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BS EN IEC 60216-5:2022:2023 Edition

BS EN IEC 60216-5:2022:2023 Edition

$167.15

Electrical insulating materials. Thermal endurance properties – Determination of relative temperature index (RTI) of an insulating material

Published By Publication Date Number of Pages
BSI 2023 38
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IEC 60216-5:2022 specifies the experimental and calculation procedures to be used for deriving the relative temperature index of a material from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2. The calculation procedures are supplementary to those of IEC 60216-3. Guidance is also given for assessment of thermal ageing after a single fixed time and temperature, without extrapolation. This edition includes the following significant technical changes with respect to the previous edition:

  1. Annex C ā€œComputer programā€ has been completely reworked;
  2. in 3.1, the terms ā€œATEā€ and ā€œRTEā€ were replaced by ā€œATIā€ and ā€œRTIā€ to emphasize their reference to an electrical insulating material (EIM).

This standard is to be read in conjunction with IEC 60216-1:2013, IEC 60216-2:2005 and IEC 60216-3:2021.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
9 English
CONTENTS
11 FOREWORD
13 1 Scope
2 Normative references
14 3 Terms, definitions, symbols and units
3.1 Terms and definitions
15 3.2 Symbols and units
17 4 Objectives of RTI determination
5 Experimental procedures
5.1 Selection of reference EIM
5.2 Selection of diagnostic test for extent of ageing
5.3 Ageing procedures
18 6 Calculation procedures
6.1 Thermal endurance data ā€“ Calculation of intermediate parameters
Figure 1 ā€“ Thermal endurance graphs
Figure 2 ā€“ Unacceptable thermal endurance graphs
19 6.2 Calculation of RTI
Table 1 ā€“ Input parameters for the calculations concerning RTI
20 6.3 Statistical and numerical tests
6.3.1 Tests of IEC 60216-3
6.3.2 Precision of correlation time
6.3.3 Lower confidence interval of RTI
21 6.3.4 Extrapolation
7 Results and report
7.1 Results of statistical and numerical tests
7.2 Results
22 7.3 Report
8 Material testing by short-term thermal ageing
23 9 Insulation classification
24 Annex A (informative) Repeatability of correlation time
A.1 Overview
A.2 F-test for linearity
A.3 Standard error of the difference of two means
25 A.4 Studentā€™s t-test for difference of two means
26 A.5 Combination of data
27 Annex B (informative) Thermal class assignment
Table B.1 ā€“ Thermal class equivalents for insulating material
28 Table B.2 ā€“ Fā€“ function; p = 0,05
29 Table B.3 ā€“ tā€“function
30 Annex C (informative) Computer program
C.1 General
C.1.1 Overview
31 C.1.2 Convenience program execution
32 C.2 Structure of data files used by the program
Figure C.1 ā€“ Shortcut property dialog for program launch
33 C.3 Executing the calculation of RTI
C.4 Output files and graph
Figure C.2 ā€“ Thermal endurance graphs
34 Figure C.3 ā€“ Example thermal endurance graphs
35 Annex D (informative) Selection of the reference EIM
D.1 Overview
D.2 Designation of reference EIM
D.3 Reporting items for reference EIM
36 Bibliography

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