ASTM D3955-04(2009)

Standard Specification for Electrical Insulating Varnishes

STANDARD published on 1.10.2009

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The information about the standard:

Designation standards: ASTM D3955-04(2009)
Note: WITHDRAWN
Publication date standards: 1.10.2009
SKU: NS-25476
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Annotation of standard text ASTM D3955-04(2009) :

Keywords:

varnish, air-dry, varnish, electrical, varnish, silicone, varnish, solvent containing, varnish, thixotropic, varnish, water containing, Electrical coils/windings, Electrical insulating materials--specifications, Electrical insulating varnishes--specifications, Impregnation procedures, ICS Number Code 29.035.60 (Varnished fabrics)

Additional information

1. 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.

2. Referenced Documents

D4733-24	Standard Test Methods for Solventless Electrical Insulating Varnishes
D4880-18(2025)	Standard Test Method for Salt Water Proofness of Insulating Varnishes Over Enamelled Magnet Wire
D93-26	Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D5637-24	Standard Test Method for Moisture Resistance of Electrical Insulating Varnishes
D5638-18(2025)	Standard Test Method for Chemical Resistance of Electrical Insulating Varnishes
D115-17(2024)	Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
D1711-26	Standard Terminology Relating to Electrical Insulation
D2519-19a(2025)	Standard Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test (Includes all amendments and changes 12/23/2025).
D3056-23	Standard Test Method for Gel Time of Solventless Varnishes
D3145-20(2025)	Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by Helical Coil Method
D3251-19(2025)	Standard Test Method for Thermal Endurance Characteristics of Electrical Insulating Varnishes Applied Over Film-Insulated Magnet Wire
D3278-21	Standard Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus

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