GB/T 29313-2012Test method for thermal transmission properties of electrical insulation materials (English PDF)

GB/T 29313-2012 is the English-translated version of 电气绝缘材料热传导性能试验方法.

GB/T 29313-2012 specifies test methods for the thermal transmission properties, that is the thermal conductivity performance, of electrical insulating materials, and clause 1 states that it applies to the determination of thermal conductivity in paste, grease-like, elastic solid and rigid solid electrical insulating materials.

Its contents list names clause 3 terms, definitions and symbols, clause 4 a summary of the test method, clause 5 apparatus, clause 6 significance and application, clause 7 the specimen, clause 8 the test procedure, clause 9 calculation and clause 10 the report.

The introduction gives the reason for the standard: insulation in electrical and electronic equipment has to conduct heat as well as insulate, its thermal behaviour bears directly on the size, the temperature, the operating reliability and the service life of the equipment, and no domestic standard test method for the thermal conductivity of electrical insulating materials existed.

The same introduction states that the standard was compiled from research into the application of thermally conductive insulating materials and the state of thermal performance testing technique, with reference to ASTM D5470-06 (2011).

Among the terms defined in clause 3 is thermal conduction, the transfer of energy from the higher-temperature part of a body to the lower-temperature part caused by the temperature difference and relying only on the thermal motion of microscopic particles, without relative displacement of the parts, with a note that the definition is a rewording of 6.1.3 of GB/T 4132-1996.

Alongside GB/T 4132-1996 the normative references include GB/T 10294-2008 and GB/T 10295-2008 for the guarded hot plate and heat flow meter methods and several ASTM documents on thermal transmission testing and on thermophysical terminology.

The standard was proposed by the China Electrical Equipment Industrial Association and is administered by the National Technical Committee on Evaluation of Electrical Insulation Materials and Insulation Systems Standardization (SAC/TC301); the drafting organisations named on the page include a university, electrical apparatus research institutes, motor and generator manufacturers and an insulation systems company. It was issued on 2012-12-31 and has applied since 2013-06-01.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

GB/Z 21223.3-2023|GB/T 35679-2017|GB/T 29310-2012|GB/T 1303.13-2026|GB/T 46180-2025|GB/T 15022.10-2023

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