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  • ASTM
    D3955-13 Standard Specification for Electrical Insulating Varnishes
    Edition: 2013
    $82.37
    Unlimited Users per year

Description of ASTM-D3955 2013

ASTM D3955 - 13

Standard Specification for Electrical Insulating Varnishes

Active Standard ASTM D3955 | Developed by Subcommittee: D09.01

Book of Standards Volume: 10.02




ASTM D3955

Abstract

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. The varnishes are classified according to grades: Grade DA; Grade DO; Grade DM; Grade DS; Grade DW; and Grade DT. This specification covers both flexible and rigid, solvent and solventless insulating varnishes. The insulating varnishes are classified according to thermal classes: Class 130; Class 155; Class 180; Class 200; and Class 220. Quality conformance tests shall be performed to conform to the specified requirements.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D93 Test Methods for Flash Point by Pensky-Martens Closed Cup Tester

D115 Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation

D1711 Terminology Relating to Electrical Insulation

D2519 Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test

D3056 Test Method for Gel Time of Solventless Varnishes

D3145 Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method

D3251 Test Method for Thermal Endurance Characteristics of Electrical Insulating Varnishes Applied Over Film-Insulated Magnet Wire

D3278 Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus

D4733 Test Methods for Solventless Electrical Insulating Varnishes

D4880 Test Method for Salt Water Proofness of Insulating Varnishes Over Enamelled Magnet Wire

D5637 Test Method for Moisture Resistance of Electrical Insulating Varnishes

D5638 Test Method for Chemical Resistance of Electrical Insulating Varnishes


Keywords

varnish, air-dry; varnish, electrical; varnish, silicone; varnish, solvent containing; varnish, thixotropic; varnish, water containing;


ICS Code

ICS Number Code 29.035.60 (Varnished fabrics)


DOI: 10.1520/D3955-13

ASTM International is a member of CrossRef.

ASTM D3955

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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