BS EN 60383-2-1995 Insulators for overhead lines with a nominal voltage above 1000 V Insulator strings and insulator sets for a c systems - Definitions test methods and acceptance .pdf

1、BRITISH STANDARD BS EN 60383-2:1995 Insulators for overhead lines with a nominal voltage above 1000 V Part 2: Insulator strings and insulator sets for a.c. systems Definitions, test methods and acceptance criteria The European Standard EN60383-2:1995 has the status of a British Standard ICS 29.080.1

2、0BS EN 60383-2:1995 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15 November 1995 BSI 03-1999 The following BSI references relate to the work on this standard: Comm

3、ittee reference PEL/36 Draft for comment 92/21397 DC ISBN 0 580 24680 9 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 o

4、f Consulting Engineers Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) British Industrial Ceramic Manufacturers Association British Railways Board Electrical and Electronic Insulation Association (BEAMA Ltd.) Electricity Association Overhead Transmission Li

5、ne Contractors (BEAMA Ltd.) Transmission and Distribution Association (BEAMA Ltd.) The following body was also represented in the drafting of the standard, through subcommittees and panels: BEAMA Electrical Cable and Conductor Accessory Manufacturers Association Amendments issued since publication A

6、md. No. Date CommentsBS EN 60383-2:1995 BSI 03-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 60383-2 3 List of references Inside back coverBS EN 60383-2:1995 ii BSI 03-1999 National foreword This British Standard has been prepared by Techni

7、cal Committee PEL/36 and is the English language version of EN60383-2:1995 Insulators for overhead lines with a nominal voltage above1 000 V Part 2: Insulator strings and insulator sets for a.c. systems Definitions, test methods and acceptance criteria, published by the European Committee for Electr

8、otechnical Standardization (CENELEC). It is identical with IEC 383-2:1993, published by the International Electrotechnical Commission (IEC). This British Standard supersedes BS137-1:1982 which is withdrawn. That document was based in part on IEC383-1, which is envisaged to be adopted by CENELEC as E

9、N60383-1. 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 obligations. Cross-references Publications r

10、eferred to Corresponding British Standard IEC 50(471):1984 BS 4727 Glossary of electrotechnical, power, telecommunications, electronics, lighting and colour terms Part 1 Terms common to power, telecommunications and electronics Group 12:1991 Insulators HD 588.1 S1:1991 (IEC 60-1:1989) BS 923: Guide

11、on high-voltage testing techniques Part 1:1990 General BS 5622: Guide for insulation co-ordination IEC 71-1:1976 Part 1:1979 Terms, definitions, principles and rules HD 540.2 S1:1991 (IEC 71-2:1976) Part 2:1979 Application guide Summary of pages This document comprises a front cover, an inside front

12、 cover, pages i and ii, theEN title page, pages 2 to 10, 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 the amendment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROP

13、ISCHE NORM EN60383-2 January 1995 ICS 29.080.10 Descriptors: Overhead lines, insulators, insulator strings English version Insulators for overhead lines with a nominal voltage above1000 V Part 2: Insulator strings and insulator sets fora.c. systems Definitions, test methods and acceptancecriteria (I

14、EC 383-2:1993) Isolateurs pour lignes ariennes de tension nominale suprieure a 1000V Partie 2: Chanes disolateurs et chanes disolateurs quipes pour systmes courant alternatif Dfinitions, mthodes dessai et critres dacceptation (CEI 383-2:1993) Isolatoren fr Freileitungen mit einer Nennspannung ber 10

15、00V Teil 2: Isolatorstrnge und Isolatorketten fr Wechselstromsysteme Begriffe, Prfverfahren und Annahmekriterien (IEC 383-2:1993) This European Standard was approved by CENELEC on 1994-12-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions

16、 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 member. This European Standard exists in three o

17、fficial 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. CENELEC members are the national electrotechnical c

18、ommittees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique

19、 Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60383-2:1995 EEN 60383-2:1995 2 BSI 03-1999 Foreword The text of the International Standard IEC383-2:1993, prepared by SC 36B, Insulators

20、for overhead lines, of IEC TC36, Insulators, was submitted to the formal vote and was approved by CENELEC as EN60383-2 on 1994-12-06 without any modification. The following dates were fixed: For products which have complied with the relevant national standard before 1995-12-01, as shown by the manuf

21、acturer or by a certification body, this previous standard may continue to apply for production until2000-12-01. Contents Page Foreword 2 Section 1. General 1 Scope 3 2 Normative references 3 3 Definitions 3 3.1 Insulator string 3 3.2 Insulator set 3 3.3 Flash-over 4 3.4 Dry lightning impulse withst

22、and voltage 4 3.5 50% dry lightning impulse flash-over voltage 4 3.6 Wet power-frequency withstand voltage 4 3.7 Wet power-frequency flash-over voltage 4 3.8 Wet switching impulse withstand voltage 4 3.9 50% wet switching impulse flash-over voltage 4 4 Electrical values which characterize an insulat

23、or string or an insulator set 4 Section 2. Test procedures for electrical tests 5 General requirements for high voltage tests 6 Page 6 Standard atmospheric conditions and correction factors for electrical tests 6 6.1 Standard reference atmosphere 6 6.2 Correction factors for atmospheric conditions 6

24、 7 Artificial rain parameters for wet tests 6 8 Mounting arrangements for electrical tests 6 9 Lightning impulse voltage tests 6 10 Wet power-frequency voltage tests 7 11 Wet switching impulse voltage tests 7 12 Methods of mounting 7 12.1 Standard mounting arrangement of an insulator string or insul

25、ator set when switching impulse tests are not required 8 12.2 Standard mounting arrangement of an insulator string or insulator set when switching impulse tests are required 8 12.3 Mounting arrangement reproducing service conditions 8 Annex A (informative) List of normative documents given for infor

26、mation 9 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 9 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1995-12-01 l

27、atest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1995-12-01EN 60383-2:1995 BSI 03-1999 3 Section 1. General 1 Scope This part of IEC 383 applies to insulator strings and insulator sets comprising string insulator units of ceramic material or glass for use

28、 on a.c. overhead power lines with a nominal voltage greater than1000V and a frequency not greater than100Hz. This part of IEC383 also applies to insulator strings and insulator sets for use on d.c. overhead electric traction lines. This part of IEC 383 also applies to insulator strings and insulato

29、r sets of similar design when used in substations. It may be regarded as a provisional standard for insulator strings and insulator sets for use on d.c. overhead power lines and for composite insulator sets. The object of this part of IEC383 is to prescribe standard electrical test procedures and ac

30、ceptance criteria to verify the defined characteristics of insulator strings and insulator sets falling within the scope of the part of IEC383. These tests and characteristics are intended to give a common base to designers, users and suppliers of overhead lines, insulators and line equipment when d

31、efinition, evaluation or verification of the electrical characteristics of such equipment is required. These tests are not intended to be mandatory tests on insulators whether supplied individually or as strings or as sets. NOTE 1Tests on string insulator units are dealt with in IEC383-1. Tests on c

32、omposite insulators are dealt with in IEC1109. NOTE 2This part does not include artificial pollution or radio-interference tests. These subjects and relevant test methods are dealt with in the following IEC reports: IEC437: Report radio interference test on high-voltage insulators. IEC507: Report ar

33、tificial pollution tests on high-voltage insulators to be used on a.c. systems. NOTE 3Power arc tests are currently under study. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 383. At the ti

34、me of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 383 are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC

35、and ISO maintain registers of currently valid International Standards. IEC 50(471):1974, International Electrotechnical Vocabulary (IEV) Chapter 471: Insulators. IEC 60-1:1989, High-voltage test techniques Part1: General definitions and test requirements. IEC 71-1:1976, Insulation co-ordination Part

36、 1: Terms, definitions, principles and rules. IEC 71-2:1976, Insulation co-ordination Part 2: Application guide. IEC 71-3:1982, Insulation co-ordination Part 3: Phase-to-phase insulation co-ordination Principles, rules and application guide. 3 Definitions The definitions given below are those which

37、either do not appear in IEC50(471) or differ from those given in IEC50(471). The term “insulator” is used in this part of IEC383 to refer to the object being tested. 3.1 insulator string one or more string connected insulator units and intended to give flexible support to overhead line conductors an

38、d stressed mainly in tension 3.2 Insulator set An assembly of one or more insulator strings suitably connected together, complete with fixing and protective devices as required in service.EN 60383-2:1995 4 BSI 03-1999 3.2.1 suspension insulator set an insulator set complete with fittings to carry a

39、line conductor or conductors at its lower end 3.2.2 tension insulator set an insulator set complete with fittings to secure a line conductor or conductors in tension 3.3 flash-over a disruptive discharge external to the insulation, connecting those parts which normally have the operating voltage bet

40、ween them NOTEThe term “flash-over” used in this part includes a flash-over across the insulator surface as well as disruptive discharge by spark-over through air adjacent to the insulator. 3.4 dry lightning impulse withstand voltage the lightning impulse voltage which the insulator withstands dry,

41、under the prescribed conditions of test 3.5 50% dry lightning impulse flash-over voltage the value of the lightning impulse voltage which, under the prescribed conditions of test, has a 50% probability of producing flash-over on the insulator, dry 3.6 wet power-frequency withstand voltage the power-

42、frequency voltage which the insulator withstands wet, under the prescribed conditions of test 3.7 wet power-frequency flash-over voltage the arithmetic mean of the measured voltages which cause flash-over of the insulator under the prescribed conditions of test 3.8 wet switching impulse withstand vo

43、ltage the switching impulse voltage which the insulator withstands wet, under the prescribed conditions of test 3.9 50% wet switching impulse flash-over voltage the value of the switching impulse voltage which, under the prescribed conditions of test, has a 50% probability of producing flash-over on

44、 the insulator, wet 4 Electrical values which characterize an insulator string or an insulator set An insulator string or an insulator set is characterized by one or more of the following electrical values: a) the specified dry lightning impulse withstand voltage; b) the specified wet switching impu

45、lse withstand voltage; c) the specified wet power-frequency withstand voltage. The applicability of these characteristics as a function of the highest voltage for equipment shall be determined by reference to IEC71-1,IEC71-2 and IEC71-3 Insulation co-ordination. Operating voltage is not to be consid

46、ered as a characteristic of an insulator string or an insulator set. The flash-over and withstand voltages of insulators under service conditions may differ from the flash-over and withstand voltages under standard conditions. This effect has been recognized with lightning impulse testing, especiall

47、y for very high voltages of equipment, but the effect of ambient conditions and the arrangement of insulators and associated metalwork is much greater with switching impulses due to the differences in electric field distribution between the standard test arrangement and the mounting arrangement in s

48、ervice.EN 60383-2:1995 BSI 03-1999 5 The switching impulse withstand voltage of an insulator string or an insulator set is not necessarily a definite characteristic because it is determined to a large extent by the tower structure and the field configuration which depends on the shape and relative p

49、ositions of all the metal parts. Therefore, the verification of the specified switching impulse withstand voltage is generally required with a mounting arrangement which closely represents service conditions. The details of the mounting arrangement shall then be agreed between the manufacturer and the purchaser at the time of ordering.EN 60383-2:1995 6 BSI 03-1999 Section 2. Test procedures for electrical tests 5 General requirements for high voltage tests a) The lightning and switching impulse voltage and power-frequ