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eLibrary > BS EN IEC 60216-6:2022 Electrical insulating materials. Thermal endurance properties - Determination of thermal endurance indices (TI and RTI) of an insulating material using the fixed time frame method >

BS EN IEC 60216-6:2022 Electrical insulating materials. Thermal endurance properties - Determination of thermal endurance indices (TI and RTI) of an insulating material using the fixed time frame method, 2023

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BS EN IEC 60216-6:2022 Electrical insulating materials. Thermal endurance properties - Determination of thermal endurance indices (TI and RTI) of an insulating material using the fixed time frame method, 2023

undefined [Go to Page]
Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
English [Go to Page]
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms [Go to Page]
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 FTFM protocol [Go to Page]
4.1 Principles of FTFM protocol
4.2 Objective of FTFM protocol
5 TI determination [Go to Page]
5.1 Ageing procedures
5.2 Ageing times and temperatures
5.3 Test specimens [Go to Page]
5.3.1 Preparation
5.3.2 Number of specimens
5.4 Diagnostic tests
5.5 Selection of end-points
5.6 Establishment of initial property value
5.7 Ageing conditions [Go to Page]
5.7.1 Ageing ovens
5.7.2 Environmental conditions
5.7.3 Conditions for property measurement
5.8 Procedure for ageing
6 Calculation procedures [Go to Page]
6.1 General principles [Go to Page]
6.1.1 Thermal endurance calculation
6.1.2 Property value – equivalent temperature transform(Calculation of hypothetical ageing temperature derived from the value of a property)
6.2 Precision of calculations
6.3 Derivation of temperatures equivalent to property values [Go to Page]
6.3.1 General
6.3.2 Preliminary calculations
6.3.3 Regression calculations (property on temperature)
6.3.4 Linearity test
6.3.5 Estimation of end-point temperatures equivalent to property values
6.4 Regression analysis (temperature on time) [Go to Page]
6.4.1 General
6.4.2 Group means and variances
6.4.3 General means and variances
6.4.4 Regression
6.5 Statistical tests [Go to Page]
6.5.1 Variance equality test
6.5.2 Linearity test (F-test)
6.5.3 Estimates of x and y and their confidence limits
6.6 Thermal endurance graph
7 Calculation and requirements for results [Go to Page]
7.1 Calculation of thermal endurance characteristics
7.2 Reporting of results [Go to Page]
7.2.1 Summary of statistical tests and reporting
7.2.2 Report format
8 Report
9 RTI determination
10 Additional symbols
11 Experimental procedures [Go to Page]
11.1 Selection of reference EIM
11.2 Selection of diagnostic test for extent of ageing
11.3 Ageing procedures
12 Calculation procedures [Go to Page]
12.1 General principles
12.2 Input data
12.3 RTI
Tables [Go to Page]
Table 1 – Intermediate data values
12.4 Confidence limits
12.5 Extrapolation
13 Results and report [Go to Page]
13.1 Results of statistical and numerical tests
13.2 Result
13.3 Report
Annexes [Go to Page]
Annex A (normative) Decision flow chart
Figures [Go to Page]
Figure A.1 – Decision flow chart
Annex B (normative) Decision table
Table B.1 – Decision table
Annex C (informative) Statistical tables
Table C.1 – χ 2-function
Table C.2 – t-function
Table C.3 – F-function, P = 0,05
Table C.4 – F-function, P = 0,005
Annex D (informative) Suggested ageing times and temperatures [Go to Page]
D.1 TI determination [Go to Page]
D.1.1 Correlation time (TI) = 20 000 h
D.1.2 Other correlation times for TI calculation (see 12.3)
Table D.1 – Ageing temperatures and times [Go to Page]
D.2 RTI determination
Annex E (informative) Figures
Figure E.1 – Property-temperature graph with regression line
Figure E.2 – Thermal endurance graph
Figure E.3 – Ageing times and temperatures in relation to thermal endurance graph
Figure E.4 – Ageing times and temperatures in relation to thermal endurance graph
Figure E.5 – Ageing times and temperatures in relation to thermal endurance graph
Annex F (normative) Statistical significance of the difference between two regression estimates
Annex G (informative) Computer program [Go to Page]
G.1 General [Go to Page]
G.1.1 Overview
G.1.2 Convenience program execution
G.2 Data files
Figure G.1 – Shortcut property dialog for program launch [Go to Page]
[Go to Page]
G.2.1 Content of file Control6.ftd
G.2.2 Report
G.2.3 Thermal endurance graph
Figure G.2 – Thermal endurance graph [Go to Page]

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BS EN IEC 60216-6:2022 Electrical insulating materials. Thermal endurance properties - Determination of thermal endurance indices (TI and RTI) of an insulating material using the fixed time frame method, 2023

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please select your company type below: