🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN IEC 60068-3-3:2019

BS EN IEC 60068-3-3:2019

$198.66

Environmental testing – Supporting documentation and guidance. Seismic test methods for equipment

Published By Publication Date Number of Pages
BSI 2019 54
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This part of IEC 60068 applies primarily to electro-technical equipment but its application can be extended to other equipment and to components.

In addition, if some type of analysis is always performed when making a seismic qualification, for example for the choice of the representative sample to be tested or for the extension of the seismic qualification from the tested specimen to similar specimens, the verification of the performance of an equipment by analysis or by a combination of testing and analysis can be acceptable but is outside the scope of this document, which is restricted to verification based entirely upon data from dynamic testing.

This document deals solely with the seismic testing of a full-size equipment which can be tested on a vibration table. The seismic testing of an equipment is intended to demonstrate its ability to perform its required function during and/or after the time it is subjected to the stresses and displacements resulting from an earthquake.

The object of this document is to present a range of methods of testing which, when specified by the relevant specification, can be applied to demonstrate the performance of equipment for which seismic testing is required with the main aim of achieving qualification.

NOTE Qualification by so-called “fragility-testing” is not considered to be within the scope of this document which has been prepared to give generally applicable guidance on seismic testing and specifically on the use of IEC 60068-2 test methods.

The choice of the method of testing can be made according to the criteria described in this document. The methods themselves are closely based on published IEC test methods.

This document is intended for use by manufacturers to substantiate, or by users to evaluate and verify, the performance of an equipment.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
10 FOREWORD
12 INTRODUCTION
13 1 Scope
2 Normative references
14 3 Terms and definitions
19 4 General and qualification considerations
4.1 General seismic class and specific seismic class
4.2 Service conditions
20 4.3 Malfunction criteria
4.4 Qualification criteria
5 Testing procedures
5.1 General
5.2 Mounting
5.3 Measurements
5.3.1 Vibration measurements at the vibration table
21 5.3.2 Vibration measurements on the equipment
5.3.3 Functional monitoring of the equipment
5.4 Frequency range
6 Conditioning
7 Test wave selection
7.1 General
7.2 Multifrequency waves
22 7.3 Single-frequency waves
8 Test waves
8.1 General
8.1.1 Specification of test waves
8.1.2 Simulation with a safety margin of the effects of an earthquake
23 8.2 Multifrequency wave testing
8.2.1 General requirements
8.2.2 Time-history test
8.2.3 Other multifrequency tests
24 8.3 Single-frequency testing
8.3.1 General requirements
8.3.2 Sine-sweep test
8.3.3 Sine-beat test
25 8.3.4 Continuous sine test
8.4 Other test wave forms
9 Testing conditions
9.1 General
26 9.2 Vibration response investigation
9.3 Test methods
9.3.1 Test method for equipment without critical frequencies
27 9.3.2 Test method for equipment with critical frequencies
9.4 Selection of damping
Tables
Table 1 – Typical damping ratios (per cent of critical)
28 9.5 S1-earthquake and S2-earthquake testing
9.6 Specific application testing
9.7 Assembly testing
9.8 Component testing
29 10 Single and multi-axis testing
10.1 General
10.2 Single-axis testing
10.3 Biaxial testing
10.3.1 General requirements
10.3.2 Two horizontal axes
10.3.3 One horizontal axis and one vertical axis
30 10.4 Triaxial testing
10.4.1 General
10.4.2 Triaxial installation
31 10.4.3 Biaxial installation (one horizontal axis, one vertical axis)
11 Conditioning for the general seismic class
11.1 Selection of test type
11.2 Test method
Table 2 – Selection of test type
32 12 Calculated amplitude test method for the general seismic class
12.1 Application
12.2 Testing conditions
12.2.1 General
12.2.2 Performance level
12.2.3 Test wave selection
12.2.4 Damping ratio
12.2.5 Ground acceleration (ag)
Table 3 – Ground acceleration levels
33 Table 4 – Correspondence between peak ground acceleration and some seismic scales
34 12.2.6 Superelevation factor (K)
12.2.7 Direction factor (D)
Table 5 – Recommended superelevation factors (K)
Table 6 – Direction factors (D)
35 12.2.8 Floor acceleration (af)
13 Testing parameters for the general seismic class
13.1 Duration of test
13.2 Test acceleration (at)
13.2.1 General
36 13.2.2 Wave factor (α)
13.2.3 Geometric factor (G)
14 Required response spectrum for the general seismic class
Table 7 – Wave factor
37 15 Testing procedures for the general seismic class
15.1 Vibration response investigation (VRI)
Figures
Figure 1 – Shape of a required response spectrum in generalized form (log-log scale) (as recommended by IEC 60068-2-57)
38 15.2 Types of test
15.2.1 Sine-beat test
15.2.2 Sine-sweep test
15.2.3 Time-history test
15.2.4 Other test wave forms
16 Conditioning for the specific seismic class
39 17 Test wave selection for the specific seismic class
17.1 General
17.2 Multifrequency waves
17.3 Single-frequency waves
18 Test waves for the specific seismic class
18.1 General
18.2 Single-frequency testing
18.2.1 General
18.2.2 Sine-sweep test
18.2.3 Sine-beat test
40 18.2.4 Continuous sine test
18.3 Other test wave forms
19 Testing conditions for the specific seismic class
20 Single and multi-axis testing for the specific seismic class
Figure 2 – Typical envelope response spectrum
41 Figure 3 – Types of response spectrum envelopes
42 Figure 4 – Multifrequency response spectrum with superimposed sine beats
Figure 5 – Sequence of five sine beats with five cycles
43 Figure 6 – Typical time history
44 Figure 7 – Continuous sine
45 Figure 8 – Biaxial table along an inclined plane
46 Figure 9 – Wave amplification factors
47 Figure 10 – Vibration amplitudes for ground acceleration ag with crossover frequencies at 0,8 Hz and 1,6 Hz
48 Annex A (informative) Flow charts for test selection
A.1 Selection of test type
Figure A.1 – Selection of seismic class
49 A.2 General seismic class – Calculated amplitude test
Figure A.2 – Calculated amplitude test flowchart
50 A.3 Specific seismic class – Single axis testing
Figure A.3 – Single-axis testing flowchart
51 A.4 Specific seismic class – Multi-axis testing
Figure A.4 – Multi-axis testing flowchart
52 Bibliography

Related products

BS EN IEC 60068-3-3:2019
$198.66