ASTM D3955-20 PDF

Scope: 1.1 This specification covers the tests and values for electrical insulating varnishes, as supplied, which are suitable for the impregnation and treatment of electrical coils and windings applied by dip process. 1.2 Varnishes, flexible or rigid, included in this specification are: Grade DA—Air-dry Grade DO—Organic solvent containing, baking, Grade DM—Reactive diluent containing, Grade DS—Silicone, Grade DW—Water containing, and Grade DT—Thixotropic. 1.3 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—This specification resembles IEC 60455 in title only. The content is significantly different. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D3955-20 Referenced Document

ASTM D115 Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
ASTM D1711 Standard Terminology Relating to Electrical Insulation
ASTM D2519 Standard Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test
ASTM D3056 Standard Test Method for Gel Time of Solventless Varnishes*， 2023-10-01 Update
ASTM D3145 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
ASTM D3251 Standard Test Method for Thermal-Aging Characteristics of Electrical Insulating Varnishes Applied Over Film-Insulated Magnet Wire
ASTM D3278 Standard Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
ASTM D4733 Standard Test Methods for Solventless Electrical Insulating Varnishes
ASTM D4880 Standard Test Method for Salt Water Proofness of Insulating Varnishes Over Enamelled Magnet Wire
ASTM D5637 Standard Test Method for Moisture Resistance of Electrical Insulating Varnishes
ASTM D5638 Standard Test Method for Chemical Resistance of Electrical Insulating Varnishes
ASTM D93 Standard Test Methods for Flash-Point by Pensky-Martens Closed Cup Tester

2020 ASTM D3955-20 Standard Specification for Electrical Insulating Varnishes
2013 ASTM D3955-13 Standard Specification for Electrical Insulating Varnishes
2004 ASTM D3955-04(2009) Standard Specification for Electrical Insulating Varnishes
2004 ASTM D3955-04 Standard Specification for Electrical Insulating Varnishes
1999 ASTM D3955-99 Standard Specification for Electrical Insulating Varnishes