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Document ASTM D 2307 REV A is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
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ASTM D 2307 REV A Document Information:
Title
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire
ASTM International
Publication Date:
Oct 1, 2007
Scope:
This test method covers determination of the thermal endurance
of film-insulated round magnet wire in air at atmospheric pressure.
It is not applicable to magnet wire with fibrous insulation, such
as cotton or glass.
The values stated in inch-pound units are to be regarded as the
standard. The SI units in parentheses are provided for information
only.
This test method covers the evaluation of thermal endurance by
observing changes in response to ac proof voltage tests. The
evaluation of thermal endurance by observing changes in other
properties of magnet wire insulation requires the use of different
test methods.
It is possible that exposure of some types of film insulated
wire to heat in gaseous or liquid environments in the absence of
air will give thermal endurance values different from those
obtained in air. Consider this possibility when interpreting the
results obtained by heating in air with respect to applications
where the wire will not be exposed to air in service.
It is possible that electric stress applied for extended periods
at a level exceeding or even approaching the discharge inception
voltage will change significantly the thermal endurance of film
insulated wires. Under such electric stress conditions, it is
possible that comparisons between materials will also differ from
those developed using this method.
This test method is similar to IEC 60172. Differences exist
regarding specimen preparation.
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.
*A Summary of Changes section appears at the end of this
standard.
Keywords:
- correlation coefficient
- linearity
- magnet wire
- temperature index
- thermal endurance
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