IEC 60544-5:2011 covers ageing assessment methods which can be applied to components based on polymeric materials (e.g. cable insulation and jackets, elastomeric seals, polymeric coatings, gaiters) which are used in environments where they are exposed to radiation. The object of this standard is aimed at providing methods for the assessment of ageing in service. The approaches discussed in the following clauses cover ageing assessment programmes based on condition monitoring (CM), the use of sample deposits in severe environments and sampling of real-time aged components. This second edition cancels and replaces the first edition, published in 2003, and constitutes an editorial revision to align it with standards recently developed by SC 45A as well as with other parts in the IEC 60544 series.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope and object 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions 4 Background 4.1 General 4.2 Diffusion limited oxidation (DLO) <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4.3 Dose rate effects (DRE) 4.4 Accelerated radiation ageing <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4.5 Accelerated thermal ageing 5 Approaches to ageing assessment 6 Identifying components of concern 6.1 General 6.2 Priorities for ageing management <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 6.3 Environmental monitoring 6.4 Localized severe environments 6.5 Worst case components 7 Condition monitoring techniques 7.1 General <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 7.2 Establishing correlation curves for CM methods 7.3 CM methods 7.4 Using CM for short-term troubleshooting <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Figures Figure 1 \u2013 Development of ageing data on changes in tensile elongation and a condition indicator (e.g. indenter modulus) \u2013 Schematic <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 7.5 Using CM for long-term degradation assessment Figure 2 \u2013 Correlation curve derived from data in Figure 1 \u2013 Schematic <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 8 Predictive modelling Figure 3 \u2013 Estimation of elongation from a correlation curve <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 9 Sample deposit 9.1 General 9.2 Requirements of a deposit 9.3 Pre-ageing samples for a deposit 9.4 Installation of an sample deposit <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 9.5 Testing of samples from the deposit 9.6 Determination of sampling intervals <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 9.7 Real time aged materials Figure 4 \u2013 Modification of sampling interval dependent on values of the CM indicator <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Annex A (informative) Example of a CM correlation curve Figure A.1 \u2013 Correlation curve for indenter modulus against tensile elongation for a CSPE cable jacket material [18] <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Annex B (informative) Use of a deposit <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Electrical insulating materials. Determination of the effects of ionizing radiation – Procedures for assessment of ageing in service<\/b><\/p>\n |