ASTM D4733-17

Standard Test Methods for Solventless Electrical Insulating Varnishes

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STANDARD published on 1.11.2017

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The information about the standard:

Designation standards: ASTM D4733-17
Publication date standards: 1.11.2017
SKU: NS-801038
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM

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The category - similar standards:

Varnished fabrics

Annotation of standard text ASTM D4733-17 :

Keywords:

bond strength, coating thickness, density, dielectric strength, dissipation factor, flash point, gel time, monomer content, permittivity, solventless varnishes, varnishes, viscosity ,, ICS Number Code 29.035.60 (Varnished fabrics)

Additional information

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

Flash Point

Gel Time

Monomer Content

Rheological Properties (Non-Newtonian)

Rotational Viscosity

Performance Property Tests (cured):

Bond Strength

Coating Thickness

Dielectric Strength

Dielectric Strength-Using Metal Panels

Permittivity and Dissipation Factor

Build

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: This test method is related to IEC 60455. Since both methods contain multiple test procedures, many procedures are technically equivalent while others differ significantly.

1.5 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.

2. Referenced Documents

D923-15(2023)	Standard Practices for Sampling Electrical Insulating Liquids
D1475-13(2020)	Standard Test Method for Density of Liquid Coatings, Inks, and Related Products
D1711-24	Standard Terminology Relating to Electrical Insulation
D2196-20	Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
D2519-19a	Standard Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test (Includes all amendments and changes 11/14/2019).
D3056-23	Standard Test Method for Gel Time of Solventless Varnishes
D3278-21	Standard Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
D3312-18	Standard Test Method for Percent Reactive Monomer in Solventless Varnishes
D3487-16e1	Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus (Includes all amendments and changes 1/1/2018).
D3636-19	Standard Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
D6054-97	Standard Practice for Conditioning Electrical Insulating Materials for Testing
E176-24	Standard Terminology of Fire Standards
IEC 60455	Resin Based Reactive Compunds Used for Electrical Insulation
D374-99	Standard Test Methods for Thickness of Solid Electrical Insulation
D93-20	Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D115-17	Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
D149-20	Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D150-22	Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D168-94(2000)	Standard Test Method for Coke Residue of Creosote (Withdrawn 2006)

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