1、 IEC/TR 62730 Edition 1.0 2012-03 TECHNICAL REPORT HV polymeric insulators for indoor and outdoor use tracking and erosion testing by wheel test and 5 000h test IEC/TR 62730:2012(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise
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9、utdoor use tracking and erosion testing by wheel test and 5 000h test INTERNATIONAL ELECTROTECHNICAL COMMISSION R ICS 29.080.10 PRICE CODE ISBN 978-2-88912-032-1 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an author
10、ized distributor. 2 TR 62730 IEC:2012(E) CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope and object 6 2 Normative references . 6 3 Terms and definitions . 6 4 Background to the tracking and erosion tests . 8 4.1 Difference between the tracking and erosion and accelerated ageing tests on polymeric ins
11、ulators 8 4.2 The wheel test . 8 4.3 The 5 000h multiple stress test 9 5 Classification of tests . 10 6 General requirements for insulator test specimens . 10 7 The tests 10 7.1 Wheel test . 10 7.1.1 Test specimens . 10 7.1.2 Procedure 10 7.1.3 Test conditions 12 7.1.4 Acceptance criteria 12 7.2 5 0
12、00 hour test (test at multiple stresses) 12 7.2.1 Test specimen . 12 7.2.2 Procedure 12 7.2.3 Test conditions 13 7.2.4 Voltage 15 7.2.5 Solar simulation . 15 7.2.6 Artificial rain 15 7.2.7 Dry heat 16 7.2.8 Humidity 16 7.2.9 Pollution 16 7.2.10 Salt fog calibration . 16 7.2.11 Acceptance criteria 18
13、 Bibliography 19 Figure 1 Test arrangement of the tracking wheel test . 11 Figure 2 Typical layout of the test specimens in the chamber and main dimensions of the chamber 13 Figure 3 Multiple stress cycle . 14 Figure 4 Typical layout of the rain and salt fog spray systems and the xenon lamp 14 Figur
14、e 5 Spectrum of xenon arc lamp and solar spectrum 15 Figure 6 Reference porcelain insulator . 17 TR 62730 IEC:2012(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HV POLYMERIC INSULATORS FOR INDOOR AND OUTDOOR USE TRACKING AND EROSION TESTING BY WHEEL TEST AND 5 000H TEST FOREWORD 1) The Internatio
15、nal Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic
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24、e upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elem
25、ents of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technica
26、l report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC 62730, which is a technical report, has been prepared by IEC technical committee 36: Insulators. The text of this technical report is based
27、on the following documents: Enquiry draft Report on voting 36/305/DTR 36/316A/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, P
28、art 2. 4 TR 62730 IEC:2012(E) The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed,
29、 withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. TR 62730 IEC:2012(E) 5 INTRODUCTION IEC 62217 1 1included three different tracking and erosion tests. One, the 1 000 hour salt- fog test, was included in the main text as a d
30、efault test and two others, the 5 000 hour test and the tracking wheel test, were given in annexes as alternative tests. Following a decision by TC 36 it was decided that it was desirable to have a single standardised test in IEC 62217; hence a study of the usage and effectiveness of all three tests
31、 was undertaken by Working Group 12 of TC 36. The results of this study indicated that, while the 5 000h and the tracking wheel tests each had their advantages, only the 1 000 hour salt fog test was adapted to all insulator types and was more economical to perform. It was decided by TC 36 to adopt t
32、he 1 000 hour salt-fog test as the only standardised test. It was also decided to draft this Technical Report to reproduce the 5 000 hour and the tracking wheel test procedures in order to keep the information on the test methods and parameters available for those wishing to use those tests for rese
33、arch or other purposes. The tracking and erosion tests given in this technical report are considered as screening tests intended to reject materials or designs which are inadequate. These tests are not intended to predict long-term performance for insulator designs under cumulative service stresses.
34、 Composite insulators are used in both a.c. and d.c. applications. In spite of this fact a specific tracking and erosion test procedure for d.c. applications as a design test has not yet been defined and accepted. IEC Guide 111 has been followed during preparation of this technical report wherever p
35、ossible. _ 1Numbers in square brackets refer to the Bibliography. 6 TR 62730 IEC:2012(E) HV POLYMERIC INSULATORS FOR INDOOR AND OUTDOOR USE TRACKING AND EROSION TESTING BY WHEEL TEST AND 5 000H TEST 1 Scope and object This technical report is applicable to polymeric insulators whose insulating body
36、consists of one or various organic materials. Polymeric insulators covered by this technical report include both solid core and hollow insulators. They are intended for use on overhead lines and in indoor and outdoor equipment with a rated voltage greater than 1 000 V. The object of this technical r
37、eport is: to define the common terms used; to give the background behind the development and use of the 5 000 h multiple stress test and the tracking wheel test; to describe the test methods for the 5 000 h multiple stress test and the tracking wheel tests on polymeric insulators; to describe possib
38、le acceptance or failure criteria, if applicable; These tests, criteria and recommendations are intended to give a common basis for the 5 000h multiple stress test and the tracking wheel test when they are used for research or required as a supplementary design test. These tests are not mandatory an
39、d their use is subject to prior agreement between the interested parties. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refe
40、rences, the latest edition of the referenced document (including any amendments) applies. IEC 60050-47:2007, International Electrotechnical Vocabulary Part 471: Insulators IEC 60060-1, High-voltage test techniques Part 1: General definitions and test requirements. IEC 60507, Artificial pollution tes
41、ts on high-voltage insulators to be used on a.c systems IEC 60815-2, Selection and dimensioning of high-voltage insulators intended for use in polluted conditions Part 2: Ceramic and glass insulators for a.c. systems 3 Terms and definitions For the purposes of this document the terms and definitions
42、 given in IEC 60050 (471) and the following apply: 3.1 polymeric insulator insulator whose insulating body consists of at least one organic based material. Coupling devices may be attached to the ends of the insulating body Note 1 to entry: Polymeric insulators are also known as non-ceramic insulato
43、rs. SOURCE: IEC 60050-471:2007, 471-01-13, modified TR 62730 IEC:2012(E) 7 3.2 core central insulating part of an insulator which provides the mechanical characteristics Note 1 to entry: The housing and sheds are not part of the core. SOURCE: IEC 60050-471:2007, 471-01-03 3.3 insulator trunk central
44、 insulating part of an insulator from which the sheds project. Note 1 to entry: Also known as shank on smaller insulators. SOURCE: IEC 60050-471:2007, 471-01-11 3.4 housing external insulating part of a composite insulator providing the necessary creepage distance and protects the core from the envi
45、ronment Note 1 to entry: An intermediate sheath made of insulating material may be part of the housing. SOURCE: IEC 60050-471:2007, 471-01-09 3.5 shed insulating part, projecting from the insulator trunk, intended to increase the creepage distance. Note 1 to entry: The shed can be with or without ri
46、bs. SOURCE: IEC 60050-471:2007, 471-01-15 3.6 creepage distance shortest distance or the sum of the shortest distances along the surface on an insulator between two conductive parts which normally have the operating voltage between them Note 1 to entry: The surface of cement or of any other non-insu
47、lating jointing material is not considered as forming part of the creepage distance. Note 2 to entry: If a high resistance coating is applied to parts of the insulating part of an insulator, such parts are considered to be effective insulating surfaces and the distance over them is included in the c
48、reepage distance. SOURCE: IEC 60050-471:2007, 471-01-04 3.7 interfaces surface between the different materials. Various interfaces occur in most composite insulators, e.g.: between housing and fixing devices; between various parts of the housing; e.g. between sheds, or between sheath and sheds; betw
49、een core and housing; 3.8 tracking process which forms irreversible degradation by formation of conductive paths (tracks) starting and developing on the surface of an insulating material. These paths are conductive even under dry conditions 8 TR 62730 IEC:2012(E) 3.9 erosion irreversible and non-conducting degradation of the surface of the insulator that occurs by loss of material. This can be uniform, localized or tree-shaped. Note 1 to entry: Light surface trace
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