SIST EN 61587-5:2014

Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 - Part 5: Seismic tests for chassis, subracks, and plug-in units

EN IEC 61587-5 specifies seismic test requirements for chassis, subracks, and plug-in units as defined in the IEC 60297 and IEC 60917 series. It applies in whole or in part, only to the mechanical structures of chassis, subracks, and plug-in units for electronic equipment, according to the IEC 60297 and IEC 60917 series, and does not apply to electronic components, equipment or systems within the mechanical structures. The object of this standard is to establish a level of physical integrity of chassis, subracks, and plug-in units according to IEC 60297 and IEC 60917 series that may provide a level of survivability that will preserve functionality during and after a seismic occurrence. It is intended to provide the user with a high level of confidence in the selection of an equipment practice to meet such needs. Since IEC 60297 and IEC 60917 series chassis, subracks, and plug-in units come in many sizes, weights and mechanical complexities, it is not possible to define a single minimum seismic test requirement for all weight categories. Therefore, overall mass categories are defined in this standard. However, the mass distribution inside a chassis and subrack is considered “application-specific” and herein defined as “intended use”. The single-axis or tri-axis acceleration for the seismic testing is selectable.

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Structures mécaniques pour équipement électronique - Essais pour la CEI 60917 et la CEI 60297 - Partie 5: Essais sismiques pour châssis, bacs et unités enfichables

L'IEC 61587-5:2013 spécifie les exigences d'essai sismique pour les châssis, les bacs et les unités enfichables tels que définis dans les séries CEI 60297 et CEI 60917. Elle s'applique, en tout ou en partie, seulement aux structures mécaniques des châssis, des bacs et des unités enfichables pour les équipements électroniques, conformément aux séries CEI 60297 et CEI 60917, et ne s'applique pas aux équipements ou systèmes électroniques, aux équipements ou aux systèmes qui se trouvent à l'intérieur de ces structures mécaniques. L'objet de la présente norme est d'établir un niveau d'intégrité physique des châssis, des bacs et des unités enfichables, conformément aux séries CEI 60297 et CEI 60917, qui peut fournir un niveau de pérennité qui protégera la fonctionnalité pendant et après une occurrence sismique. L'objectif est d'aider l'utilisateur à mieux choisir une structure appropriée pour satisfaire à ses besoins spécifiques. Les châssis, les bacs et les unités enfichables décrits dans les CEI 60297 et CEI 60917 ont diverses tailles, poids et complexités mécaniques; aussi, on ne peut pas définir une seule exigence d'essai sismique minimum pour toutes les catégories de poids. Des catégories de masse globales sont donc définies dans cette norme. La distribution de masse à l'intérieur d'un châssis et d'un bac, toutefois considérée comme 'spécifique à l'application', est ici définie dans son 'utilisation prévue'. Mots clés: châssis, bacs, unités enfichables, essai sismique

Mehanske konstrukcije za elektronsko opremo - Preskusi za IEC 60917 in IEC 60297 - 5. del: Potresni preskusi za šasije, okvire in vtične enote (IEC 61587-5:2013)

EN IEC 61587-5 določa potresne preskuse za šasije, okvire in vtične enote, kot jih določajo standardi iz serij IEC 60297 in IEC 60917. V celoti ali v delih velja le za mehanske strukture šasij, okvirov in vtičnih enot elektronske opreme v skladu s standardi iz serij IEC 60297 in IEC 60917 ter ne velja za elektronske komponente, opremo ali sisteme znotraj mehanskih struktur. Cilj tega standarda je določiti raven fizične celovitosti šasij, okvirov in vtičnih enot v skladu s standardi iz serij IEC 60297 in IEC 60917, ki lahko zagotovijo raven preživetja za ohranjanje delovanja med seizmičnimi pojavi in po njih. Uporabniku naj bi zagotovil visoko raven samozavesti pri izbiri pripomočkov, ki bodo ustrezali njegovim potrebam. Šasije, okviri in vtične enote iz serij IEC 60297 in IEC 60917 so na voljo v različnih velikostih, imajo različno težo in različno raven mehanične kompleksnosti, zato ni mogoče določiti enotne minimalne zahteve potresnega preskusa za vse kategorije teže. Zato ta standard določa splošne kategorije teže. Vendar se šteje, da je porazdelitev mase znotraj šasije in okvirov „namenjena določenemu načinu uporabe“, zato je določena kot „predvidena uporaba“. Enoosna ali triosna pospešitev za potresno preskušanje je izbirna.

General Information

• Status: Published
• Publication Date: 29-May-2014
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-May-2014
• Due Date: 18-Jul-2014
• Completion Date: 30-May-2014
• Ref Project: EN 61587-5:2014 - Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 - Part 5: Seismic tests for chassis, subracks and plug-in units

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61587-5:2014
01-julij-2014
0HKDQVNHNRQVWUXNFLMH]DHOHNWURQVNRRSUHPR3UHVNXVL]D,(&LQ,(&
GHO3RWUHVQLSUHVNXVL]DãDVLMHRNYLUHLQYWLþQHHQRWH,(&

Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 -
Part 5: Seismic tests for chassis, subracks, and plug-in units
/
Structures mécaniques pour équipement électronique - Essais pour la CEI 60917 et la
CEI 60297 - Partie 5: Essais sismiques pour châssis, bacs et unités enfichables
Ta slovenski standard je istoveten z: EN 61587-5:2014
ICS:
31.240 Mehanske konstrukcije za Mechanical structures for
elektronsko opremo electronic equipment
SIST EN 61587-5:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61587-5:2014

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SIST EN 61587-5:2014

EUROPEAN STANDARD
EN 61587-5

NORME EUROPÉENNE
March 2014
EUROPÄISCHE NORM

ICS 31.240


English version


Mechanical structures for electronic equipment -
Tests for IEC 60917 and IEC 60297 -
Part 5: Seismic tests for chassis, subracks and plug-in units
(IEC 61587-5:2013)


Structures mécaniques pour équipement Mechanische Bauweisen für elektronische
électronique - Essais pour la CEI 60917 et Einrichtungen - Prüfungen für IEC 60917
la CEI 60297 - und IEC 60297 -
Partie 5: Essais sismiques pour châssis, Teil 5: Seismische Prüfungen für
bacs et unités enfichables Einschübe, Baugruppenträger und
(CEI 61587-5:2013) steckbare Baugruppen
(IEC 61587-5:2013)



This European Standard was approved by CENELEC on 2014-01-14. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61587-5:2014 E

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SIST EN 61587-5:2014
EN 61587-5:2014 - 2 -
Foreword
The text of document 48D/549/FDIS, future edition 1 of IEC 61587-5, prepared by SC 48D, "Mechanical
structures for electronic equipment", of IEC/TC 48, "Electromechanical components and mechanical
structures for electronic equipment" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 61587-5:2014.
The following dates are fixed:
• latest date by which the document has (dop) 2014-10-14
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-01-14
• latest date by which the national
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61587-5:2013 was approved by CENELEC as a European
Standard without any modification.

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SIST EN 61587-5:2014
- 3 - EN 61587-5:2014
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60068-2-6 - Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)


IEC 60068-2-47 - Environmental testing - EN 60068-2-47 -
Part 2-47: Tests - Mounting of specimens for
vibration, impact and similar dynamic tests


IEC 60068-2-57 - Envionmental testing - EN 60068-2-57 -
Part 2-57: Test methods - Test Ff: Vibration -
Time-history & sine-beat method


IEC 60068-3-3 - Environmental testing - EN 60068-3-3 -
Part 3: Guidance - Seismic test methods for
equipments


IEC 60297 - Dimensions des structures mécaniques de la - -
série de 482,6 mm (19 in)


IEC 60297-3-101 - Mechanical structures for electronic EN 60297-3-101 -
equipment - Dimensions of mechanical
structures of the 482,6 mm (19 in) series -
Part 3-101: Subracks and associated plug-in
units


IEC 60512-2-1 - Connectors for electronic equipment - Tests EN 60512-2-1 -
and measurements -
Part 2-1: Electrical continuity and contact
resistance tests - Test 2a: Contact resistance
- Millivolt level method


IEC 60721-2-6 - Classification of environmental conditions - HD 478.2.6 S1 -
Part 2: Environmental conditions appearing in
nature - Earthquake vibration and shock


IEC 60917 (Series) - Modular order for the development of EN 60917 (Series) -
mechanical structures for electronic
equipment practices -



IEC 61587-1 - Mechanical structures for electronic EN 61587-1 -
equipment - Tests for IEC 60917 and IEC
60297 series -
Part 1: Environmental requirements, test set-
up and safety aspects for cabinets, racks,
subracks and chassis under indoor conditions


IEC 61587-2 - Mechanical structures for electronic - -
equipment - Tests for IEC 60917 and IEC
60297 -
Part 2: Seismic tests for cabinets and racks

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SIST EN 61587-5:2014
EN 61587-5:2014 - 4 -
Publication Year Title EN/HD Year


IEC 61587-3 - Mechanical structures for electronic EN 61587-3 -
equipment - Tests for IEC 60917 and IEC
60297 -
Part 3: Electromagnetic shielding performance
tests for cabinets and subracks

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SIST EN 61587-5:2014




IEC 61587-5

®


Edition 1.0 2013-12




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Mechanical structures for electronic equipment – Tests for IEC 60917

and IEC 60297 –

Part 5: Seismic tests for chassis, subracks and plug-in units




Structures mécaniques pour équipement électronique – Essais pour la

CEI 60917 et la CEI 60297 –


Partie 5: Essais sismiques pour châssis, bacs et unités enfichables













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX T


ICS 31.240 ISBN 978-2-8322-1300-1



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61587-5:2014
– 2 – 61587-5 © IEC:2013
CONTENTS

FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Equipment test categories . 8
5 Test waveform and acceleration condition . 9
5.1 General . 9
5.2 General conditions . 9
5.3 Single-axis acceleration . 9
5.4 Tri-axial acceleration . 10
5.5 Specimen monitoring . 12
5.6 Seismic simulation . 13
6 Test setup and parts to be monitored . 13
6.1 General . 13
6.2 Category A – Plug-in units . 13
6.2.1 General . 13
6.2.2 Plug-in unit simulated load . 13
6.2.3 Plug-in unit test setup onto the test fixture . 15
6.2.4 Plug-in unit test fixture setup to the vibration table . 17
6.2.5 Plug-in unit mechanical parts under test . 18
6.2.6 Vibration response monitoring . 18
6.2.7 Plug-in unit measurements . 18
6.2.8 Test sequence . 19
6.2.9 Plug-in unit electrical parts test (free and fixed connector) . 19
6.2.10 Acceptance criteria . 19
6.3 Category B – Chassis or subracks . 19
6.3.1 General . 19
6.3.2 Chassis or subrack simulated load . 20
6.3.3 Chassis or subrack test setup onto the vibration table . 21
6.3.4 Chassis or subrack mechanical parts under test . 21
6.3.5 Vibration response monitoring . 21
6.3.6 Chassis or subrack measurements . 22
6.3.7 Test sequence . 22
6.3.8 Acceptance criteria . 22
Annex A (informative) Example of test setup reporting . 23
A.1 Subrack test setup reporting . 23
A.2 Plug-in unit test setup reporting . 23
Bibliography . 24

Figure 1 – RRS for the test wave (single-axis acceleration)(damping ratio 2,0 %) . 10
Figure 2 – Time history of the test wave (single-axis acceleration) . 10
Figure 3 – RRS for the test wave (tri-axial acceleration)(damping ratio 3 %) . 11
Figure 4 – Time history of the test wave for each axis (tri-axial acceleration) . 12

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SIST EN 61587-5:2014
61587-5 © IEC:2013 – 3 –
Figure 5 – Plug-in unit intended use A load distribution (discrete) . 14
Figure 6 – Plug-in unit intended use B load distribution (compact) . 15
Figure 7 – Plug-in unit test setup – Subrack . 16
Figure 8 – Plug-in unit test setup – Chassis with integrated subrack . 17
Figure 9 – Block diagram of the plug-in unit test setup . 18
Figure 10 – Chassis or subrack test setup . 20
Figure 11 – Block diagram of the chassis or subrack test setup . 21

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SIST EN 61587-5:2014
– 4 – 61587-5 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
TESTS FOR IEC 60917 AND IEC 60297 –

Part 5: Seismic tests for chassis, subracks and plug-in units

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61587-5 has been prepared by subcommittee 48D: Mechanical
structures for electronic equipment, of IEC technical committee 48: Electromechanical
components and mechanical structures for electronic equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
48D/549/FDIS 48D/553/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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SIST EN 61587-5:2014
61587-5 © IEC:2013 – 5 –
A list of all parts of IEC 61587 series, under the general title Mechanical structures for
electronic equipment – Tests for IEC 60917 and IEC 60297, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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SIST EN 61587-5:2014
– 6 – 61587-5 © IEC:2013
INTRODUCTION
This standard is based on IEC 61587-2: Mechanical structures for electronic equipment –
Tests for IEC 60917 and IEC 60297 – Part 2: Seismic tests for cabinets and racks and ATIS-
0600329:2008:Network Equipment – Earthquake Resistance.
This standard sets forth test setups, performance requirements, and acceptance criteria for
determining the robustness of chassis, subracks, and associated plug-in units according to
the IEC 60297 and IEC 60917 series that may provide a level of survivability and preserve
functionality during and after a seismic occurrence (an earthquake). This standard does not
replace regional seismic system, installation standards, or specifications.
The intent of this standard is to provide a common methodology to perform and report seismic
test conformance of chassis, subracks, and plug-in units according to the IEC 60297 and
IEC 60917 series within a specified weight category. Mass distribution is based on the
intended use. The terms “intended use” or “simulation of service condition” or “worst-case
simulated configuration” are widely used in the telecom industry but also in the electronics
industry.
Seismic ground motion occurs simultaneously and randomly in all directions. Single-axis or
tri-axis tests may be selected to simulate the seismic environment for testing.

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SIST EN 61587-5:2014
61587-5 © IEC:2013 – 7 –
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
TESTS FOR IEC 60917 AND IEC 60297 –

Part 5: Seismic tests for chassis, subracks and plug-in units



1 Scope and object
This part of IEC 61587 specifies seismic test requirements for chassis, subracks, and plug-in
units as defined in the IEC 60297 and IEC 60917 series. It applies in whole or in part, only to
the mechanical structures of chassis, subracks, and plug-in units for electronic equipment,
according to the IEC 60297 and IEC 60917 series, and does not apply to electronic
components, equipment or systems within the mechanical structures.
NOTE Subracks may be an integral part of a chassis (often called in the industry a shelf or a crate).
The object of this standard is to establish a level of physical integrity of chassis, subracks,
and plug-in units according to IEC 60297 and IEC 60917 series that may provide a level of
survivability that will preserve functionality during and after a seismic occurrence. It is
intended to provide the user with a high level of confidence in the selection of an equipment
practice to meet such needs.
Since IEC 60297 and IEC 60917 series chassis, subracks, and plug-in units come in many
sizes, weights and mechanical complexities, it is not possible to define a single minimum
seismic test requirement for all weight categories. Therefore, overall mass categories are
defined in this standard. However, the mass distribution inside a chassis and subrack is
considered “application-specific” and herein defined as “intended use”.
The single-axis or tri-axis acceleration for the seismic testing is selectable.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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, Environmental testing – Part 2-6: Tests – Fc: Vibration (sinusoidal)
IEC 60068-2-47, Environmental testing – Part 2-47: Test – Mounting of specimens for
vibration, impact and similar dynamic tests
IEC 60068-2-57, Environmental testing – Part 2-57: Tests – Test Ff: Vibration – Time-history
and sine-beat method
IEC 60068-3-3, Environmental testing – Part 3-3: Guidance – Seismic test methods for
equipment
IEC 60297 (all parts), Mechanical structures for electronic equipment – Dimensions of
mechanical structures of the 482,6 mm (19 in) series
IEC 60297-3-101, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-101: Subracks and associated plug-in units

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SIST EN 61587-5:2014
– 8 – 61587-5 © IEC:2013
IEC 60512-2-1, Connectors for electronic equipment – Tests and measurements – Part 2-1:
Electrical continuity and contact resistance tests – Test 2a: Contact resistance – Millivolt level
method
IEC 60721-2-6, Classification of environmental conditions – Part 2: Environmental conditions
appearing in nature. Earthquake vibration and shock
IEC 60917 (all parts), Modular order for the development of mechanical structures for
electronic equipment practices
IEC 61587-1, Mechanical structures for electronic equipment – Tests for IEC 60917 and
IEC 60297 series – Part 1: Environmental requirements, test set-up and safety aspects for
cabinets, racks, subracks and chassis under indoor conditions
IEC 61587-2, Mechanical structures for electronic equipment – Tests for IEC 60917 and
IEC 60297 – Part 2: Seismic tests for cabinets and racks
IEC 61587-3, Mechanical structures for electronic equipment – Tests for IEC 60917 and
IEC 60297 – Part 3: Electromagnetic shielding performance tests for cabinets and subracks
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in IEC 60068-2-6,
IEC 60068-3-3, IEC 60068-2-47 and IEC 60068-2-57, apply as well as the following.
3.1
intended use
a method of use of the device under test that is the same as that recommended by the
manufacturer for actual service of the device, and according to which the recommended
configuration, bolt size, quantities, and torque values are used during testing
chassis
a mechanical structure according to IEC 60917-1. For the purpose of this standard a subrack
may also be an integral part of the chassis
3.2
simulated load boards
simulated mass attached to plug-in units according to IEC 60917-1
3.3
simulated equipment
the total mass of a subrack, chassis with integrated subrack, chassis with components or
plug-in unit fitted with simulated load
3.4
hot swap
managed plug-in units using electromechanical devices in the insertion and extraction process
during actual service
4 Equipment test categories
Equipment (chassis, subracks, and plug-in units) being subjected to seismic testing shall be
defined into one of the following mass categories. The test setup, the test method and
acceptance criteria for the selected category shall be applied throughout the testing.

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SIST EN 61587-5:2014
61587-5 © IEC:2013 – 9 –
Category A1 – Plug-in unit simulated equipment ≤ 1 kg
Category A2 – Plug-in unit simulated equipment > 1 kg and ≤ 2 kg
Category A3 – Plug-in unit simulated equipment > 2 kg and ≤ 5 kg
Category A4 – Plug-in unit simulated equipment > 5 kg and ≤ 10 kg
Category B1 – Chassis or subrack simulated equipment ≤ 23 kg
Category B2 – Chassis or subrack simulated equipment ≥ 23 kg and < 68 kg
Category B3 – Chassis or subrack simulated equipment ≥ 68 kg and < 181 kg
5 Test waveform and acceleration condition
5.1 General
The parameters such as time history, zero period acceleration, damping ratio, and severities
(frequency range, required response spectrum, acceleration per axis) have been derived from
methods stated in IEC 60068-3-3, IEC 60068-2-57 and environment zone 4 as defined in
IEC 60721-2-6.
5.2 General conditions
The tests shall be performed as follows:
a) The test waveform for the seismic test shall be a synthesized waveform.
b) The test shall be performed either with single-axis or tri-axis condition, as defined in this
standard and reported accordingly.
c) The duration of the strong part of the time history is defined from the time when the plot
first reaches 25 % of the maximum value to the time when it falls for the last time to the
25 % level.
d) The TRS (Test Response Spectrum) shall equal or exceed the RRS (Required Response
Spectrum) as shown in Figure 1 (for single-axis) and Figure 3 (for tri-axis). The damping
ratio of 3 % or 2 % is applied to evaluate the TRS and RRS, and is not applied to the
frequency range less than 0,5 Hz and more than 50 Hz. The value of g (standard
acceleration of gravity of the earth), is rounded up to the nearest whole number, that is
2
10 m/s .
e) The test waveform shall satisfy the RRS.
f) It is acceptable that the TRS is lower than the RRS typically found at the frequency range
st
lower than half or larger than twice the 1 natural frequency, but shall not exceed 20 % of
RRS.
g) If the TRS does not satisfy the RRS with the limitation of the displacement of the vibration
table, the TRS shall meet at the frequency range equal to or larger than 1 Hz.
5.3 Single-axis acceleration
a) Accelerate each axis of the vibration table independently.
b) The acceleration of the vibration table is measured during the test as described in 6.2.7 b)
and 6.3.6 b).
c) The duration of the strong part of the time history shall be equal to or more than 18 s.
2
d) The zero period acceleration of the input test wave shall be 16 m/s , the RRS shall be
according to Figure 1.
e) The time history of the test wave is per Figure 2.

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SIST EN 61587-5:2014
– 10 – 61587-5 © IEC:2013

100
10
0
0,1 1 10 100
Frequency  (Hz)
IEC  2878/13

Figure 1 – RRS for the test wave (single-axis acceleration)(damping ratio 2,0 %)

17,5
17.5
17.5
15,0
15.0
15.0
12,5
12.5
12.5
10,0
10.0
10.0
7,5
77.5.5
5,0
5.0
5.0
2,5
22.5.5
0,0
0.0
0.0
–2,5
- 2.5
- 2.5
–5,0
- 5.0
- 5.0
-–77.5,5
- 7.5
-–10.10,00
- 10.0
–12,5
-- 12.12.55
-–15.15,00
- 15.0
–17,5
-- 17.17.55
0,00 4,00 8,00 12,00 16,00 20,00 24,00 28,00 32,00
0.00 4.00 8.00 12.00 16.00 20.00 24.00 28.00 32.00
0.00 4.00 8.00 12.00 16.00 20.00 24.00 28.00 32.00
Time  (s)
IEC  2879/13
TTiimeme　　　　sesecc.

Figure 2 – Time history of the test wave (single-axis acceleration)
5.4 Tri-axial acceleration
a) Accelerate the table along the three axes simultaneously.
b) The acceleration of the individual axis differs from each other. The acceleration of the
vibration table is measured during the test as described in 6.2.7 b) and 6.3.6 b).
c) The duration of the strong part of the time history shall be equal to or more than 30 s.
d) The required maximum acceleration (zero period acceleration) for the input test waveform
2 2
shall be 12 m/s for horizontal stroke and 6 m/s for the up-and-down stroke, the RRS
shall be according to Figure 3.
e) Examples of the time history for each axis are show
...