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 pressure), spraying, or brushing for the purpose of impregnating or sealing electrical equipment. The following test methods are included:

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.

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

IEC Standards

Keywords

bond strength; coating thickness; density; dielectric strength; dissipation factor; flash point; gel time; monomer content; permittivity; solventless varnishes; varnishes; viscosity ;

ICS Code

ICS Number Code 29.035.60 (Varnished fabr)

DOI: 10.1520/D4733-98

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