IEC 63522-17:2024
(Main)Electrical relays - Tests and measurements - Part 17: Shock, acceleration and vibration
Electrical relays - Tests and measurements - Part 17: Shock, acceleration and vibration
IEC 63522-17:2024 is used for testing electromechanical elementary relays (electromechanical relays, reed relays, reed contacts, reed switches and technology combination of these) and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method to simulate the mechanical stress on relays as it can occur in service, during handling or during transportation. This document comprises test procedures to simulate shock impacts, steady acceleration environments (such as moving vehicles, aircraft and projectiles) as well as vibration conditions.
Relais électriques - Essais et mesurages - Partie 17: Chocs, accélération et vibrations
Le IEC 63522-17:2024 traite des essais des relais électromécaniques élémentaires (relais électromécaniques, relais à lames souples, contacts à lames souples et leur combinaisons technologiques) et permet d'évaluer leur aptitude à fonctionner dans des conditions prévues de transport, de stockage, et tous les aspects d'utilisation opérationnelle.
Le présent document définit une méthode d'essai normalisée qui vise à simuler les contraintes mécaniques exercées sur les relais qui peuvent se produire en service, pendant la manutention ou pendant le transport. Le présent document comprend des procédures d'essai qui visent à simuler des chocs, des accélérations constantes (dans des véhicules en mouvement, des avions et des projectiles, par exemple) ainsi que des vibrations.
Les essais sont généralement prévus pour être effectués avec des dispositifs soumis à l'essai (DUT, Devices Under Test) sans emballage. Toutefois, si l'emballage est considéré comme une partie essentielle du DUT, les essais définis peuvent également être effectués avec l'emballage.
General Information
Standards Content (Sample)
IEC 63522-17 ®
Edition 1.0 2024-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –
Part 17: Shock, acceleration and vibration
Relais électriques – Essais et mesurages –
Partie 17: Chocs, accélération et vibrations
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IEC 63522-17 ®
Edition 1.0 2024-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –
Part 17: Shock, acceleration and vibration
Relais électriques – Essais et mesurages –
Partie 17: Chocs, accélération et vibrations
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.70 ISBN 978-2-8322-4246-9
– 2 – IEC 63522-17:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Test procedure . 6
4.1 General . 6
4.1.1 General purpose . 6
4.1.2 General conditions . 7
4.2 Shock . 7
4.2.1 Purpose . 7
4.2.2 Procedure . 7
4.2.3 Conditions . 8
4.3 Acceleration . 8
4.3.1 Purpose . 8
4.3.2 Procedure . 9
4.3.3 Conditions . 9
4.4 Vibration . 10
4.4.1 Purpose . 10
4.4.2 Procedure . 10
4.4.3 Conditions . 11
5 Evaluation . 11
5.1 General . 11
5.2 Test report . 12
Annex A (informative) Definition of test axes . 13
Bibliography . 14
Figure A.1 – Example of cartesian coordinate system to define the three mutually
perpendicular test axes on the DUT . 13
Table 1 – Evaluation of DUT properties after shock, acceleration and/or vibration test . 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 17: Shock, acceleration and vibration
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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shall not be held responsible for identifying any or all such patent rights.
IEC 63522-17 has been prepared by IEC technical committee 94: Electrical relays. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
94/1053/FDIS 94/1082/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
– 4 – IEC 63522-17:2024 © IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 63522 series, published under the general title Electrical relays –
Tests and measurements, can be found on the IEC website.
The French version of this standard has not been voted upon.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 17: Shock, acceleration and vibration
1 Scope
This document is used for testing electromechanical elementary relays (electromechanical
relays, reed relays, reed contacts, reed switches and technology combinations of these) and
for evaluating their ability to perform under expected conditions of transportation, storage and
all aspects of operational use.
This document defines a standard test method to simulate the mechanical stress on relays as
it can occur in service, during handling or during transportation. This document comprises test
procedures to simulate shock impacts, steady acceleration environments (such as moving
vehicles, aircraft and projectiles) as well as vibration conditions.
The tests are generally intended to be carried out with devices under test (DUTs) without
packaging. However, if the packaging is considered an essential part of the DUT, then the
defined tests can be carried out with packaging as well.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-7:1983, Basic environmental testing procedures – Part 2-7: Tests – Test Ga and
guidance: Acceleration, steady state
IEC 60068-2-7:1983/AMD1:1986
IEC 60068-2-27:2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock
IEC 60068-2-64:2008, Environmental testing – Part 2-64: Tests – Test Fh: Vibration, broadband
random and guidance
IEC 60068-2-64:2008/AMD1:2019
IEC 63522-0:—, Electrical relays – Tests and measurements – Part 0: Testing – General and
guidance
IEC 63522-1, Electrical relays – Tests and measurements – Part 1: Visual inspection and check
of dimensions
IEC 63522-5, Electrical relays – Tests and measurements – Part 5: Insulation resistance
___________
First edition under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
First edition under preparation. Stage at the time of publication: IEC CDV 63522-1:2023.
– 6 – IEC 63522-17:2024 © IEC 2024
IEC 63522-6, Electrical relays – Tests and measurements – Part 6: Contact-circuit resistance
(or voltage drop)
IEC 63522-7, Electrical relays – Tests and measurements – Part 7: Functional tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63522-0 apply.
nd IEC maintain terminology databases for use in standardization at the following
ISO a
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
4 Test procedure
4.1 General
4.1.1 General purpose
This document defines three different test procedures, for:
• shock,
• acceleration, and
• vibration.
Those procedures provide evidence about the structural integrity of DUTs and their
electromechanical design robustness. Based on the chosen test severity, the procedures may
also be used to deliberately reveal mechanical weaknesses of DUTs and allow grouping of parts
according to their stress resistance levels.
Shock tests may be used to characterize the robustness of the DUT with regard to transportation
impacts (e.g. drop events, handling) or whenever the application is subject to rather infrequent
shock impacts. Shocks create a wide-band excitation of the relays, not limited to specific
frequencies. By that, the shock test also helps to understand the structural integrity of the DUT,
if it is tested without packaging.
Acceleration tests may be used to characterise the robustness of the DUT with regard to
continuous acceleration stress during its service life. Typical applications are aircrafts, rotating
machinery as well as the automotive sector. The acceleration tests represent permanent steady
forces to the DUT interior, giving insight into its structural integrity.
Vibration tests may be used to characterise the robustness of the DUT with regard to expected
frequency ranges, by provoking particular resonance frequencies. This may be relevant for
automotive applications as well as any kind of transportation stress. Further, environmental
conditions like in off-shore installations may create significant vibrations in relays throughout
life as well as rotating machines or any moving equipment near any relay installation. The
vibration tests apply sine-wave forces to the DUT and its interior, creating a particular stress
on any joints and connection elements between the structural components.
4.1.2 General conditions
The tests stated in this document shall be carried out with appropriate test conditions and
severities, as well as suitable measurements conditions.
The DUT under test shall be in a new and clean condition, mounted as in service or as specified
by the manufacturer. If agreed, the tests may be carried out also on DUTs that are or have been
in service. The condition of the DUT is to be defined and stated in the report.
The test shall be performed under applicable reference conditions given in IEC 63522-0:— ,
4.4.
The shaker orientation may be chosen based on the DUT properties to be vertical or horizontal.
Due to the influence of gravity, the results can differ between vertical and horizontal excitation
of the same DUT.
The energization of the test coil shall be at the lower limit of the operative range unless
otherwise stated by the manufacturer or requested by the following procedures in 4.2, 4.3 and
4.4
Standard conditions of shock and vibration to which the DUT can be exposed to shall be
specified in the product standard. Alternatively, they shall be subject to an agreement between
the user and the manufacturer, when there are special requirements for other applications.
Examples for conditions in dedicated applications and relay categories are:
• Reed relays: IEC 61810-4:2020, Annex Q;
• High-capacity relays: IEC 61810-10:2019, Annex T;
• Railway applications: IEC 61373;
• Conditions for road vehicles: ISO 16750-3.
4.2 Shock
4.2.1 Purpose
The purpose of this test is to prove the capability of the DUT to function during and/or after non-
repetitive shocks encountered in service, during handling or during transportation.
4.2.2 Procedure
4.2.2.1 General
The test shall be conducted in accordance with IEC 60068-2-27, according to test Ea of the
basic environmental testing procedures.
Preferred severity levels are 3, 100, 500, 1 000 or 5 000 shocks in each direction, conducted
with the half-sine pulse shape. If not defined otherwise by the application requirements,
3 shocks in each direction shall be the minimum. However, other test repetitions and shock
profiles may be chosen in accordance with IEC 60068-2-27.
NOTE Previous editions of IEC 61810-7 included information on bump testing. This is now removed following the
withdrawal of IEC 60068-2-29. Equivalent stresses can also be covered by definition of shock tests. In addition,
specific transportation tests can be specified between manufacturer and customer. For example, in the America
region, the ISTA (International Safe Transit Association) specifies several integrity tests like 1A, comprising a
sequence of vibration and shock (by drop or other means).
___________
First edition under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
– 8 – IEC 63522-17:2024 © IEC 2024
4.2.2.2 Method 1: Capability to function during shocks
During this test, the DUT shall be subjected to one series of shocks while being in its operate
condition and one further series while being in its release/reset condition. Both series of tests
shall be performed in both directions of each of the three mutually perpendicular axes.
The DUTs shall be energized as defined in 4.2.3 i) unless otherwise specified by the
manufacturer.
During the test, the contact state shall be electrically monitored in accordance with
IEC 63522-0.
4.2.2.3 Method 2: Capability to function after shocks
During this test, the DUT shall be subjected to a series of shocks in both directions of each of
the three mutually perpendicular axes. The DUT shall not be energized, and the contacts shall
not be monitored.
4.2.3 Conditions
The conditions to be specified in addition to those of 4.1.2 are the following:
a) method 1 or 2 according to 4.2.2.2 or 4.2.2.3;
b) number of DUTs to be tested;
c) pulse shape, peak acceleration and duration shall be chosen from Table 1 of
IEC 60068-2-27:2008, with a half-sine wave of 11 ms as a preferred pulse shape.
IEC 60068-2-27:2008, Table 1 provides recommendations for degrees of test severity;
d) number of shocks, preferred values are 3, 100, 500, 1 000 or 5 000 shocks;
e) coordinate system for the test. The axis shall be aligned with the DUT body edges and
create a cartesian coordinate system, following the right-hand rule. An example is shown in
Annex A;
f) shaker orientation;
g) method of mounting of the DUT to the shaker, as agreed with the manufacturer. Change of
DUT orientation between tests of different shock axis shall avoid any impacts to test sample
conditions;
h) permitted duration of opening or closing and details of monitoring device, preferred duration
is 10 µs (alternative recommended values are 100 μs, 1 ms, and 10 ms). The contact action
shall be monitored in accordance with IEC 63522-0 (e.g., by a measuring and indicating
device as described in IEC 63522-0:— , A.2.4, for open DUTs to detect making contact and
for closed DUTs to detect micro-interruptions);
i) for method 1 according to 4.2.2.2:
• energization value, preferably the lower limit of the operative range (for monostable and
bistable DUTs),
• contact load, if required.
4.3 Acceleration
4.3.1 Purpose
The purpose of this test is to prove the capability of the DUT to function during and/or after
being subjected to forces produced by steady acceleration environments (such as moving
vehicles, aircraft, and projectiles).
___________
First edition under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
4.3.2 Procedure
4.3.2.1 General
This test shall be carried out in accordance with IEC 60068-2-7, test Ga of the basic
environmental testing procedures.
4.3.2.2 Method 1: Capability to function during acceleration
During this test, the DUT shall be in its operate condition for 50 % of the time of exposure.
During the remaining 50 % of the time of exposure, the DUT shall be in its release/reset
condition. Both exposures shall be performed in both directions of each of the three mutually
perpendicular axes.
The DUTs shall be energized as defined in 4.3.3 i) unless otherwise specified by the
manufacturer.
During the test, the contact state shall be electrically monitored in accordance with
IEC 63522-0.
4.3.2.3 Method 2: Capability to function after acceleration
During this test, the DUT shall be subjected to the required acceleration in both directions of
each of the three mutually perpendicular axes. The DUT shall not be energized, and the
contacts shall not be monitored.
4.3.3 Conditions
The conditions to be specified in addition to those of 4.1.2 are the following:
a) method 1 or 2;
b) number of DUTs to be tested;
c) acceleration level;
d) duration, if other than 10 s;
e) other characteristics given in IEC 60068-2-7:1983, Clause 8;
f) coordinate system for the test. The axis shall be aligned with the DUT body edges and
create a cartesian coordinate system, following the right-hand rule. An example is shown in
Annex A;
g) shaker orientation;
h) method of mounting of the DUT directly on the shaker plate as prescribed by the
manufacturer, an easy changeover for orientation should be targeted (to avoid DUT
manipulation during changeover);
i) for method 1 only:
• energization value, preferably the lower limit of the operative range (for monostable and
bistable DUTs),
• contact load, if required;
j) permitted duration of opening or closing and details of monitoring device, preferred duration
is 10 µs (alternative recommended values are 100 μs, 1 ms and 10 ms). The contact action
shall be monitored in accordance with IEC 63522-0 (e.g., by a measuring and indicating
, A.2.4, for open DUTs to detect making contact and
device as described in IEC 63522-0:—
for closed DUTs to detect micro-interruptions).
___________
First edition under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
– 10 – IEC 63522-17:2024 © IEC 2024
4.4 Vibration
4.4.1 Purpose
The purpose of this test is to prove the capability of the DUT to withstand conditions of vibration
encountered in service or during transportation.
4.4.2 Procedure
4.4.2.1 General aspects
During the test, the DUT setup shall be organised as per one of the following two versions:
a) Setup version 1: first half of the DUTs in operate condition, second half of the DUTs in
release/reset condition; or
b) Setup version 2: all DUTs shall be alternately in their operate condition and in their
release/reset condition, with the change in condition being synchronized with the completion
of each vibration sweep cycle.
During the test, care shall be taken to make sure that the stray field of the vibration generator
does not affect the DUT. Further, the coil supply should be rigidly fixed to avoid an interruption
of the coil energization during the test.
Each DUT shall be subjected to vibration in each of the three mutually perpendicular axes for
each of the selected procedures. If both procedures are required, then procedure 1 shall be
tested first, followed by procedure 2.
The DUTs shall be energized as defined in 4.4.3 g) unless otherwise specified by the
manufacturer.
During the test, the contact state shall be electrically monitored in accordance with
IEC 63522-0.
4.4.2.2 Procedure 1: Vibration sinusoidal
This test shall be carried out in accordance with IEC 60068-2-6, test Fa of the basic
environmental testing procedures.
The test shall be carried out with sweeping frequencies, and not at fixed frequencies. The
frequency shall sweep through the frequency range at a defined sweep rate, amplitude and test
duration. If required, the frequency range may be split, however the DUT load shall not be
reduced by the separation.
Before and after the sweep test, the vibration response investigation shall be carried out. The
comparison of the vibration response before and after the test gives insight into structural
changes of the DUT during and/or after the test.
IEC 60068-2-6:2007, 8.3.1 defines the sweep test to be applied, and IEC 60068-2-6:2007, 8.2
defines the vibration response investigation to be carried out.
4.4.2.3 Procedure 2: Vibration, broad-band random (digital control)
This test shall be carried out in accordance with IEC 60068-2-64, test Fh of the basic
environmental testing procedures.
If the DUTs under test are first subject to procedure 1 according to 4.4.2.2 and then
subsequently subject to procedure 2 according to 4.4.2.3, then test procedure 2 shall be carried
out without vibration response investigation prior to the test.
If procedure 2 according to 4.4.2.3 is defined as the only test for vibration, then it should include
the vibration response investigation before the test. The comparison of the vibration response
before and after the test gives insight into structural changes of the DUT during and/or after the
test.
IEC 60068-2-64:2008, 8.1 defines the test methods with and without vibration response
investigation prior to the test. IEC 60068-2-64:2008, 8.2 defines the vibration response
investigation.
4.4.3 Conditions
The conditions to be specified in addition to those of 4.1.2 are the following:
a) procedure 1 and/or 2 according to 4.4.2.2 or 4.4.2.3, preferably procedure 1;
b) setup version 1 or setup version 2 according to 4.4.2.1;
c) number of DUTs to be tested, preferably: 10 pieces for setup version 1, or 5 pieces for setup
version 2 under 4.4.2.1;
d) coordinate system for the test. The axis shall be aligned with the DUT body edges and
create a cartesian coordinate system, following the right-hand rule. An example is shown in
Annex A;
e) shaker orientation;
f) method of mounting of the DUT directly on the shaker plate as prescribed by the
manufacturer, the changeover of relay orientation shall avoid DUT manipulation during
changeover;
g) energization value, preferably the lower limit of the operative range (for monostable and
bistable DUTs);
h) contact load, if required;
i) number of sweeps for each axis, preferred values 3, 5, 10;
j) for procedure 1 according to 4.4.2.2: amplitude or acceleration level, frequency sweep range
and frequency change rate, see note at this end of this Subclause 4.4.3;
k) for procedure 2 according to 4.4.2.3: acceleration spectral density level and curve shape,
and all other characteristics given in IEC 60068-2-64:2008, Clause 11 and
IEC 60068-2-64:2008/AMD1:2019, Clause 11; frequency range and test duration;
l) permitted duration of opening or closing and details of monitoring device, preferred duration
is 10 µs (alternative recommended values are 100 μs, 1 ms and 10 ms). The contact action
shall be monitored in accordance with IEC 63522-0 (e.g., by a measuring and indicating
device as described in IEC 63522-0:— , A.2.4, for open DUTs to detect making contact and
for closed DUTs to detect micro-interruptions).
NOTE IEC 60068-2-6:2007, Annex B provides guidance on test severity for components, whereas
IEC 60068-2-6:2007, Annex C gives guidance for devices, based on application levels.
5 Evaluation
5.1 General
The evaluation shall be performed according to Table 1, depending on the tests carried out.
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First edition under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
– 12 – IEC 63522-17:2024 © IEC 2024
Table 1 – Evaluation of DUT properties after shock, acceleration and/or vibration test
Test Shock test Acceleration test Vibration test
according to 4.2 according to 4.3 according to 4.4
During the test For tests with method 1 only in accordance During the test, the contact action shall be
with 4.2.2.2 or 4.3.2.2: During the test, the monitored in accordance with IEC 63522-0.
contact action shall be monitored in No opening or closing of any closed or
accordance with IEC 63522-0. No opening opened contact circuit respectively shall
or closing of any closed or opened contact exceed the defined duration time for opening
circuit respectively shall exceed the defined or closing, respectively, both while the DUT is
duration time for opening or closing, in operate condition and in release condition.
respectively, both while the DUT is in
operate condition and in release condition.
Final inspection Visual inspection as specified in Visual inspection as specified in
after the test IEC 63522-1. IEC 63522-1.
Functional test as specified in IEC 63522-7. Functional test as specified in IEC 63522-7.
The contact-circuit resistance is measured Insulation resistance as specified in
in accordance with IEC 63522-6. The IEC 63522-5.
contact circuit resistance value(s) shall not
The contact-circuit resistance is measured in
exceed twice the specified initial value(s) or
accordance with IEC 63522-6. The contact
shall not exceed a value specified as fail
circuit resistance value(s) shall not exceed
criteria. The contact state of the DUT shall
twice the specified initial value(s), or shall not
be the same before and after the test.
exceed a value specified as fail criteria. The
Other final measurements, if required. contact state of the DUT shall be the same
before and after the test.
Comparison and evaluation of the vibration
responses before and after the vibration test.
Other final measurements, if required.
5.2 Test report
If this document is applied as a part of a test record of another standard, then the results shall
be reported as required in the other standard.
Otherwise, it is recommended to issue a dedicated test report according to this document.
The test report shall contain all the information necessary to reproduce the test. In particular,
the following shall be recorded:
The test report shall include at least the following:
• Number of DUTs under test, numbered individually;
• Initial condition and functional data of each of the DUTs;
• Test procedure applied according to 4.2.2, 4.3.2, or 4.4.2;
• Test conditions used according to 4.2.3, 4.3.3, or 4.4.3;
• Evaluation of each of the DUTs individually, as defined under 5.1;
• Test method/setup (only if several setups possible);
• If applicable, any other observations.
Annex A
(informative)
Definition of test axes
Figure A.1 indicates the three mutually perpendicular axes on an example DUT. The axes shall
be aligned with the DUT body edges and create a cartesian coordinate system, following the
right-hand rule.
Figure A.1 – Example of cartesian coordinate system to define
the three mutually perpendicular test axes on the DUT
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Bibliography
IEC 61373:2010, Railway applications – Rolling stock equipment – Shock and vibration tests
IEC 61810-1:2015, Electromechanical elementary relays – Part 1: General and safety
requirements
IEC 61810-1:2015/AMD1:2019
IEC 61810-4:2020, Electromechanical elementary relays – Part 4: General and safety
requirements for reed relays
IEC 61810-7:2006, Electromechanical elementary relays – Part 7: Test and measurement
procedures
IEC 61810-10:2019, Electromechanical elementary relays – Part 10: Additional functional
aspects and safety requirements for high-capacity relays
ISO 16750-3, Road vehicles – Environmental conditions and testing for electrical and electronic
equipment – Part 3: Mechanical loads
International Safe Transit Association, ISTA 1A:2014 – Non-Simulation Integrity Performance
Test Procedure 1A: Packaged-Products 150 lb (68 kg) or less
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SOMMAIRE
AVANT-PROPOS . 17
1 Domaine d'application . 19
2 Références normatives . 19
3 Termes et définitions . 20
4 Procédure d'essai . 20
4.1 Généralités . 20
4.1.1 Objet général . 20
4.1.2 Conditions générales . 21
4.2 Chocs . 21
4.2.1 Objet . 21
4.2.2 Procédure . 21
4.2.3 Conditions . 22
4.3 Accélération . 23
4.3.1 Objet . 23
4.3.2 Procédure . 23
4.3.3 Conditions . 23
4.4 Vibrations . 24
4.4.1 Objet . 24
4.4.2 Procédure . 24
4.4.3 Conditions . 25
5 Évaluation . 26
5.1 Généralités . 26
5.2 Rapport d'essai . 26
Annexe A (informative) Définition des axes d'essai . 27
Bibliographie . 28
Figure A.1 – Exemple de système de coordonnées cartésiennes pour définir les trois
axes d'essai trirectangulaires du DUT . 27
Tableau 1 – Évaluation des propriétés du DUT après l'essai de chocs, d'accélération
et/ou de vibrations . 26
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
RELAIS ÉLECTRIQUES –
ESSAIS ET MESURAGES –
Partie 17: Chocs, accélération et vibrations
AVANT-PROPOS
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