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ASTM D3145

2013 Edition, November 1, 2013

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Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method



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Product Details:

  • Revision: 2013 Edition, November 1, 2013
  • Published Date: November 1, 2013
  • Status: Active, Most Current
  • Document Language: English
  • Published By: ASTM International (ASTM)
  • Page Count: 3
  • ANSI Approved: Yes
  • DoD Adopted: Yes

Description / Abstract:

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. 

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. 

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.

*A Summary of Changes section appears at the end of this standard