ASTM D6180-05
(Test Method)Standard Test Method for Stability of Insulating Oils of Petroleum Origin Under Electrical Discharge (Withdrawn 2014)
Standard Test Method for Stability of Insulating Oils of Petroleum Origin Under Electrical Discharge (Withdrawn 2014)
SIGNIFICANCE AND USE
During this test, insulating oil in an evacuated cell is subjected to a high voltage discharge between two electrodes. The discharge generates free electrons. These electrons collide with the oil molecules causing many of them to become electronically excited. Some of these molecules lose this energy as a quanta of light emitting fluorescent radiation. Some of the other excited molecules decompose into gases, ionized molecules and free radicals. These changes can provide an indication of the stability of oils under the conditions of this test method. The measures of these changes are the increase of the pressure in the test cell and the increase in the dissipation factor of the test specimen.
During the test, the gas content increases in the cell and the concentration of charge carriers increases in the oil.
SCOPE
1.1 This test method covers a laboratory technique that measures the stability of new, used, or reclaimed insulating oils, similar to those described in Specification D 3487 in the presence of a controlled electric discharge. When subjected to this type of discharge, insulating oils absorb energy and produce gases as well as ionized molecules (charge carriers). The quantity of these decay products can be measured and can provide an indication of the stability of oils under the conditions of this test.
1.2 The gases are retained in the discharge cell and their pressure measured. The charge carriers remain in the test specimen. The change in the dissipation factor before and after the discharge is determined.
1.3 The values stated in SI units are to be regarded as the standard. The values stated in parentheses are for information only.
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific cautionary statements are given in and .
WITHDRAWN RATIONALE
This test method covers a laboratory technique that measures the stability of new, used, or reclaimed insulating oils, similar to those described in Specification D3487 in the presence of a controlled electric discharge.
Formerly under the jurisdiction of Committee D27 on Electrical Insulating Liquids and Gases, this test method was withdrawn in January 2014 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
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Standards Content (Sample)
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: D6180 − 05
StandardTest Method for
Stability of Insulating Oils of Petroleum Origin Under
1
Electrical Discharge
This standard is issued under the fixed designation D6180; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 IEEE Standard:
4–1995IEEE Standard Techniques for High-Voltage Test-
1.1 This test method covers a laboratory technique that
3
ing
measures the stability of new, used, or reclaimed insulating
oils, similar to those described in Specification D3487 in the
3. Summary of Test Method
presence of a controlled electric discharge. When subjected to
3.1 A test specimen is introduced into a discharge cell and
this type of discharge, insulating oils absorb energy and
degassed under vacuum at room temperature. An ac potential
produce gases as well as ionized molecules (charge carriers).
of 10 kV is applied between a high voltage electrode and a
The quantity of these decay products can be measured and can
grounded salt water electrode for 300 min. The gradual rise of
provide an indication of the stability of oils under the condi-
the pressure inside the discharge cell is measured on an
tions of this test.
electronic vacuum meter as a function of time.The dissipation
1.2 The gases are retained in the discharge cell and their
factor of the oil at 100°C is determined before and after the
pressure measured. The charge carriers remain in the test
stability test.
specimen.Thechangeinthedissipationfactorbeforeandafter
the discharge is determined.
4. Significance and Use
1.3 The values stated in SI units are to be regarded as the
4.1 During this test, insulating oil in an evacuated cell is
standard. The values stated in parentheses are for information
subjected to a high voltage discharge between two electrodes.
only.
The discharge generates free electrons.These electrons collide
with the oil molecules causing many of them to become
1.4 This standard does not purport to address all of the
electronically excited. Some of these molecules lose this
safety concerns, if any, associated with its use. It is the
energyasaquantaoflightemittingfluorescentradiation.Some
responsibility of the user of this standard to establish appro-
of the other excited molecules decompose into gases, ionized
priate safety and health practices and determine the applica-
molecules and free radicals. These changes can provide an
bility of regulatory limitations prior to use.Specificcautionary
indication of the stability of oils under the conditions of this
statements are given in 5.3 and 7.1.
test method.The measures of these changes are the increase of
2. Referenced Documents
the pressure in the test cell and the increase in the dissipation
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factor of the test specimen.
2.1 ASTM Standards:
D923Practices for Sampling Electrical Insulating Liquids
4.2 During the test, the gas content increases in the cell and
D924Test Method for Dissipation Factor (or Power Factor)
the concentration of charge carriers increases in the oil.
and Relative Permittivity (Dielectric Constant) of Electri-
5. Apparatus
cal Insulating Liquids
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D3487Specification for Mineral Insulating Oil Used in
5.1 Discharge Cell, shown in Fig. 1, includes an electronic
Electrical Apparatus
vacuummeter.Thecellmustbemadeofquartz,beofspherical
shape, and have a 500 mL capacity. The electrode is sealed in
1 the cell as shown in Fig. 1.The free electrons are generated by
This test method is under the jurisdiction of ASTM Committee D27 on
Electrical Insulating Liquids and Gasesand is the direct responsibility of Subcom-
mittee D27.05 on Electrical Test.
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Current edition approved Oct. 1, 2005. Published October 2005. Originally Available from the Institute of Electrical and Electronic Engineers, Inc., P.O.
approved in 1997. Last previous edition approved in 2004 as D 6180-98(2004). Box 1331, Piscataway, NJ 08855.
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DOI: 10.1520/D6180-05. The sole source of supply of the discharge cell known to the committee at this
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or time is Insoil Canada Ltd., 231 Hampshire Place, N.W., Calgary, AB Canada T3A
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4Y7. If you are aware of alternative suppliers, please provide this information to
Standards volume information, refer to the standard’s Document Summary page on ASTM International Headquarters. Your comments will receive careful consider-
1
the ASTM website. ation at a meeting of the responsible technical committee , which you may attend.
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