1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationInsulating liquids Test method for detection of potentially corrosive sulphur in used and unused insulating oilBS EN 62535:2009Incorporating corrigendum February 2011National for
2、ewordThis British Standard is the UK implementation of EN 62535:2009. It is identical to IEC 62535:2008.The UK participation in its preparation was entrusted to Technical CommitteeGEL/10, Fluids for electrotechnical applications.A list of organizations represented on this committee can be obtained o
3、nrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 74643 7 ICS 29.040.10BRITISH STANDARDBS EN 62535:2009Compliance with a British Standard cannot confer immunity
4、from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2009.Amendments/ corrigenda issued since publicationDate Text affected28 February 2011 Correction to BS headers throughout documentEUROPEAN STANDARD EN 62535 NORM
5、E EUROPENNE EUROPISCHE NORM January 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation
6、 in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62535:2009 E ICS 29.040.10 English version Insulating liquids - Test method for detection of potentially corrosive sulphur in used and unused insulating oil (IEC 62535:2008) Liquides isolants - Mthode dessai pour la dt
7、ection du soufre potentiellement corrosif dans les huiles usages et neuves (CEI 62535:2008) Isolierflssigkeiten - Prfverfahren fr den Nachweis von potenziell korrosivem Schwefel in gebrauchtem und ungebrauchtem Isolierl(IEC 62535:2008) This European Standard was approved by CENELEC on 2008-12-01. CE
8、NELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on
9、 application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Sec
10、retariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, t
11、he Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 62535:2009 2 Foreword The text of document 10/746/FDIS, future edition 1 of IEC 62535, prepared by IEC TC 10, Fluids for electrotechnical applications, was submitted to the IE
12、C-CENELEC parallel vote and was approved by CENELEC as EN 62535 on 2008-12-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-09-01 latest date by which the national sta
13、ndards conflicting with the EN have to be withdrawn (dow) 2011-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62535:2008 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the
14、following note has to be added for the standard indicated: IEC 60567 NOTE Harmonized as EN 60567:2005 (not modified). _ BS EN 62535:2009 3 EN 62535:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced doc
15、uments are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modificati
16、ons, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year - - Copper and copper alloys - Copper rod, bar and wire for general electrical purposes EN 13601 - 1)IEC 60475 - 1)Method of sampling liquid dielectrics - - IEC 60554-3-1 - 1)Specification for cellulosic papers fo
17、r electrical purposes - Part 3: Specifications for individual materials - Sheet 1: General purpose electrical paper - - ASTM D1275 - 1)Methods A and B: Standard test method for corrosive sulfur in electrical insulating oils - - ASTM D130 - 1)Standard test method for corrosiveness to copper from petr
18、oleum products by copper strip test - - DIN 51353 - 1)Testing of insulating oils; detection of corrosive sulfur; silver strip test - - 1)Undated reference. BS EN 62535:2009 2 62535 IEC:2008 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Sampling 7
19、 5 Procedure 7 5.1 Principle7 5.2 Apparatus and materials7 5.3 Method8 6 Inspection and interpretation 8 6.1 General .8 6.2 Copper 9 6.3 Paper 9 6.4 Result .9 7 Repeatability and reproducibility.9 8 Report 10 Annex A (informative) Copper strip method to detect corrosive and potentially corrosive sul
20、phur in oil11 Annex B (informative) Analysis for copper sulphide on insulating paper by scanning electron microscope-energy dispersive X-ray spectrometry (SEM/EDX) 14 Bibliography16 BS EN 62535:200962535 IEC:2008 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INSULATING LIQUIDS TEST METHOD FOR DETECT
21、ION OF POTENTIALLY CORROSIVE SULPHUR IN USED AND UNUSED INSULATING OIL FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote intern
22、ational co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter
23、 referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participa
24、te in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an int
25、ernational consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reas
26、onable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IE
27、C Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its ap
28、proval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual
29、 experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this
30、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 elements of this
31、IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62535 has been prepared by IEC technical committee 10: Fluids for electrotechnical applications. The text of this standard is based on the
32、following documents: FDIS Report on voting 10/746/FDIS 10/749/RVD Full information on the voting for the approval of this standard 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, Part 2. BS EN 62535:2009
33、4 62535 IEC:2008 The committee has decided that the contents of this publication will remain unchanged until the maintenance result 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; wit
34、hdrawn; replaced by a revised edition; or amended. BS EN 62535:200962535 IEC:2008 5 INTRODUCTION In recent years, several failures of transformers and reactors due to copper sulphide formation in/on the cellulose insulation have been reported worldwide. The tendency of transformer oils to form coppe
35、r sulphide in the presence of copper is seen as one of the major contributing factors. The most common reason for such failures is arcing between adjacent disks or conductors of a winding, due to the formation of deposits of copper sulphide on the cellulosic insulating paper. It has been demonstrate
36、d that existing test methods for corrosive sulphur, ASTM D1275 method A and DIN 51353, are unable to detect oils having potentially corrosive behaviour. For this reason, IEC technical committee 10 has prepared this International Standard for the detection of potentially corrosive sulphur in mineral
37、insulating oils. The wrapped conductor test method is suitable for used and unused mineral oils. This test method is based on a study performed by Conseil International des Grands Rseaux Electriques (CIGRE) working group A2.32 11. Health and safety This International Standard does not purport to add
38、ress all the safety problems associated with its use. It is the responsibility of the user of the standard to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use. The mineral oils which are the subject of this standard should be ha
39、ndled with due regard to personal hygiene. Direct contact with eyes may cause slight irritation. In the case of eye contact, irrigation with copious quantities of clean running water should be carried out and medical advice sought. Some of the tests specified in this standard involve the use of proc
40、esses that could lead to a hazardous situation. Attention is drawn to the relevant standard for guidance. Environment This standard involves mineral oils, chemicals and used sample containers. The disposal of these items should be carried out in accordance with current national legislation with rega
41、rd to the impact on the environment. Every precaution should be taken to prevent the release into the environment of mineral oil. _ 1Figures in square brackets refer to the bibliography. BS EN 62535:2009 6 62535 IEC:2008 INSULATING LIQUIDS TEST METHOD FOR DETECTION OF POTENTIALLY CORROSIVE SULPHUR I
42、N USED AND UNUSED INSULATING OIL 1 Scope This International Standard specifies a test method for detection of potentially corrosive sulphur in used and unused mineral insulating oil. Most recent failures due to corrosive sulphur are related to the formation of copper sulphide deposits in and on the
43、surface of winding cellulosic paper. The test method uses a copper conductor, wrapped with one layer of paper, immersed in the oil and heated to evaluate the capability of the oil to yield copper sulphide and transfer it to paper layers. The growth of copper sulphide on bare copper may cause the pre
44、sence of conductive particulates in the oil, which can act as nuclei for electrical discharge and may lead to a fault. Other test methods exist using a bare copper strip immersed in oil and heated to detect the corrosive behaviour of oil against copper. ASTM D1275 Method B is also used for this test
45、 and a modified procedure using low oil volumes is included in Annex A. Tests with and without paper are considered as complementary and may lead to different results. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated referenc
46、es, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60475, Method of sampling liquid dielectrics IEC 60554-3-1, Specification for cellulosic papers for electrical purposes Part 3: Specifications for individ
47、ual materials Sheet 1: General purpose electrical paper ASTM D1275, Methods A and B: Standard test method for corrosive sulfur in electrical insulating oils ASTM D130, Standard test method for corrosiveness to copper from petroleum products by copper strip test DIN 51353, Testing of insulating oils;
48、 detection of corrosive sulfur; silver strip test EN 13601, Copper and copper alloys. Copper rod, bar and wire for general electrical purposes 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. BS EN 62535:200962535 IEC:2008 7 3.1 potentially corros
49、ive sulphur organo-sulphur compounds present in transformer oils that may cause copper sulphide formation. NOTE Some of these compounds may be initially corrosive, or become corrosive under certain operating conditions 4 Sampling Samples shall be taken, following the procedure given in IEC 60475. Ensure that the test portion is representative by thoroughly mixing. 5 Procedure 5.1 Principle A piece of copper conductor wrapped with Kraft paper is immersed in the
