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About This Item
Full Description
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 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.
1.3 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.
1.4 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.
Document History
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ASTM D2307-21
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Most Recent
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ASTM D2307-07a(2013)
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version
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ASTM D2307-07(2013)
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Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version
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ASTM D2307-07a
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version
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ASTM D2307-07
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version
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ASTM D2307-05
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version
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ASTM D2307-01
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version
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ASTM D2307-95
Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire- Historical Version