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ASTM D2307-07

Historical Revision

Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire

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1.1 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.

1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units in parentheses are provided for information only.

1.3 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.

1.4 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.

1.5 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.

1.6 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.


SDO ASTM: ASTM International
Document Number D2307
Publication Date Jan. 1, 2007
Language en - English
Page Count 9
Revision Level 07
Supercedes
Committee D09.17
Publish Date Document Id Type View
July 1, 2021 D2307-21 Revision
Oct. 1, 2007 D2307-07A Revision
Jan. 1, 2007 D2307-07 Revision
Sept. 1, 2005 D2307-05 Revision
Sept. 10, 2001 D2307-95 Revision
Sept. 10, 2001 D2307-01 Revision
April 1, 2013 D2307-07AR13 Reaffirmation