IEC 60216-6 : 2.0

ELECTRICAL INSULATING MATERIALS - THERMAL ENDURANCE PROPERTIES - PART 6: DETERMINATION OF THERMAL ENDURANCE INDICES (TI AND RTE) OF AN INSULATING MATERIAL USING THE FIXED TIME FRAME METHOD

International Electrotechnical Committee

More details

More info

FOREWORD
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
   3.1 Terms, abbreviations and definitions
   3.2 Symbols and abbreviated terms
4 FTFM protocol
   4.1 Principles and Objectives
5 TI determination
   5.1 Ageing procedures
   5.2 Ageing times and temperatures
   5.3 Test specimens
   5.4 Diagnostic tests
   5.5 Selection of end-points
   5.6 Establishment of initial property value
   5.7 Ageing conditions
   5.8 Procedure for ageing
6 Calculation procedures
   6.1 General principles
   6.2 Precision of calculations
   6.3 Derivation of temperatures equivalent to property
        values
   6.4 Regression analysis (temperature on time)
   6.5 Statistical tests
   6.6 Thermal endurance graph
7 Calculation and requirements for results
   7.1 Calculation of thermal endurance characteristics
   7.2 Reporting of results
8 Report
9 RTE determination
   9.1 Objectives of RTE determination
10 Additional symbols
11 Experimental procedures
   11.1 Selection of control material
   11.2 Selection of diagnostic test for extent of ageing
   11.3 Ageing procedures
12 Calculation procedures
   12.1 General principles
   12.2 Input data
   12.3 RTE
   12.4 Confidence limits
   12.5 Extrapolation
13 Results and report
   13.1 Results of statistical and numerical tests
   13.2 Result
   13.3 Report
Annex A (normative) Decision flow chart
Annex B (normative) Decision table
Annex C (informative) Statistical tables
Annex D (informative) Suggested ageing times and temperatures
Annex E (informative) Figures
Annex F (normative) Statistical significance of the difference
                    between two regression estimates
Annex G (informative) Computer programs for IEC 60216-6

Abstract

Specifies the experimental and calculation procedures for deriving the thermal endurance characteristics, temperature index (TI) and relative thermal endurance index (RTE) of a material using the 'fixed time frame method (FTFM)'.