ASTM D5642-99(2004)
(Test Method)Standard Test Method for Sealed Tube Chemical Compatibility Test
Standard Test Method for Sealed Tube Chemical Compatibility Test
SIGNIFICANCE AND USE
This test method is useful for evaluating a combination of materials for potential use in an electrical insulation system.
SCOPE
1.1 This test method covers procedures for evaluating the interaction of electrical insulation components used, or intended to be used, in electrical insulation systems.
1.2 This test method is useful for determining compatibility but additional testing may be required depending upon application.
1.3 This test method may also provide useful information about the behavior of selected insulating materials when compared to a reference value as opposed to a reference system.
1.4 This test method does not cover systems which operate in liquids or gases other than air.
1.5 The values stated in SI units are the standard in this test method.
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 and health practices and determine the applicability of regulatory limitations prior to use. See also Notes 3, 4 and 8.3.2.1.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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An American National Standard
Designation:D5642–99 (Reapproved 2004)
Standard Test Method for
Sealed Tube Chemical Compatibility Test
This standard is issued under the fixed designation D5642; 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 3. Terminology
1.1 This test method covers procedures for evaluating the 3.1 Definitions:
interaction of electrical insulation components used, or in- 3.1.1 magnet wire—See Terminology D1711 for the defini-
tended to be used, in electrical insulation systems. tion of this term.
1.2 This test method is useful for determining compatibility 3.2 Definitions of Terms Specific to This Standard:
but additional testing may be required depending upon appli- 3.2.1 aging test, n—a process of exposure, to a specified set
cation. of conditions for a defined period of time, which results in an
1.3 This test method may also provide useful information irreversible change in one or more physical, chemical, electri-
about the behavior of selected insulating materials when cal, or thermal characteristics of a material.
compared to a reference value as opposed to a reference 3.2.2 candidate system, n—the proposed electrical insula-
system. tion system to be evaluated.
1.4 This test method does not cover systems which operate 3.2.3 electrical insulation system, n—an intimate combina-
in liquids or gases other than air. tion of insulating materials with conductors, as used in elec-
1.5 The values stated in SI units are the standard in this test trical equipment.
method. 3.2.4 insulation system class, n—a standardized designation
1.6 This standard does not purport to address all of the of the temperature capability of the electrical insulation sys-
safety concerns, if any, associated with its use. It is the tem. It is expressed by both numbers and letters as follows:
responsibility of the user of this standard to establish appro-
System Class
105 (A)
priate safety and health practices and determine the applica-
120 (E)
bility of regulatory limitations prior to use. See also 8.2.4,
130 (B)
8.3.1 and 8.3.2.1 155 (F)
180 (H)
200 (N)
2. Referenced Documents
220 (R)
2.1 ASTM Standards:
240 (S)
D149 Test Method for Dielectric Breakdown Voltage and
3.2.5 reference system, n—an electrical insulation system
Dielectric Strength of Solid Electrical Insulating Materials
which has been previously evaluated and found acceptable.
at Commercial Power Frequencies
3.2.6 twisted pair, n—film-insulated round magnet wire that
D1676 Test Methods for Film-Insulated Magnet Wire
has been prepared in accordance with Test Methods D1676.
D1711 Terminology Relating to Electrical Insulation
4. Summary of Test Method
4.1 Acombinationofspecificmaterialsissealedinalimited
This test method is under the jurisdiction of ASTM Committee D09 on
space and subjected to a specific elevated temperature for a
Electrical and Electronic Insulating Materials and is the direct responsibility of
specified time. Following this exposure the dielectric break-
Subcommittee D09.17 on Thermal Characteristics.
down voltage of the insulated conductors is used as a basis for
Current edition approved March 10, 1999. Published May 1999. Originally
approved in 1994. Last previous edition approved in 1997 as D5642 – 97. DOI: judging the compatibility of the candidate system.
10.1520/D5642-99R04.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5. Significance and Use
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 This test method is useful for evaluating a combination
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of materials for potential use in an electrical insulation system.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5642–99 (2004)
6. Apparatus 8.1.5 Certain materials, including but not limited to hygro-
scopic papers, may require additional conditioning to remove
6.1 Oven, capable of maintaining the required exposure
moisture. If agreed upon by interested parties, higher tempera-
temperature within 63 °C.
tures and times for drying may be used. Select a time and
6.2 Glass Tubes with inside volume not exceeding 900 mL
temperature that do not cause loss of other volatile materials or
that can be sealed. Two general types are described as follows:
cause thermal decomposition.
6.2.1 Flanged High Temperature Glass Tubes which are
8.1.6 Seal tubes within 1 min after conditioning, and leak
designed to be sealed with metal rings and gaskets are
test immediately thereafter in accordance with 8.1.6.2.
preferred.
8.1.6.1 Seal flanged glass tubes by applying a sufficient
6.2.2 Glass Tubes, which can be fusion sealed after the
torque to ensure a seal that is leak free.Atorque of 3.4 N·m (30
addition of all materials are acceptable alternatives.
inch-pounds) in increments of 0.56 N·m (5 inch-pounds),
6.3 Gasket Materials for use with tubes described in 6.2.1.
alternating between bolts to tighten evenly and securely has
6.3.1 Type TFE (Tetrafluoroethylene) or FEP (Perfluoroet-
been found acceptable for this purpose.
hylene Propylene) Fluorocarbon.
8.1.6.2 Check glass tubes for leaks using the following
6.3.2 Hexafluoropropylene—vinylidene fluoride elastomer
procedure: Submerge the still warm tubes into room tempera-
can be used for exposure temperatures not exceeding 155 °C.
6.4 Apparatus in conformance with Test Method D149 to ture tap water for a minimum of 2 min. Observe the tubes after
they have reached room temperature for condensation on the
measure dielectric breakdown voltage.
inner walls. Condensation is a result of leakage.
7. Material Specimens 8.1.6.3 Do not use tubes that exhibit leakage.
8.2 Aging:
7.1 The specific list of materials to be tested is to be
8.2.1 Place the tubes into an oven that is at room tempera-
established by agreement between interested parties.
ture.
7.2 Represent each of the non-metallic components of the
8.2.2 Apply power to the oven and allow it to attain the
electrical insulation system, with the exception of an impreg-
aging temperature.
nating varnish and insulated conductors, with a specimen
8.2.2.1 Sealed tubes may be placed into a heated oven, but
having a minimum mass of 250 mg.
it should be recognized that the thermal shock will cause
7.3 Insulated Conductor Specimens:
stresses that may result in cracking of the glass tubes. Do not
7.3.1 Use film insulated magnet wire twisted pairs con-
use any tubes that crack as a r
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