|
IEC 60068-3-3
Edition 2.0 2019-08
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Environmental testing –
Part 3-3: Supporting documentation and guidance – Seismic test methods for
equipments
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de
CH-1211 Geneva 20
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
.
IEC 60068-3-3
Edition 2.0 2019-08
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Environmental testing –
Part 3-3: Supporting documentation and guidance – Seismic test methods for
equipments
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040 ISBN 978-2-8322-7315-9
– 2 – IEC 60068-3-3:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Object Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General and qualification considerations . 14
4.1 General seismic class and specific seismic class . 14
4.2 Service conditions . 15
4.3 Malfunction criteria . 15
4.4 Qualification criteria . 15
5 Testing procedures . 15
5.1 General . 15
5.2 Mounting . 15
5.3 Measurements . 15
5.3.1 Vibration measurements at the vibration table . 15
5.3.2 Vibration measurements on the equipment . 16
5.3.3 Functional monitoring of the equipment . 16
5.4 Frequency range . 16
6 Conditioning . 16
Standard amplitude conventional test method .
7 Test wave selection . 17
7.1 General . 17
7.2 Multifrequency waves. 18
7.3 Single-frequency waves . 18
8 Test waves . 18
8.1 General . 18
8.1.1 Specification of test waves . 18
8.1.2 Simulation with a safety margin of the effects of an earthquake . 19
8.2 Multifrequency wave testing . 19
8.2.1 General requirements . 19
8.2.2 Time-history test . 19
8.2.3 Other multifrequency tests . 20
8.3 Single-frequency testing . 20
8.3.1 General requirements . 20
8.3.2 Sine-sweep test . 21
8.3.3 Sine-beat test . 21
8.3.4 Continuous sine test . 21
8.4 Other test wave forms . 22
9 Testing conditions . 22
9.1 General . 22
9.2 Vibration response investigation . 23
9.3 Test methods . 23
9.3.1 Test method for equipment without critical frequencies . 23
9.3.2 Test method for equipment with critical frequencies . 24
9.4 Selection of damping . 24
9.5 S1-earthquake and S2-earthquake testing . 25
9.6 Specific application testing . 25
9.7 Assembly testing . 25
9.8 Component testing . 25
10 Single and multi-axis testing . 26
10.1 General . 26
10.2 Single-axis testing . 26
10.3 Biaxial testing . 26
10.3.1 General requirements . 26
10.3.2 Two horizontal axes . 26
10.3.3 One horizontal axis and one vertical axis . 26
10.4 Triaxial testing . 27
10.4.1 General . 27
10.4.2 Triaxial installation . 27
10.4.3 Biaxial installation (one horizontal axis, one vertical axis) . 28
11 Conditioning for the general seismic class . 28
11.1 Selection of test type . 28
11.2 Test method . 28
12 Calculated amplitude test method for the general seismic class . 29
12.1 Application . 29
12.2 Testing conditions . 29
12.2.1 General . 29
12.2.2 Performance level . 29
12.2.3 Test wave selection . 29
12.2.4 Damping ratio . 29
12.2.5 Ground acceleration (a ) . 29
g
12.2.6 Superelevation factor (K) . 31
12.2.7 Direction factor (D) . 32
12.2.8 Floor acceleration (a ) . 32
f
13 Testing parameters for the general seismic class . 32
13.1 Duration of test . 32
13.2 Test acceleration (a ) . 33
t
13.2.1 General . 33
13.2.2 Wave factor (α) . 33
13.2.3 Geometric factor (G) . 34
14 Required response spectrum for the general seismic class . 34
15 Testing procedures for the general seismic class . 35
15.1 Vibration response investigation (VRI) . 35
15.2 Types of test . 36
15.2.1 Sine-beat test . 36
15.2.2 Sine-sweep test . 37
15.2.3 Time-history test . 37
15.2.4 Other test wave forms . 37
16 Conditioning for the specific seismic class . 37
17 Test wave selection for the specific seismic class . 37
17.1 General . 37
17.2 Multifrequency waves. 37
17.3 Single-frequency waves . 38
– 4 – IEC 60068-3-3:2019 RLV © IEC 2019
18 Test
...