IEC 60068-2-75:2014
(Main)Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
IEC 60068-2-75:2014 provides three standardized and coordinated test methods for determining the ability of a specimen to withstand specified severities of impact. It is used, in particular, to demonstrate an acceptable level of robustness when assessing the safety of a product and is primarily intended for the testing of electrotechnical items. It consists of the application to the specimen of a prescribed number of impacts defined by their impact energy and applied in the prescribed directions. This part of IEC 60068 covers energy levels ranging from 0,14 J (joules) to 50 J (joules). This second edition cancels and replaces the first edition, published in 1997, and constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition:
- reconsideration of some values in Tables 1 and 2. Although some values are no longer recommended, they have been retained as alternatives for historical consistency purposes.
Essais d'environnement - Partie 2-75: Essais - Essai Eh: Essais au marteau
L'IEC 60068-2-75:2014 fournit trois méthodes d'essai normalisées et coordonnées pour déterminer l'aptitude d'un spécimen à supporter des sévérités spécifiées d'impact. Elle est utilisée en particulier pour démontrer un niveau acceptable de robustesse mécanique pour l'évaluation de la sécurité d'un produit; elle est destinée, en premier lieu, à l'essai de produits électrotechniques. Elle consiste à appliquer au spécimen un nombre prescrit d'impacts définis par leur énergie et appliqués dans des directions spécifiées. La présente partie de l'IEC 60068 couvre les niveaux d'énergie allant de 0,14 J (joules) à 50 J (joules). Cette deuxième édition annule et remplace la première édition, parue en 1997, et constitue une révision technique. Cette édition inclut la modification technique significative suivante par rapport à l'édition précédente:br /> - réexamen de certaines valeurs figurant dans les Tableaux 1 et 2. Bien qu'elles ne soient plus recommandées, certaines valeurs ont été conservées comme alternatives dans un but de cohérence avec la pratique antérieure.
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IEC 60068-2-75 ®
Edition 2.1 2025-10
INTERNATIONAL
STANDARD
CONSOLIDATED VERSION
Environmental testing -
Part 2-75: Tests - Test Eh: Hammer tests
ICS 19.040 ISBN 978-2-8327-0803-3
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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Provisions common to all hammer test methods . 7
4.1 Severities. 7
4.1.1 General . 7
4.1.2 Impact energy value . 7
4.1.3 Number of impacts. 7
4.2 Test apparatus . 8
4.2.1 Description . 8
4.2.2 Mounting . 9
4.3 Preconditioning . 9
4.4 Initial measurements . 9
4.5 Testing . 9
4.5.1 General . 9
4.5.2 Attitudes and impact locations . 9
4.5.3 Preparation of the specimen . 9
4.5.4 Operating mode and functional monitoring . 9
4.6 Recovery . 10
4.7 Final measurements. 10
4.8 Information to be given in the relevant specification . 10
5 Test Eha: Pendulum hammer . 10
5.1 Test apparatus . 10
5.1.1 General . 10
5.1.2 Test apparatus for severities not exceeding 1 J . 11
5.1.3 Test apparatus for severities of 2 J and above . 11
5.2 Height of fall . 11
5.3 Testing . 11
6 Test Ehb: Spring hammer . 12
6.1 Test apparatus . 12
6.2 Influence of earth's gravity . 13
6.3 Calibration . 13
7 Test Ehc: Vertical hammer . 13
7.1 Test apparatus . 13
7.2 Height of fall . 13
Annex A (normative) Shapes of striking elements . 14
Annex B (normative) Procedure for the calibration of spring hammers . 17
B.1 Principle of calibration . 17
B.2 Construction of the calibration device . 17
B.3 Method of calibration of the calibration device. 17
B.4 Use of the calibration device . 18
Annex C (informative) Guidance notes . 24
C.1 When is an impact test appropriate? . 24
C.2 Choice of test apparatus . 24
C.3 Choice of energy level . 24
C.4 Information for testing . 25
Annex D (informative) Example of pendulum hammer test apparatus . 26
Annex E (informative) Example of spring hammer test apparatus . 29
Bibliography . 31
Figure 1 – Example sketch of a striking element . 8
Figure 2 – Derivation of measuring point . 12
Figure 3 – Shape of release head for 2 J . 13
Figure A.1 – Example of a striking element for ≤ 1 J . 14
Figure A.2 – Example of a striking element for 2 J . 14
Figure A.3 – Example of a striking element for 5 J . 15
Figure A.4 – Example of a striking element for 10 J . 15
Figure A.5 – Example of a striking element for 20 J . 16
Figure A.6 – Example of a striking element for 50 J . 16
Figure B.1 – Calibration device . 19
Figure B.2 – Pendulum "c" . 20
Figure B.3 – Steel spring of pendulum "c" . 20
Figure B.4 – Details of calibration device . 21
Figure B.5 – Arrangement for the calibration of the calibration device . 22
Figure B.6 – Division of scale plate "f" . 23
Figure D.1 – Test apparatus . 26
Figure D.2 – Striking element of the pendulum hammer for energies ≤ 1 J . 27
Figure D.3 – Mounting fixture . 27
Figure D.4 – Adapter for flush-type switches . 28
Figure D.5 – Adapter for lamp holders . 28
Figure E.1 – Spring hammer test apparatus . 30
Table 1 – Coordinated characteristics of the striking elements . 8
Table 2 – Height of fall . 11
Table C.1 – Energy levels in joules . 24
Table E.1 – Kinetic energy of striking element . 29
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Environmental testing -
Part 2-75: Tests - Test Eh: Hammer tests
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IEC 60068-2-75 ®
Edition 2.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-75: Tests – Test Eh: Hammer tests
Essais d’environnement –
Partie 2-75: Essais – Test Eh: Essais au marteau
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IEC 60068-2-75 ®
Edition 2.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-75: Tests – Test Eh: Hammer tests
Essais d’environnement –
Partie 2-75: Essais – Test Eh: Essais au marteau
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 19.040 ISBN 978-2-8322-1842-6
– 2 – IEC 60068-2-75:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions. 8
4 Provisions common to all hammer test methods . 8
4.1 Severities . 8
4.1.1 General . 8
4.1.2 Impact energy value . 8
4.1.3 Number of impacts . 9
4.2 Test apparatus . 9
4.2.1 Description . 9
4.2.2 Mounting . 10
4.3 Preconditioning . 10
4.4 Initial measurements . 10
4.5 Testing . 10
4.5.1 General . 10
4.5.2 Attitudes and impact locations . 11
4.5.3 Preparation of the specimen . 11
4.5.4 Operating mode and functional monitoring . 11
4.6 Recovery . 11
4.7 Final measurements . 11
4.8 Information to be given in the relevant specification . 11
5 Test Eha: Pendulum hammer . 12
5.1 Test apparatus . 12
5.1.1 General . 12
5.1.2 Test apparatus for severities not exceeding 1 J . 12
5.1.3 Test apparatus for severities of 2 J and above. 12
5.2 Height of fall . 12
5.3 Testing . 13
6 Test Ehb: Spring hammer . 13
6.1 Test apparatus . 13
6.2 Influence of earth's gravity . 14
6.3 Calibration . 14
7 Test Ehc: Vertical hammer . 14
7.1 Test apparatus . 14
7.2 Height of fall . 14
Annex A (normative) Shapes of striking elements . 15
Annex B (normative) Procedure for the calibration of spring hammers. 18
B.1 Principle of calibration . 18
B.2 Construction of the calibration device . 18
B.3 Method of calibration of the calibration device . 18
B.4 Use of the calibration device. 19
Annex C (informative) Guidance notes. 25
C.1 When is an impact test appropriate? . 25
C.2 Choice of test apparatus. 25
C.3 Choice of energy level . 25
C.4 Information for testing . 26
Annex D (informative) Example of pendulum hammer test apparatus . 27
Annex E (informative) Example of spring hammer test apparatus . 30
Bibliography . 32
Figure 1 – Example sketch of a striking element . 10
Figure 2 – Derivation of measuring point . 13
Figure 3 – Shape of release head for 2 J . 14
Figure A.1 – Example of a striking element for ≤ 1 J . 15
Figure A.2 – Example of a striking element for 2 J . 15
Figure A.3 – Example of a striking element for 5 J . 16
Figure A.4 – Example of a striking element for 10 J . 16
Figure A.5 – Example of a striking element for 20 J . 17
Figure A.6 – Example of a striking element for 50 J . 17
Figure B.1 – Calibration device . 20
Figure B.2 – Pendulum "c" . 21
Figure B.3 – Steel spring of pendulum "c" . 21
Figure B.4 – Details of calibration device . 22
Figure B.5 – Arrangement for the calibration of the calibration device . 23
Figure B.6 – Division of scale plate "f" .
...
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