ASTM D4733 - 13

    Standard Test Methods for Solventless Electrical Insulating Varnishes

    Active Standard ASTM D4733 | Developed by Subcommittee: D09.01

    Book of Standards Volume: 10.02


      Format Pages Price  
    PDF 6 $43.00   ADD TO CART
    Hardcopy (shipping and handling) 6 $43.00   ADD TO CART
    Standard + Redline PDF Bundle 12 $51.60   ADD TO CART


    Significance and Use

    4.1 The test methods referenced in these test methods are useful for control purposes during the manufacture and use of solventless varnishes.

    1. Scope

    1.1 These test methods cover solventless varnishes used primarily as electrical, mechanical, and environmental protection for electrical equipment.

    1.2 These test methods are used on solventless varnishes that are applied by dipping (at atmospheric pressure conditions or under vacuum or other certain pressure), spraying, or brushing for the purpose of impregnating or sealing electrical equipment. The following test methods are included:

    Property Tests (Uncured):

    Section

    Density

     7

    Flash Point

     8

    Gel Time

     9

    Monomer Content

    10

    Rheological Properties (Non-Newtonian)

    11

    Brookfield Viscosity

    12

    Performance Property Tests (cured):

     

    Bond Strength

    13

    Coating Thickness

    14

    Dielectric Strength

    15

    Dielectric Strength-Using Metal Panels

    16

    Permittivity and Dissipation Factor

    17

    Build

    18


    1.3 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.

    1.4 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. Specific hazard statements are given in 8.3, 15.5.1, and 15.5.2.

    Note 1This test method is related to IEC 60455. Since both methods contain multiple test procedures, many procedures are technically equivalent while others differ significantly.


    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

    D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

    D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation

    D168 Test Method for Coke Residue of Creosote

    D374 Test Methods for Thickness of Solid Electrical Insulation

    D923 Practices for Sampling Electrical Insulating Liquids

    D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products

    D1711 Terminology Relating to Electrical Insulation

    D2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) Viscometer

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

    D3056 Test Method for Gel Time of Solventless Varnishes

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

    D3312 Test Method for Percent Reactive Monomer in Solventless Varnishes

    D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus

    D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials

    D6054 Practice for Conditioning Electrical Insulating Materials for Testing

    E176 Terminology of Fire Standards

    IEC Standards

    IEC60455 Resin Based Reactive Compunds Used for Electrical Insulation


    ICS Code

    ICS Number Code 29.035.60 (Varnished fabrics)

    UNSPSC Code

    UNSPSC Code 31211707(Varnishes)


    Referencing This Standard

    DOI: 10.1520/D4733-13

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D4733-13, Standard Test Methods for Solventless Electrical Insulating Varnishes, ASTM International, West Conshohocken, PA, 2013, www.astm.org

    Back to Top