1、BRITISH STANDARD BS EN 60305:1996 IEC 305:1995 Insulators for overhead lines with a nominal voltage above 1 kV Ceramic or glass insulator units for a.c. systems Characteristics of insulator units of the cap and pin type The European Standard EN 60305:1996 has the status of a British Standard ICS 29.
2、080.10BSEN 60305:1996 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 August 1996 BSI 02-1999 The following BSI references relate to the work on this standard: Comm
3、ittee reference PEL/36/2 Draft for comment 93/217038 DC ISBN 0 580 26155 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee PEL/36, Insulators for power systems, to Subcommittee PEL/36/2, Line insulators, upon which the fo
4、llowing bodies were represented: Association of Consulting Engineers BEAMA Electrical Cable and Conductor Accessory Manufacturers Association British Industrial Ceramic Manufacturers Association British Railways Board Electrical and Electronic Insulation Association (BEAMA Ltd.) Electricity Associat
5、ion Amendments issued since publication Amd. No. Date CommentsBSEN 60305:1996 BSI 02-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope and object 3 2 Normative references 3 3 Mechanical and dimensional characteristics 3 4 Designation and marking 3
6、 5 Tolerances 4 Annex ZA (normative) Normative references to international publications with their corresponding European publications 7 Figure 1 String insulator unit with ball and socket couplings 4 Figure 2 String insulator unit with clevis and tongue couplings 6 Table 1 Specified values of mecha
7、nical and dimensional characteristics for string insulator units with ball and socket couplings 5 Table 2 Specified values of mechanical and dimensional characteristics for string insulator units with clevis and tongue couplings 6 List of references Inside back coverBSEN 60305:1996 ii BSI 02-1999 Na
8、tional foreword This British Standard has been prepared by Subcommittee PEL/36/2 and is the English language version of EN 60305:1996 Insulators for overhead lines with a nominal voltage above 1 kV Ceramic or glass insulator units for a.c. systems characteristics of insulator units of the cap and pi
9、n type, published by the European Committee for Electrotechnical standardization (CENELEC). It is identical with IEC 305:1995 published by the International Electrotechnical Commission (IEC). The foreword of the EN makes reference to the “date of withdrawal”, dow, of the relevant national standard.
10、In this case the relevant national standard is BS 137-2:1973 which will be withdrawn on 1996-12-01. 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
11、does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard HD 474 S1 (IEC 120:1984) BS 3288 Insulator and conductor fittings for overhead power lines Part 3:1989 Dimensions of ball and socket couplings of string insulator units
12、Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theENtitle page, pages 2 to 8, 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 t
13、able on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60305 March 1996 ICS 29.080.10 Descriptors: Insulators, overhead lines, ceramic or glass insulators, insulator units of the cap and pin type English version Insulators for overhead lines with a nominal voltage above1k
14、V Ceramic or glass insulator units for a.c. systems Characteristics of insulator units of the cap and pin type (IEC 305:1995) Isolateurs pour lignes ariennes de tension nominale suprieure 1 kV Elments disolateurs en matire cramique ou en verre pour systmes courant alternatif Caractristiques des lmen
15、ts disolateurs du type capot et tige (CEI 305:1995) Isolatoren fr Freileitungen mit einer Nennspannung ber 1 kV Keramik- oder Glasisolatoren fr Wechselpannungssysteme Kenngren von Kappenisolatoren (IEC 305:1995) This European Standard was approved by CENELEC on 1996-03-05. CENELEC members are bound
16、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 application to the Cent
17、ral 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 Secretariat has the same st
18、atus as the official versions. CENELEC 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 United Kingdom. CENELEC European Committee fo
19、r Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 60305:1996 EEN60305:1996 BSI 02-1999 2 Foreword The text
20、 of document 36B/139/DIS, future edition 4 of IEC 305, prepared by SC 36B, Insulators for overhead lines, of IEC TC 36, Insulators, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60305 on 1996-3-05. The following dates were fixed: Annexes designated “normative” are
21、part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-12-01 latest date by which the national sta
22、ndards conflictingwith the EN haveto be withdrawn (dow) 1996-12-01EN60305:1996 BSI 02-1999 3 1 Scope and object This International Standard applies to string insulator units of the cap and pin type with insulating parts of ceramic material or glass, intended for a.c. overhead lines with a nominal vo
23、ltage greater than 1000 V and a frequency not greater than 100 Hz. It also applies to insulators of similar design used in substations. This standard applies to string insulator units of the cap and pin type either with ball and socket couplings or with clevis and tongue couplings. This standard app
24、lies to string insulator units for use on overhead lines in clean areas and polluted areas. For use in areas characterized by very heavy pollution levels and for other particular or extreme environmental conditions, it may be necessary for certain dimensions to be changed and insulator units having
25、different creepage distances, spacing and forms may be preferred (for example, flat profile, hemispherical etc.). Insulators for use on d.c. systems may also need different dimensions. In any case, it is recommended that the standardized mechanical characteristics of the present International Standa
26、rd and coupling sizes are retained. The object of this standard is to prescribe specified values for the mechanical characteristics and for the main dimensions of string insulator units of the cap and pin type. The power frequency, lightning impulse and puncture withstand voltages of string insulato
27、r units are not specified in this standard. IEC 383-1 gives the electrical characteristics which define string insulator units; their values shall be agreed between purchaser and manufacturer. Ball and socket couplings are covered by IEC 120, clevis and tongue couplings by IEC 471. NOTEFor the defin
28、ition of pollution levels see IEC 815. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are s
29、ubject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC
30、120:1984, Dimensions of ball and socket couplings of string insulator units. IEC 383-1:1993, Insulators for overhead lines with a nominal voltage above 1 000 V Part 1: Ceramic or glass insulator units for a.c. systems Definitions, test methods and acceptance criteria. IEC 471:1977, Dimensions of cle
31、vis and tongue couplings of string insulator units. IEC 815:1986, Guide for the selection of insulators in respect of polluted conditions. 3 Mechanical and dimensional characteristics String insulator units of the cap and pin type are standardized by the following specified characteristics: electrom
32、echanical or mechanical failing load; maximum nominal diameter of the insulating part; nominal spacing; minimum nominal creepage distance; standard coupling. The corresponding values are indicated in Table 1 and Table 2. NOTE 1The following points merit attention for insulators for use in polluted a
33、reas. a) Even if the creepage distance is the same, the withstand voltage characteristics may change with shed shape of the insulators. b) Even if the string length is the same, the withstand voltage characteristics may decrease with increasing insulator strength due to the lower efficiency of creep
34、age distance for a larger average diameter. NOTE 2IEC 815 gives details on the important parameters of shed profiles for antipollution insulators. 4 Designation and marking Insulators are designated in Table 1 and Table 2 by the letter U followed by a number indicating the specified electromechanica
35、l or mechanical failing load in kilonewtons. The letter B or C which follows specifies a ball and socket or clevis and tongue, respectively. The following letter S or L, if present, specifies a short or long spacing. Long creepage distance insulators for polluted areas are designated by a final lett
36、er P. IEC 383-1 specifies that insulators shall be marked with the specified electromechanical or mechanical failing load. This load may be indicated by using the first part of the designation given in the first column of Table 1 and Table 2: For instance, the insulator may be marked U 160 for the u
37、nits U 160 BS, U160BL and U 160 BLP.EN60305:1996 4 BSI 02-1999 5 Tolerances Except for nominal spacing, tolerances for dimensions indicated in IEC 383-1 are applicable to all nominal values including maximum nominal diameter and minimum nominal creepage distance values given in Table 1 and Table 2.
38、Nominal spacing tolerance shall be: (0,03 P + 0,3) mm P being spacing expressed in millimetres. Figure 1 String insulator unit with ball and socket couplingEN60305:1996 BSI 02-1999 5 Table 1 Specified values of mechanical and dimensional characteristics for string insulator units with ball and socke
39、t couplings Dsignation Designation Effort de rupture lectromcanique ou mcanique Electromechanical or mechanical failing load kN Diamtre nominal maximal de la partie isolante Maximum nominal diameter of the insulating part D mm Pas nominal Nominal spacing P mm Ligne de fuite nominale minimale Minimum
40、 nominal creepage distance mm Norme dassemblage suivant la CEI 120 Standard coupling according to IEC 120 d1 U40 B U40 BP U70 BS U70 BL U70 BLP U 100 BS U 100 BL U 100 BLP U 120 B U 120 BP U 160 BS U 160 BSP U 160 BL U 160 BLP U 210 B U 210 BP U 300 B U 300 BP U 400 B U 530 B 40 40 70 70 70 100 100
41、100 120 120 160 160 160 160 210 210 300 300 400 530 175 210 255 255 280 255 255 280 255 280 280 330 280 330 300 330 330 400 380 380 110 110 127 146 146 127 146 146 146 146 146 146 170 170 170 170 195 195 205 240 190 295 295 295 440 295 295 440 295 440 315 440 340 525 370 525 390 590 525 600 11 11 16
42、 16 16 16 16 16 16 16 20 20 20 20 20 20 24 24 28 32EN60305:1996 6 BSI 02-1999 Table 2 Specified values of mechanical and dimensional characteristics for string insulator units with clevis and tongue couplings Figure 2 String insulator unit with clevis and tongue couplings Dsignation Designation Effo
43、rt de rupture lectromcanique ou mcanique Electromechanical or mechanical failing load kN Diamtre nominal maximal de la partie isolante Maximum nominal diameter of the insulating part D mm Pas nominal Nominal spacing P mm Ligne de fuite nominale minimale Minimum nominal creepage distance mm Norme das
44、semblage suivant la CEI 471 Standard coupling according to IEC 471 U70 C U70 CP U 100 C U 100 CP U 120 C U 120 CP U 160 C U 160 CP U 210 C U 210 CP 70 70 100 100 120 120 160 160 210 210 255 280 255 280 255 280 280 330 300 330 146 146 146 146 146 146 170 170 178 178 295 440 295 440 295 440 340 525 37
45、0 525 16 C 16 C 16 C 16 C 16 C 16 C 19 C 19 C 22 C 22 C NOTELes isolateurs dont leffort de rupture lectromcanique ou mcanique est suprieur 210 kN ne sont pas spcifis. Si ncessaire, on utilisera de prfrence les isolateurs avec assemblage rotule et logement de rotule dfinis dans le tableau 1. NOTEInsu
46、lators having an electromechanical or mechanical failing load exceeding 210 kN are not specified. If necessary, the insulators with ball and socket coupling defined in Table 1 shall preferably be used.EN60305:1996 BSI 02-1999 7 Annex ZA (normative) Normative references to international publications
47、with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent
48、 amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). NOTEWhen an international publication has been modi
49、fied by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 120 1984 Dimensions of ball and socket couplings of string insulatorunits HD 474 S1 1986 IEC 383-1 1993 Insulators for overhead lines with a nominal voltage above1kV Part 1: Ceramic or glass insulators units for a.c. systems Definitions, test methods and acceptance criteria IEC 471 1977 Dimensions of clevis and tongue couplings of string insulatorunits I
