ASTM D3145-13
Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
- Standard No.
- ASTM D3145-13
- Release Date
- 2013
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D3145-18
- Latest
- ASTM D3145-20
- Scope
5.1 This test method is used to determine the effect of exposure to elevated temperatures on the bond strength of combinations of magnet wire insulations and electrical insulating varnishes. The results are used as a guide for the comparison and selection of varnishes and combinations of varnishes and magnet wire insulation for specific applications. Test Methods D1932 and D3251describe additional tests for determining the thermal endurance of insulating varnishes. A comprehensive evaluation of thermal characteristics includes a comparison of the thermal endurance determined in these different ways.
5.2 This test method is useful for research and product qualifications purposes.
1.1 This test method covers the determination of the thermal endurance of electrical insulating varnishes alone or in combinations with magnet wire insulation. Changes in the helical coil bond strength are used as the test criteria. The coils are made from bare aluminum or copper wire, or from film- or fiber-insulated magnet wire.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Note 1—There is no similar or equivalent IEC standard.1.3 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 a specific precautionary statement, see Section 7.
ASTM D3145-13 Referenced Document
- ASTM D1711 Standard Terminology Relating to Electrical Insulation
- ASTM D1932 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
- ASTM D2307 Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire
- ASTM D2519 Standard Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test
- ASTM D3251 Standard Test Method for Thermal-Aging Characteristics of Electrical Insulating Varnishes Applied Over Film-Insulated Magnet Wire
- ASTM D5423 Standard Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation
- ASTM D618 Standard Practice for Conditioning Plastics for Testing
ASTM D3145-13 history
- 2020 ASTM D3145-20 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by Helical Coil Method
- 2018 ASTM D3145-18 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
- 2013 ASTM D3145-13 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
- 2008 ASTM D3145-08 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
- 2003 ASTM D3145-03 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
- 2001 ASTM D3145-01 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
- 1997 ASTM D3145-97 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
