1、 TECHNICAL SPECIFICATION IEC TS 61244-3 Second edition2005-11 Long-term radiation ageing in polymers Part 3:Procedures for in-service monitoring of low-voltage cable materials Reference number IEC/TS 61244-3:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUP
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8、22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL SPECIFICATION IECTS 61244-3 Second edition2005-11 Long-term radiation ageing in polymers Part 3:Procedures for in-service monitoring of low-vol
9、tage cable materials PRICE CODE IEC 2005 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical C
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11、CHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 61244-3 IEC:2005(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Abbreviations.7 4 Requirements of a monitoring technique.8 5 Techniques available.8 5.1 General.8 5.2 Local tests without
12、 sampling.9 5.3 Local tests with micro-sampling.11 6 Summary.14 Bibliography.28 Figure 1 Schematic diagram showing the operating principles of the sonic velocity meter 1.16 Figure 2 Sonic velocity test results 3.17 Figure 3 Variation in IR absorbance with wavelength for PVC material and the use of f
13、irst derivative to eliminate baseline shifts 1.18 Figure 4 Correlation of first derivative of IR absorbance at 1 640 nm to 1 650 nm and elongation at break for thermal ageing of PVC at 110 C 1.19 Figure 5 Schematic diagram and photographs of prototype torque tester.20 Figure 6 Elongation at break ve
14、rsus torque value for flame-retardant PVC cables thermally aged at 158 C 5.21 Figure 7 Elongation at break versus torque value for PVC cables exposed to sequential radiation ageing to 0,5 MGy and thermal ageing at 120 C 5.21 Figure 8 Elongation at break versus torque value for PVC cables thermally a
15、ged at 120 C 5.22 Figure 9 Correlation of tensile elongation with modulus measurements made using the modulus profiling apparatus for a CSPE jacket aged at the five indicated temperatures 6.22 Figure 10 Correlation of tensile elongation with modulus measurements made using the modulus profiling appa
16、ratus for a CP jacket aged at the three indicated temperatures(from Reference 8).23 Figure 11 Correlation of tensile elongation with modulus measurements made using the modulus profiling apparatus for a CSPE jacket aged at the four indicated combined environments 9.23 Figure 12 Correlation of tensile elongation with NMR relaxation time measurements for a CP jacket aged at the three indicated temperatures(from Reference 8).24 Figure 13 Correlation of tensile elongation with NMR relaxation time me