BS EN 61325-1996 Insulators for overhead lines with a nominal voltage above 1000 V Ceramic or glass insulator units for d c systems - Definitions test methods and acceptance criter.pdf

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1、BRITISH STANDARD BS EN 61325:1996 IEC1325:1995 Insulators for overhead lines with a nominal voltage above1000 V Ceramic or glass insulator units ford.c.systems Definitions,test methods and acceptance criteria The European Standard EN61325:1995 has the status of a British Standard ICS 29.080.10BSEN61

2、325:1996 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes into effect on 15 February 1996 BSI 12-1999 The following BSI references relate to the work on this standard: Committee refe

3、rence PEL/36 Draft for comment 92/32345 DC ISBN 0 580 24966 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PEL/36, Insulators for power systems, upon which the following bodies were represented: Association of Consulti

4、ng Engineers Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) BEAMA Electrical Cable and Conductor Accessory Manufacturers Association British Industrial Ceramic Manufacturers Association British Railways Board Electricity Association Electrical and Electron

5、ic Insulation Association (BEAMA Ltd.) Overhead Transmission Line Contractors (BEAMA Ltd.) Transmission and Distribution Association Amendments issued since publication Amd. No. Date CommentsBSEN61325:1996 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii For

6、eword 2 Text of EN 61325 5 List of references Inside back coverBSEN61325:1996 ii BSI 12-1999 National foreword This British Standard has been prepared by Technical Committee PEL/36 and isthe English language version of EN61325:1995 Insulators for overhead lines with a nominal voltage above1000V. Cer

7、amic or glass insulator units for d.c. systems. Definitions, test methods and acceptance criteria, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical withIEC1325:1995 published by the International Electrotechnical Commission(IEC). The graphical signs

8、, symbols and letters used in this standard may be found in the following British Standards: BS 3939 Graphical symbols for electrical power, telecommunications and electronics diagrams Part 1:1986 General information, general index (Related to IEC617-1) Part2:1985 Symbol elements, qualifying symbols

9、 and other symbols having general application (Identical with IEC617-2) Cross-references Publication referred to Corresponding British Standard IEC 50 (471):1984 BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part1 Terms common to power, teleco

10、mmunications and electronics Group 12:1991 Insulators HD 588.1 S1:1991 BS 923 Guide on high-voltage testing techniques (IEC 60-1:1989) Part1:1990 General HD 474 S1:1986 (IEC 120:1984) BS 3288 Insulator and conductor fittings for overhead power lines Part3:1989 Dimensions of ball and socket couplings

11、 of string insulator units IEC 305:1978 BS 137 Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than1000V Part2:1973 Requirements IEC 372:1984 BS3288 Insulator and conductor fittings for overhead power lines Part4:1989 Locking devices for ball and socket coup

12、lings of string insulator units: dimensions and tests IEC 1245:1993 BS 7744:1994 Guide to artificial pollution tests on high voltage insulators to be used on d.c. systems BS 5411 Methods of test for metallic and related coatings ISO 1463:1982 Part5:1984 Measurement of local thickness of metal andoxi

13、de coatings by the microscopical examination of cross-sections ISO 2064:1980 Part1:1980 Definitions and conventions concerning the measurement of thickness ISO 2178:1982 Part11:1984 Measurement of coating thickness of non-magnetic metallic and vitreous or porcelain enamel coatings on magnetic basis

14、metals: magnetic methodBSEN61325:1996 BSI 12-1999 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal

15、obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, theENtitle page, pages 2 to 38, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in th

16、e amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61325 June 1995 ICS 29.080.10 Descriptors: Overhead lines, insulators, ceramic or glass d.c. systems English version Insulators for overhead lines with a nominal voltage above1000V Ceramic or gla

17、ss insulator units for d.c. systems Definitions,test methods and acceptance criteria (IEC1325:1995) Isolateurs pour lignes ariennes de tension nominale suprieure 1000V Elmentsdisolateurs en cramique ou en verre pour systmes courant continu Dfinitions,mthodes dessai et critres dacceptation (CEI1325:1

18、995) Isolatoren fr Freileitungen mit einer Nennspannung ber1000V Keramik- oder Glasisolatoren fr Gleichspannungssysteme Begriffe,Prfverfahren und Annahmekriterien (IEC 1325:1995) This European Standard was approved by CENELEC on 1995-05-15. CENELEC members are bound to comply with the CEN/CENELEC In

19、ternal 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 application to the Central Secretariat or to any CENELEC

20、 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 Secretariat has the same status as the official versions. CE

21、NELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization

22、 Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 61325:1995 EEN61325:1995 BSI 12-1999 2 Foreword The text of document 36B(CO)112, future ed

23、ition1 of IEC1325, prepared by SC36B, Insulators for overhead lines, of IECTC36, Insulators, was submitted to the IEC-CENELEC parallel vote andwas approved by CENELEC as EN61325 on1995-05-15. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes

24、 designated “informative” are given for information only. In this standard,Annex ZA is normative andAnnex A andAnnex B are informative. Annex ZA has been added by CENELEC. latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endors

25、ement (dop) 1996-02-15 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1996-02-15EN61325:1995 BSI 12-1999 3 Contents Page Foreword 2 Section 1. General 1 Scope 5 2 Normative references 5 3 Definitions 6 Section 2. Insulators 4 Insulator classes and type

26、 8 5 Insulating materials 8 6 Specified characteristics and features of a d.c. insulator unit 9 7 Identification of insulators 9 Section 3. Classification of tests, sampling rules and procedures 8 Classification of tests 9 8.1 Type tests 9 8.2 Sample tests 10 8.3 Routine tests 10 9 Quality assurance

27、 10 10 Procedures for type and sample tests 10 10.1 Insulator selection for type tests 10 10.2 Sampling rules and procedures for sample tests 10 10.3 Re-test procedure for the sample tests 11 Section 4. Test procedures for electrical tests 11 General requirements for high-voltage tests 11 12 Standar

28、d atmospheric conditions and correction factors for electrical tests 11 12.1 Standard reference atmosphere 11 12.2 Correction factors for atmospheric conditions 12 13 Mounting arrangements for electrical tests 12 14 Lightning impulse voltage tests 12 14.1 Test procedure 12 14.2 Acceptance criteria 1

29、2 15 Dry d.c. voltage tests 13 15.1 Test procedure 13 15.2 Acceptance criteria 13 16 SF 6puncture withstand test 13 16.1 Test method 13 16.2 Acceptance criteria 13 Page 17 Impulse overvoltage puncture withstand test 13 18 Ion migration test 14 18.1 Reference conditions used to calculate the expected

30、 charge 14 18.2 Test validity 14 18.3 Test procedure 14 18.4 Acceptance criteria 15 19 Electrical body resistance test 15 19.1 Test procedure 15 19.2 Acceptance criteria 16 20 Thermal runaway test 16 20.1 Duration 16 20.2 Procedure 16 20.3 Acceptance criteria 16 21 Routine electrical test 16 Section

31、 5. Test procedures for mechanical and other tests 22 Verification of the dimensions 17 23 Electromechanical failing load test 17 23.1 Test procedure 17 23.2 Acceptance criteria 17 23.3 Coefficient for type tests 18 23.4 Coefficients for sample tests 18 24 Mechanical failing load test 19 24.1 Test p

32、rocedure 19 24.2 Acceptance criteria 19 25 Thermal-mechanical performance test 19 25.1 Test procedure 19 25.2 Acceptance criteria 19 26 Residual mechanical strength test 19 26.1 Previous tests 19 26.2 Preparation of the test pieces 19 26.3 Test procedure 20 26.4 Test results 20 26.5 Acceptance crite

33、ria for the type test 20 26.6 Acceptance criteria for the sample test 20 26.7 Comparison between type and sample test results 20 27 Verification of the axial, radial and angular displacements 20 27.1 Test procedure 20 27.2 Acceptance criteria for cap and pin insulators 21EN61325:1995 4 BSI 12-1999 P

34、age 27.3 Acceptance criteria for long rod insulators 21 28 Verification of the locking system 21 28.1 Conformity of the locking device 21 28.2 Verification of locking 22 28.3 Position of the locking device 22 28.4 Procedure for the operation test 22 28.5 Acceptance criteria for the operation test 22

35、 29 Temperature cycle test 22 29.1 Test procedure for string insulator units composed of ceramic material 22 29.2 Special test procedure for insulators with thick sections or very large insulators 23 29.3 Complementary specifications 23 29.4 Acceptance criteria 23 30 Thermal shock test 23 30.1 Test

36、procedure 23 30.2 Acceptance criteria 23 31 Porosity test 24 31.1 Test procedure 24 31.2 Acceptance criteria 24 32 Galvanizing test 24 32.1 Test procedures 24 32.2 Acceptance criteria 24 33 Routine visual inspection 25 33.1 Insulators with ceramic insulating parts 25 33.2 Insulators with glass insul

37、ating parts 26 34 Routine mechanical test 26 35 Zinc sleeve test 26 35.1 General requirements concerning the zinc sleeve 26 35.2 Type test procedure 26 35.3 Sample test procedure 26 36 Zinc collar test 26 36.1 General requirements for zinc collar 26 36.2 Type and sample test procedure 27 Section 6.

38、Tests on string insulator units 37 General 27 Annex A (informative) Method of comparison of the results of the electromechanicalor mechanical failing load type and sample tests 34 Page Annex B (informative) Bibliography 35 Annex ZA (normative) Normative references to international publications with

39、their corresponding European publications 36 Figure 1 Suggested mounting arrangement for the SF 6puncture withstand test 31 Figure 2 Suggested arrangement for body resistance measurements 31 Figure 3 Schematic representation of thethermal-mechanical performance test 32 Figure 4 Measurement of axial

40、and radialdisplacements 32 Figure 5 Measurement of the angular displacements 33 Figure 6 Greatest thickness of the insulator 33 Table 1 Cross-reference table for cap and pin insulators 28 Table 2 Cross-reference table for long rodinsulators 29EN61325:1995 BSI 12-1999 5 Section 1. General 1 Scope Thi

41、s International Standard is applicable to string insulator units of ceramic material or glass for use on d.c. overhead power lines with a nominal voltage greater than1000V. It is not applicable to composite insulators. The application of this standard to insulators for use in other situations under

42、d.c. voltage will be left to the relevant technical committees. This standard specifies: the characteristics of insulators; the conditions under which the specified values of these characteristics shall be verified; acceptance criteria. It specifies basic characteristic tests in a manner similar to

43、that of IEC383-1. Certain additional tests have been found to be necessary to ensure satisfactory long-term performance of d.c. insulators. At present, these additional tests concern only cap and pin insulators. In view of the lack of significant performance data regarding long rod insulators on d.c

44、. lines, it is not possible at present to define or validate special d.c.-oriented tests for such insulators. This standard does not include requirements, or special tests, dealing with the choice of insulators for specific operating conditions (e.g.ageing arising from specific operating conditions)

45、. NOTE 1This standard does not include radio interference tests, artificial pollution tests or tests on insulator sets. These subjects and some relevant test methods are dealt with in the following IEC Publications: IEC383-2, IEC437 and IEC1245. NOTE 2Many of the requirements and tests in this stand

46、ard are relevant to insulators for use on d.c. traction lines, but other tests may be required. Reference can be made to IEC383-1. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard.

47、At the time of publication, the editions indicated were valid. Allnormative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below.

48、Members of IEC and ISO maintain registers of currently valid International Standards. IEC 50(471):1984, International Electrotechnical Vocabulary (IEV) Chapter471: Insulators. IEC 60-1:1989, High-voltage test techniques General definitions and test requirements. IEC 120:1984, Dimensions of ball and

49、socket couplings of string insulator units. IEC 305:1978, Characteristics of string insulator units of the cap and pin type. IEC 372:1984, Locking devices for ball and socket couplings of string insulator units Dimensions and tests. IEC 383-1:1993, Insulators for overhead lines with a nominal voltage above1000V Part1: Ceramic or glass insulator units for a.c. systems Definitions, test methods and acceptance criteria. IEC 433:1980, Characteristics of string insulator units of the long rod type. IEC 471:1977, Dim