ASTM D1389-07
(Test Method)Standard Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials (Withdrawn 2014)
Standard Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials (Withdrawn 2014)
SIGNIFICANCE AND USE
Occasional dielectric defects may be found in commercially available and acceptable thin electric insulating materials. More often than not, these materials are used in multiple layers. The probability that occasional dielectric weak spots will coincide from layer to layer is very small but increases with the frequency of occurrence of these defects. The proof-voltage test serves to indicate the frequency of occurrence of dielectric defects and facilitates the isolation of areas where the defects are excessive.
Some uses of thin electrical insulating materials require the complete absence of any dielectric defects. The proof-voltage test serves to locate dielectric defects, making possible repair or replacement of the area involved as may be desirable.
In the absence of detected faults, this test method is nondestructive to the material being evaluated, except as discussed in 1.2 and 4.3.
A critical part of the apparatus and procedure is the sensitivity and speed of response of the fault detection device. The latter is usually a circuit breaker. Depending upon the characteristics of this latter component, it is very likely that the results obtained using different sets of apparatus will exhibit significant variability.
It is essential that the fault detector respond only to fault currents and that fault currents above a pre-defined value always result in a fault detector response. The design, adjustment, and operation of the apparatus must avoid both erroneous functioning and any erroneous nonfunctioning of the fault detector that might be the result of charging currents, imbalance of impedance, or component malfunction.
The proof-voltage test has been used as a manufacturing control test and as an acceptance test to guarantee a minimum level of dielectric defects.
If this test method is used as an acceptance test, take care that the factors discussed in 5.4 and 5.5 have been considered, and if more than one set of apparatus is to be used, that comparabl...
SCOPE
1.1 This test method covers a general procedure for proof-voltage testing of thin solid electrical insulating materials at commercial power frequencies. It is intended to apply principally to flat materials but is applicable, with modification, to any form that permits continuously passing the material between suitable electrodes. ,
1.2 On extremely thin materials (usually less than 0.05 mm (0.002 in.)), the test results may be influenced more by mechanical damage caused by conditions of test than by dielectric defects. Consequently, this test method is not recommended for use with extremely thin materials, unless prior determination has established that the test results are not influenced by mechanical damage.
1.3 While the equipment and procedures described in this test method relate specifically to tests made with power frequency ac voltages, similar equipment and procedures are used for proof-voltage tests using dc voltages. To the extent that it applies to dc tests, this test method can serve as a guide for persons making such tests. However, only tests made with power frequency ac voltages can be said to be in accordance with this test method.
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. For specific hazard statements, see Section 7.
WITHDRAWN RATIONALE
This test method covers a general procedure for proof-voltage testing of thin solid electrical insulating materials at commercial power frequencies. It is intended to apply principally to flat materials but is applicable, with modification, to any form that permits continuously passing the material between suitable electrodes.
Formerly under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, ...
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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: D1389 − 07 AnAmerican National Standard
Standard Test Method for
Proof-Voltage Testing of Thin Solid Electrical Insulating
1
Materials
This standard is issued under the fixed designation D1389; 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* 2. Referenced Documents
4
2.1 ASTM Standards:
1.1 This test method covers a general procedure for proof-
D149 Test Method for Dielectric Breakdown Voltage and
voltage testing of thin solid electrical insulating materials at
DielectricStrengthofSolidElectricalInsulatingMaterials
commercial power frequencies. It is intended to apply princi-
at Commercial Power Frequencies
pally to flat materials but is applicable, with modification, to
D1711 Terminology Relating to Electrical Insulation
any form that permits continuously passing the material
2,3
between suitable electrodes.
3. Terminology
1.2 On extremely thin materials (usually less than 0.05 mm
3.1 Definitions:
(0.002 in.)), the test results may be influenced more by
3.1.1 For other definitions relating to electrical insulating
mechanical damage caused by conditions of test than by
materials, refer to Terminology D1711.
dielectric defects. Consequently, this test method is not recom-
3.1.2 proof voltage test, n—a procedure during which a
mended for use with extremely thin materials, unless prior
specified voltage is applied for a specified time between
determination has established that the test results are not
electrodes separated by a specimen located between the elec-
influenced by mechanical damage.
trodes to determine whether or not a specific current is
exceeded at that voltage.
1.3 While the equipment and procedures described in this
3.1.2.1 Discussion—If fixed electrodes are used, the voltage
test method relate specifically to tests made with power
is held for a specified time. If a large area (for example, a roll
frequency ac voltages, similar equipment and procedures are
containing sheet or film material) is being tested using roller,
used for proof-voltage tests using dc voltages. To the extent
brush, or blade electrodes, a velocity of material travel must be
that it applies to dc tests, this test method can serve as a guide
specified.
for persons making such tests. However, only tests made with
power frequency ac voltages can be said to be in accordance
4. Summary of Test Method
with this test method.
4.1 In this test method, sheet insulating material is passed at
1.4 This standard does not purport to address all of the
a specified speed between roller electrodes with a specified ac
safety concerns, if any, associated with its use. It is the
voltage applied, so that all, or nearly all, of the area of the
responsibility of the user of this standard to establish appro-
material is subjected to the specified voltage. The number of
priate safety and health practices and determine the applica-
electrical breakdowns and their locations are determined.
bility of regulatory limitations prior to use. For specific hazard
statements, see Section 7. 4.2 The applied proof voltage may be selected as a percent-
age of the dielectric breakdown voltage, as determined in
accordance with Test Method D149, or as a multiple of the
breakdown voltage for an air gap of equal thickness.
1
This test method is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
4.3 Unless the material being tested is known to have high
Subcommittee D09.12 on Electrical Tests.
resistance to partial discharges, the proof voltage is ordinarily
Current edition approved May 1, 2007. Published June 2007. Originally
selected to be below the visible corona level. If it is necessary
approved in 1956. Last previous edition approved in 2006 as D1389 – 06. DOI:
10.1520/D1389-07.
to test at a voltage at which visible corona will be present, the
2
Bartnikas, R., Chapter 3, “High Voltage Measurements,” Electrical Properties
of Solid Insulating Materials, Measurement Techniques, Vol. IIB, Engineering
Dielectrics, R. Bartnikas, Editor, ASTM STP 926, ASTM, Philadelphia, 1987.
3 4
Nelson, J. K., Chapter 5, “Dielectric Breakdown of Solids,” Electrical For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Properties of Solid Insulating Materials: Molecular Structure and Electrical contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Behavior, Vol. IIA, Engineering Dielectrics, R. Bartnikas and R. M. Eichorn, Standards volume information, refer to the standard’s Document Summary page on
Editors, ASTM STP 783, ASTM, Philadelphia, 1983. the AST
...
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