate of transformer insulating
paper. Per IEEE C57.100, accelerated

aging tests show that Thermally
Upgraded Paper (TUK) paper insulation
aged in Envirotemp FR3 fluid takes 5-8
times longer to reach the same endof-life points as TUK paper insulation
aged in conventional mineral oil.
Table 4 compares the time to reachinsulation end-of-life for TUK paper
aged in Envirotemp FR3 fluid andconventional transformer oil. The timeto insulation end-of-life calculatedusing the IEEE C57.91 loading guide isincluded for comparison. Accelerated
aging tests show similar thermal
aging improvement for non-thermally
upgraded Kraft paper.

APPLICATIONSNOTE: The suitability of eachapplication of Envirotemp FR3
fluid is the responsibility of theuser. Contact Cargill Envirotemp
FR3 Fluids group for application
guidelines.

New Transformers
Distribution and Power classtransformers filled with Envirotemp
FR3 fluid for indoor, submersible andoutdoor applications are available frommanufacturers worldwide.
For indoor applications, Envirotemp
FR3 fluid-filled transformers provide
the proven technical and performanceadvantages of liquid-filled designs over
dry types as well as a lower total life
cycle cost when compared to all othertransformer types.
Many types of Envirotemp FR3 fluidfilled transformers are in service:pole-mounted, pad-mounted,
networks, reactors, small, medium
and large substations, transmission
substations, and generator stepups. Envirotemp FR3 fluid-filledtransformers are accepted in bothindustry and government. Contact
Cargill Envirotemp FR3 Fluids groupfor a copy of the Envirotemp FR3 Fluid
User’s List, Bulletin B110.

Retrofilling Transformers
Envirotemp FR3 fluid is especiallysuited for upgrading the environmental
and fire safety of mineral oil-filledtransformers. It is miscible withmineral oil, high molecular weighthydrocarbons and other ester
fluids. FR3 fluid is not miscible withsilicone and should not be applied intransformers previously containing
silicone. FR3 fluid can also be used in
PCB (Askarel) replacement initiatives.
Unlike most other fluid types, theresidual transformer oil in a properly
retrofilled transformer should not
reduce the fire point of Envirotemp
FR3 fluid below the NEC minimumof 300°C (Figure 4). This is true evenafter full equilibrium has been achieved
between the replacement fluid and theresidual mineral oil in the paper.
Additional advantages of retrofillingwith Envirotemp FR3 fluid include
high dielectric strength, better matchof dielectric constant to Kraft paper
insulation, excellent lubricity, material
compatibility, and a coefficient ofexpansion similar to conventionaltransformer oil. Envirotemp FR3 fluid
has superior resistance to coking andsludge formation when compared
to conventional transformer oil. In
addition to passing the Power Factor
Valued Oxidation (PFVO) test, Doble
Laboratories’ Sludge-Free Life tests
resulted in no measurable sludge. The
fluid also acts as a drying agent fortransformer insulation that has become
wet from aging, extending the useful lifeof the transformer insulation system.

Switching Devices
With excellent dielectric strength
retention (Figure 5), lubricity, andgassing tendencies, Envirotemp FR3
fluid is an excellent switching medium
at normal operating temperatures.
Proven applications include new andretrofilled sectionalizing switches
and transformers with load breakaccessories such as Bay-O-Net andcurrent-limiting fusing, on-off and four
position switches, and Vacuum Fault
Interruption protection devices.

P.J. Hopkinson, L. Dix, “Tapchangers for De-energized Operation in Natural Ester Fluid, Mineral Oil, and Silicone” IEEE/PES Transmission & Distribution Conference & Exposition, July 26-30, 2009, Calgary
Canada94

R2000percent moisture saturation at timeof fluid manufacture, exposure time
to air should be minimized. Drum andtote storage should be indoors or
outdoors protected from the elements,
including sunlight. Refer to the Cargill
Envirotemp FR3 Fluid Storage andHandling Guide S10.

Figure 4.
Envirotemp™ FR3™ fluid Flash & Fire Point Variation with Conventional
Transformer Oil Content.

Note: To maintain the optimal fluid
properties for its intended use
as an electrical insulating fluid,
exposure to oxygen, moisture,and other contaminants must
be minimized. Except for shortstorage periods, material that has
been immersed in Envirotemp FR3
fluid should not be exposed to air.
Thin films of natural esters tend
to polymerize much faster thanconventional transformer oil. For
equipment drained of Envirotemp
FR3 fluid, it is recommended thatthe equipment be placed in an inert
gas environment, be re-immersed
in fluid, or rinsed with mineraloil. Where the transformer power
factor is a concern, hot air drying
is an unacceptable process for
assemblies already impregnatedwith a natural ester fluid. For
impregnated assemblies that
require additional drying, a methodof drying that does not expose
the impregnated insulation to air
is required to avoid excessiveoxidation of the dielectric fluid.

FLUID MAINTENANCE
Figure 5.
Fluid loadbreak dielectric strength retention comparison.

Accelerated life tests confirm stationary
contacts are most stable in Envirotemp
FR3 fluid9. In coking tests, Envirotemp
FR3 fluid produced less than 1/20thof the deposits that were produced inconventional mineral oil.
Due to the low temperature viscosity
difference of Envirotemp FR3 fluid
compared to conventional transformer
oil, the equipment manufacturer
should verify applications at low
ambient temperatures.

Other Applications
The inherent safety and performance
properties of Envirotemp FR3 fluid
have led to its application in electricalequipment other than transformers,
including industrial electromagnets,

superconducting motors, klystron
modulators, transformer/rectifiersets, and heat transfer applications.
Envirotemp FR3 fluid has excellent
lubricity, an important characteristic
for application in equipment withmoving parts. High voltage bushing
applications also appear promising
due to the fluid’s excellent ability tominimize insulating paper degradationand its low gassing tendency value ofapproximately -79 µl/min.

STORAGE AND HANDLING
Similar meticulous procedures forstoring and handling conventionaltransformer mineral oil should be
followed with Envirotemp FR3 fluid.
To help maintain the extremely low

Periodic preventive maintenancetests for Envirotemp FR3 fluid-filledequipment should follow the sameschedule used for transformers filledwith conventional transformer oil. Key
tests on fluid samples include:
1. Dielectric Strength: The IEEE
C57.147 minimum acceptable
ASTM D1816, 2mm gap limits forcontinued use of service-aged
Envirotemp FR3 fluid are 40 kV (≤69 kV), 47 kV (69 ≤ kV < 230), and50 kV (≥ 230 kV).
2. Flash Point and Fire Point. Small
amounts of mineral oil will notsignificantly reduce the fire point ofEnvirotemp FR3 fluid. Contamination
above 7% may lower the fire point
below 300°C. If contamination issuspected, the flash and fire points
should be measured.

5

Envirotemp™ FR3™ Fluid

FUNCTIONALSPECIFICATION FOR
NEW ENVIROTEMP
FR3 NATURAL ESTER
LESS-FLAMMABLE
TRANSFORMERDIELECTRIC COOLANT
1.0 Scope
1.1. This specification describes
a non-toxic (in acute aquatic10,
and oral toxicity11 tests),
biodegradable12, fire resistant,bio-based13 natural ester dielectric
fluid. It is intended for use inelectrical equipment as anenvironmentally preferred, lessflammable insulating and coolingmedium.
2.0 Requirements
2.1 Fluid Manufacturer
Figure 6.
Prior to shipment, Envirotemp™ FR3™
fluid undergoes extensive quality
assurance testing. The facility where
Envirotemp FR3 fluid is produced is
ISO 9001 Certified.

3. Dissolved gas analysis ofEnvirotemp FR3 fluid is particularly
useful for high value equipment orequipment servicing critical loads.
4. Color and appearance,
dissipation factor, acid number,resistivity, viscosity, andinterfacial tension are indicatorsof possible fluid contamination or
unusual degradation.
For fluid that cannot be reconditioned,
disposal options include sellingto lube oil recyclers, rendering
companies, or providers of fuel forindustrial boilers and furnaces. Used
fluid uncontaminated by controlled
hazardous materials does not fall under
the jurisdiction of the Federal Used Oil
Regulation (CFR Title 40 Part 279).

Fluid manufacturer shall havea minimum of ten (10) years
experience producing andtesting dielectric coolants.
Manufacturer upon request
shall provide AC withstandand impulse withstand for both
gap and creep from 3mm to150mm.
2.2 Dielectric Coolant
The dielectric coolant shall be abiobased biodegradable, be FM
Global Approved, UL® Classified
as a less-flammable fluid. It shallmeet the property limits listed
below. The base fluid shall be
100% derived from seed oils.
2.3	Acceptable values for receiptof shipments of new Enviotemp
FR3 fluid are shown in Table 1
2.4 	Environmental and Health Third
Party Validations
The fluid shall have a US EPA
Environmental Technology
Verification (ETV) Statement
published. The fluid shall meet
the test limits shown in Table 2
2.5 Packaging
The electrical insulating fluid
shall be furnished in sealed
vessels suitable for the purpose,including 5-gallon containers,
55-gallon drums, 330-gallon
totes, or in bulk. Each vessel

Per OECD 203, Method B
Per OECD 420
Per US EPA OPPTS 835.3100 and US EPA OPPTS 835.8110 (ii)13
Per USDA Biopreferred minimum biobased content for Fluid-Filled Transformers - Vegetable Oil-Based
10
11
12

6

shall have tampering indicating
devices.
3.0 Recommended Customer
Receiving Quality Control
3.1 Inspection
Each lot received shall be visibly
inspected for container integrity.
Verify that tamper proof seals
are intact and no leaks arevisible.
3.2 Receiving Tests
Samples shall be taken fromcontainers per ASTM D 923
Section 2.2, as follows:
Lot Size(gallons)

Number of Containers
Sampled600 or less1

601 - 3000

2-63001 or more

6 minimum(10% of quantity ofcontainers recommended)

When material will be combinedfor production, samples
may be mixed together inequal proportions to create acomposite sample for testing.
Minimum tests required are
dielectric strength and visualinspection. Dissipation factor
test is highly recommended,although not essential.
4.0 Important information
4.1 Storage
Avoid storing drums and totes
outdoors. Extreme temperature
variations can stress the integrityof container protective seals.
Exposure of totes to sunlight cancause fluid discoloration
4.2 Intended Use
The use of electrical insulating
and cooling fluid is generally
dictated by the engineering
design of the electricalapparatus. The electricalinsulating fluid covered by thisspecification is intended for use
as an insulating and coolingmedium in electrical equipment.

R20004.3 Fluid Transfer
When transferring electricalinsulating fluid from its originalcontainer, take care toprevent contamination withmoisture, dust, and foreign
matter. These impurities cancause deterioration of thedielectric strength and electricalperformance.
4.4 Partial Containers
Provide nitrogen blanket forpartially filled containers,
and properly seal to prevent
contamination.

Visit envirotempfluids.com for additional information.
7

© 2016 Cargill Incorporated
Envirotemp™, FR3™ are trademarks of Cargill Incorporated.
IEEE Standard C57.104-2008, IEEE Standard C57.91-2011, IEEE Standard C57.147-2008,
IEEE Standard C57.154-2012, 2017 National Electrical Safety Code (NESC), IEEE C2-2017,
IEC 62770:2013, IEC 60076-14:2013 are trademarks of the Institute of Electrical andElectronics Engineers, Inc., and the International Electrotechnical Commission.
UL® is a registered trademark of the Underwriters Laboratories Inc.
NEC® is a registered trademark of the National Electrical Code.
ANSI® is a registered trademark of the American National Standards Institute
FM Global® is a registered trademark of Factory Mutual Insurance Company
BioPreferred is a service mark of the The United States Department of Agriculture
SM

Cargill Industrial Specialties
P.O. Box 5700, MS 66
Minneapolis, MN 55440-5700
1-800-842-3631
envirotempfluids.com