ASTM D5637-05(2017)
(Test Method)Standard Test Method for Moisture Resistance of Electrical Insulating Varnishes
Standard Test Method for Moisture Resistance of Electrical Insulating Varnishes
SIGNIFICANCE AND USE
5.1 This test method is useful for the evaluation of insulating varnish performance in high humidity exposure.
SCOPE
1.1 This test method covers the mechanical performance of electrical insulating varnishes subjected to high humidity conditions.
1.2 The values stated in SI units are to be regarded as standard.
1.3 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. See 7.1.
Note 1: There is not ISO or IEC equivalent.
1.4 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
Relations
Standards Content (Sample)
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.
Designation: D5637 − 05 (Reapproved 2017)
Standard Test Method for
Moisture Resistance of Electrical Insulating Varnishes
This standard is issued under the fixed designation D5637; 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 4. Summary of Test Method
1.1 This test method covers the mechanical performance of 4.1 Flexural strength tests are made on varnish-treated
electrical insulating varnishes subjected to high humidity helical coils to determine the force required to break the coil
conditions. under specified conditions both before and after exposure to
high humidity conditions.
1.2 The values stated in SI units are to be regarded as
standard.
5. Significance and Use
1.3 This standard does not purport to address all of the
5.1 This test method is useful for the evaluation of insulat-
safety concerns, if any, associated with its use. It is the
ing varnish performance in high humidity exposure.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
6. Apparatus
mine the applicability of regulatory limitations prior to use.
See 7.1.
6.1 Tensile Testing Machine—See Test Method D2519.
NOTE 1—There is not ISO or IEC equivalent. 6.2 Test Fixture—See Test Method D2519.
1.4 This international standard was developed in accor-
6.3 Exposure Chamber—Achamber capable of maintaining
dance with internationally recognized principles on standard-
a minimum of 100 % relative humidity with condensation, at
ization established in the Decision on Principles for the
30 6 1°C.
Development of International Standards, Guides and Recom-
NOTE 2—The exposure chamber described in IEEE 117 has been found
mendations issued by the World Trade Organization Technical
suitable.
Barriers to Trade (TBT) Committee.
7. Safety Precautions
2. Referenced Documents
7.1 It is unsafe to use liquid varnish at temperatures above
2.1 ASTM Standards:
the flash point without adequate ventilation, especially if the
D2519 Test Method for Bond Strength of Electrical Insulat-
possibility exists that flames or sparks are present. Store
ing Varnishes by the Helical Coil Test
varnish in sealed containers.
2.2 IEEE Standard:
IEEE 117 Standard Test Procedure for Evaluation of Sys-
8. Test Specimens
tems of Insulating Materials for Randon-WoundAC Elec-
8.1 Prepare a minimum of ten test specimens in accordance
tric Machinery
withTestMethodD2519usingawiremutuallyagreeduponby
interested parties.
3. Terminology
3.1 See Test Method D2519.
9. Procedure
9.1 Condition half of the test specimens in the exposure
This test method is under the jurisdiction of ASTM Committee D09 on
chamber maintaining a minimum of 98 % relative humidity for
Electrical and Electronic Insulating Materials and is the direct responsibility of
336 61h.
Subcommittee D09.01 on Electrical Insulating Products.
Current edition approved Nov. 1, 2017. Published November 2017. Originally
9.2 Test specimens both conditioned and unconditioned as
approved in 1994. Last p
...
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