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ASTM D8240-22

(Specification)

Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus

Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus

SCOPE
1.1 This specification covers less-flammable (high fire point) synthetic ester insulating liquids for use as a dielectric and cooling in new and existing electrical power apparatus including power and distribution transformers, switchgear, and other associated equipment  
1.2 Synthetic ester insulating liquids differ from conventional mineral oil and other less-flammable (high fire point) liquids in that they are products derived from the chemical reaction, processing, and physical treatments of a carboxylic acid and an alcohol.  
1.3 This specification is intended to define synthetic ester electrical insulating liquids that are compatible with typical materials of construction of existing apparatus and are expected to maintain their functional characteristics in these applications. The material described in this specification is not always miscible with other electrical insulating liquids. The user should contact the manufacturer of the synthetic ester insulating liquid for guidance in this respect.  
1.4 This specification applies only to unused synthetic ester insulating liquids as received prior to any processing. The user should contact the manufacturer of the equipment or liquid, or both, if questions of recommended characteristics or liquid maintenance procedures arise.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Historical
Publication Date
14-Jul-2022
ICS
29.040.10 - Insulating oils
29.080.01 - Electrical insulation in general
Technical Committee
D27 - Electrical Insulating Liquids and Gases
Drafting Committee
D27.02 - Gases and Non-Mineral Oil Liquids
Current Stage
Ref Project

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ASTM D8240-22 - Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical ApparatusASTM D8240-22 - Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus
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ASTM D8240-22 - Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D8240 −22
Standard Specification for
Less-Flammable Synthetic Ester Liquids Used in Electrical
1
Apparatus
This standard is issued under the fixed designation D8240; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This specification covers less-flammable (high fire
Barriers to Trade (TBT) Committee.
point) synthetic ester insulating liquids for use as a dielectric
and cooling in new and existing electrical power apparatus
2. Referenced Documents
including power and distribution transformers, switchgear, and
2
other associated equipment 2.1 ASTM Standards:
D92 Test Method for Flash and Fire Points by Cleveland
1.2 Synthetic ester insulating liquids differ from conven-
Open Cup Tester
tional mineral oil and other less-flammable (high fire point)
D97 Test Method for Pour Point of Petroleum Products
liquids in that they are products derived from the chemical
D117 Guide for Sampling, Test Methods, and Specifications
reaction, processing, and physical treatments of a carboxylic
for Electrical Insulating Liquids
acid and an alcohol.
D445 Test Method for Kinematic Viscosity of Transparent
1.3 This specification is intended to define synthetic ester
and Opaque Liquids (and Calculation of Dynamic Viscos-
electrical insulating liquids that are compatible with typical
ity)
materials of construction of existing apparatus and are ex-
D923 Practices for Sampling Electrical Insulating Liquids
pected to maintain their functional characteristics in these
D924 Test Method for Dissipation Factor (or Power Factor)
applications. The material described in this specification is not
and Relative Permittivity (Dielectric Constant) of Electri-
always miscible with other electrical insulating liquids. The
cal Insulating Liquids
user should contact the manufacturer of the synthetic ester
D974 Test Method for Acid and Base Number by Color-
insulating liquid for guidance in this respect.
Indicator Titration
D1275 Test Method for Corrosive Sulfur in Electrical Insu-
1.4 This specification applies only to unused synthetic ester
insulating liquids as received prior to any processing. The user lating Liquids
D1298 Test Method for Density, Relative Density, or API
should contact the manufacturer of the equipment or liquid, or
both, if questions of recommended characteristics or liquid Gravity of Crude Petroleum and Liquid Petroleum Prod-
ucts by Hydrometer Method
maintenance procedures arise.
D1524 Test Method for Visual Examination of Used Elec-
1.5 The values stated in SI units are to be regarded as
trical Insulating Liquids in the Field
standard. No other units of measurement are included in this
D1533 Test Method for Water in Insulating Liquids by
standard.
Coulometric Karl Fischer Titration
1.6 This standard does not purport to address all of the
D1816 Test Method for Dielectric Breakdown Voltage of
safety concerns, if any, associated with its use. It is the
Insulating Liquids Using VDE Electrodes
responsibility of the user of this standard to establish appro-
D1903 Practice for Determining the Coefficient of Thermal
priate safety, health, and environmental practices and deter-
Expansion of Electrical Insulating Liquids of Petroleum
mine the applicability of regulatory limitations prior to use.
Origin, and Askarels
1.7 This international standard was developed in accor-
D2129 Test Method for Color of Clear Electrical Insulating
dance with internationally recognized principles on standard-
Liquids (Platinum-Cobalt Scale)
ization established in the Decision on Principles for the
D2300 Test Method for Gassing of Electrical Insulating
1
This specification is under the jurisdiction of ASTM Committee D27 on
2
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mittee D27.02 on Gases and Non-Mineral Oil Liquids. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved July 15, 2022. Published August 2022. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D8240-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8240−22
Liquids Under Electrical Stress and Ionization (Modified International Electrotechnical Commission 61125 Test
Pirelli Method) methods for oxidation stability – T
...

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1.1 This specification covers less-flammable (high fire point) synthetic ester insulating liquids for use as a dielectric and cooling in new and existing electrical power apparatus including power and distribution transformers, switchgear, and other associated equipment  
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