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BS EN IEC 60216-3:2021

BS EN IEC 60216-3:2021

$198.66

Electrical insulating materials. Thermal endurance properties – Instructions for calculating thermal endurance characteristics

Published By Publication Date Number of Pages
BSI 2021 64
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IEC 60216-3:2021 is available as IEC 60216-3:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60216-3:2021 specifies the calculation procedures used for deriving thermal endurance characteristics from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2, using fixed ageing temperatures and variable ageing times. The experimental data can be obtained using non-destructive, destructive or proof tests. Data obtained from non-destructive or proof tests can be incomplete, in that it is possible that measurement of times taken to reach the end-point will have been terminated at some point after the median time but before all specimens have reached end-point. The procedures are illustrated by worked examples, and suitable computer programs are recommended to facilitate the calculations. This edition includes the following significant technical changes with respect to the previous edition: – a new computer program has been included; – Annex E ” has been completely reworked.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
13 3.2 Symbols and abbreviated terms
15 4 Principles of calculations
4.1 General principles
4.2 Preliminary calculations
4.2.1 General
16 4.2.2 Non-destructive tests
4.2.3 Proof tests
4.2.4 Destructive tests
17 4.3 Variance calculations
4.4 Statistical tests
18 4.5 Results
5 Requirements and recommendations for valid calculations
5.1 Requirements for experimental data
5.1.1 General
5.1.2 Non-destructive tests
5.1.3 Proof tests
5.1.4 Destructive tests
19 5.2 Precision of calculations
6 Calculation procedures
6.1 Preliminary calculations
6.1.1 Temperatures and x-values
6.1.2 Non-destructive tests
6.1.3 Proof tests
6.1.4 Destructive tests
20 Figures
Figure 1 ā€“ Example of groups selection
23 6.1.5 Incomplete data
6.2 Main calculations
6.2.1 Calculation of group means and variances
24 6.2.2 General means and variances
25 6.2.3 Regression calculations
26 6.3 Statistical tests
6.3.1 Variance equality test
6.3.2 Linearity test (F-test)
27 6.3.3 Confidence limits of X and Y estimates
28 6.4 Thermal endurance graph
7 Calculation and requirements for results
7.1 Calculation of thermal endurance characteristics
29 7.2 Summary of statistical tests and reporting
7.3 Reporting of results
8 Test report
31 Annexes
Annex A (normative) Decision flow chart
Figure A.1 ā€“ Decision flow chart
32 Annex B (normative) Decision table
Tables
Table B.1 ā€“ Decisions and actions according to tests
33 Annex C (informative) Statistical tables
Table C.1 ā€“ Coefficients for censored data calculations
39 Table C.2 ā€“ Fractiles of the F-distribution, F(0,95, fn, fd)
40 Table C.3 ā€“ Fractiles of the F-distribution, F(0,995, fn, fd)
42 Table C.4 ā€“ Fractiles of the t-distribution, t0,95
Table C.5 ā€“ Fractiles of the Ļ‡2-distribution
43 Annex D (informative) Worked examples
Table D.1 ā€“ Worked example 1 ā€“ Censored data (proof tests: file CENEX3.DTA)
45 Table D.2 ā€“ Worked example 2 ā€“ Complete data (non-destructive tests: file TEST2.DTA)
47 Figure D.1 ā€“ Thermal endurance graph
48 Table D.3 ā€“ Worked example 3 ā€“ Destructive tests
49 Figure D.2 ā€“ Example 3: Property-time graph
Table D.4 ā€“ Worked example 3 ā€“ Selection of groups
51 Annex E (informative) Computer program
E.1 General
E.1.1 Overview
52 E.1.2 Convenience program execution
Figure E.1 ā€“ Shortcut property dialog for program launch
53 E.2 Structure of data files used by the program
E.2.1 Text file formats
54 Table E.1 ā€“ Non-destructive test data
Table E.2 ā€“ Destructive test data
55 E.2.2 Office Open XML formats
Table E.3 ā€“ Non-destructive test data
Table E.4 ā€“ Destructive test data
56 E.3 Data files for computer program
61 E.4 Output files and graph
Figure E.2 ā€“ Thermal endurance graph of example N3
62 Bibliography

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BS EN IEC 60216-3:2021
$198.66