BS EN IEC 60068-3-1:2023 – TC

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Tracked Changes. Environmental testing – Supporting documentation and guidance. Cold and dry heat tests

Published By	Publication Date	Number of Pages
BSI	2023	43

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Description

IEC 60068-3-1:2023 is available as IEC 60068-3-1:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60068-3-1:2023 provides guidance regarding the performance of cold and dry heat tests. This third edition cancels and replaces the second edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) information relating to specimen temperatures has been revised; b) information relating to tests of multiple specimens has been revised; c) the effect of air density has been added; d) a recommendation for corrective actions regarding IR radiation has been added; e) the requirements for the mounting and supports of the specimen have been revised.

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PDF Pages	PDF Title
25	undefined
27	European foreword Endorsement notice
28	English CONTENTS
29	FOREWORD
31	1 Scope 2 Normative references 3 Terms and definitions
32	4 Selection of test procedures 4.1 General background 4.1.1 General 4.1.2 Ambient temperature 4.1.3 Specimen temperatures 4.1.4 Non heat-dissipating specimens 4.1.5 Heat-dissipating specimens
33	4.2 Mechanisms of heat transfer 4.2.1 Convection
34	Figure 1 – Experimental data on the effect of airflow on the surface temperature of a wire-wound resistor – Radial airflow
35	Figure 2 – Experimental data on the effect of airflow on the surface temperature of a wire-wound resistor – Axial airflow
36	4.2.2 Radiation Figure 3 – Temperature distribution on a cylinder with homogeneous heat generationin airflow of velocities (0,5, 1 and 2) m · s−1
37	4.2.3 Thermal conduction 4.2.4 Forced air circulation 4.3 Test chambers 4.3.1 General
38	4.3.2 Methods of achieving the required conditions in the test chamber 4.4 Measurements 4.4.1 Temperature 4.4.2 Air velocity Table 1 – Influence parameters when testing heat-dissipating specimens
39	Annex A (informative) Effect of airflow on chamber conditions andon surface temperatures of test specimens A.1 Calculation A.2 Specimen temperature A.3 Gradient between incoming and outgoing air
41	Bibliography

Additional information

Status	Definitive
Pages	43
Publication Date	2023-09-26
ISBN	978 0 539 28713 4
Standard Number	BS EN IEC 60068-3-1:2023 – TC
Title	Tracked Changes. Environmental testing – Supporting documentation and guidance. Cold and dry heat tests
Descriptors	Electrical equipment, Heat transfer, Heat, Emission, Test specimens, Thermal testing, Thermal conductivity, Environmental testing, Electronic equipment and components, Gas flow, Cold tests, Temperature measurement, Environment (working), Radiative heat transfer, Cold-weather tests, Dry-heat tests, Electrical components, Temperature rise, Test equipment, Dissipation factor, Velocity, Design, Air, Mathematical calculations, Temperature, Convection
Publisher	BSI
Committee	GEL/104
ICS Codes	19.040 - Environmental testing

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BS EN IEC 60068-3-1:2023 – TC

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