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1、BRITISH STANDARD BS 3297-2: 1993 IEC 273:1990 Characteristics of indoor and outdoor post insulators for systems with nominal voltages greater than 1000 V (Implementation of CENELEC HD 578 S1) UDC 621.315.624:621.3.027.4 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:37 GMT+00:00 2006,
2、Uncontrolled Copy, (c) BSI BS 3297-2:1993 This British Standard, having been prepared under the direction of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 January 1993 BSI 04-2000 The following BSI re
3、ferences relate to the work on this standard: Committee reference PEL/70 Draft for comment 90/24326 DC ISBN 0 580 21454 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to
4、Technical Committee PEL/70, upon which the following bodies were represented: Association of Consulting Engineers Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) British Industrial Ceramic Manufacturers Association Electrical and Electronic Insulation Assoc
5、iation (BEAMA Ltd.) Electricity Association Transmission and Distribution Association (BEAMA Ltd.) The following bodies were also represented in the drafting of the standard, through subcommittees and panels: BECCAMA BEAMA Electrical Cable Connector and Accessories Manufacturers Association Amendmen
6、ts issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3297-2:1993 BSI 04-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of HD 578 S13 National ann
7、ex NA (informative) Cross-referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3297-2:1993 ii BSI 04-2000 National foreword This British Standard has been prepared under the direction of the Power Electrical Enginee
8、ring Standards Policy Committee. It implements Harmonization Document HD 578 S1 published by the European Committee for Electrotechnical Standardization (CENELEC). This British Standard is identical with IEC 273:1990 Characteristics of indoor and outdoor post insulators for systems with nominal volt
9、ages greater than 1 000 V, published by the International Electrotechnical Commission (IEC), which has been endorsed by CENELEC as HD 578 S1. This British Standard supersedes BS 3297-2:1982 which is withdrawn. A special national condition applicable to Germany is given in Annex ZB. The graphic signs
10、, symbols and letters used may be found in the following documents. National annex NA gives details of International Standards quoted in this standard for which there is an identical or technically equivalent British Standard. A British Standard does not purport to include all the necessary provisio
11、ns 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. BS 3939Graphical symbols for electrical power, telecommunications and electronics diagrams Part 1:1986 General Inf
12、ormation, general index Part 2:1985 Symbol elements, qualifying symbols and other symbols having general application Part 3:1985 Conductors and connecting devices Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the HD title page, pages 2 to 30, an insid
13、e 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 the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:37 GMT+00:00 2006, Uncontrolled Copy, (c)
14、 BSI HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT HD 578 S1 July 1992 UDC 621.315.624:621.3.027.4 Descriptors: Insulators, characteristics, systems, nominal voltages greater than 1 000 V English version Characteristics of indoor and outdoor post insulators for systems with
15、nominal voltages greater than 1 000 V (IEC 273:1990) Caractristiques des supports isolants dintrieur et dextrieur destins des installations de tension nominale suprieure 1 000 V (CEI 273:1990) Kenngren von Innenraum- und Freiluft- Sttzisolatoren fr Systeme mit Nennspannungen ber 1 000 V (IEC 273:199
16、0) This Harmonization Document was approved by CENELEC on 1991-09-23. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references co
17、ncerning national implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Fin
18、land, 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 Europisches Komitee fr Elektrotechnische N
19、ormung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1992 Copyright reserved to CENELEC members Ref. No. HD 578 S1:1992 E Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3297-2:1993 BSI 04-2000 2 Foreword The CENELEC questionna
20、ire procedure, performed for finding out whether or not the International Standard IEC 273:1990 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as Harmonization Document. The reference document was submitted to the CENELEC members f
21、or formal vote and was approved by CENELEC as HD 578 S1 on 23 September 1991. The following dates were fixed: For products which have complied with the relevant national standard before 1992-10-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply
22、for production until 1997-10-01. Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA and Annex ZB are normative. Contents Page Foreword2 Section 1. General 1Scope3 2Object3 3Electrical characteristics3 4Mechanical characteristics4 5Dimensional characterist
23、ics5 6Fixing arrangements6 7Plan of the standard6 8Designation of post insulators7 Section 2. Examples of insulator types Figure 1 Example of an indoor post insulator of ceramic material or glass8 Figure 2 Example of an indoor post insulator of organic material9 Figure 3 Example of an outdoor cylind
24、rical post insulator with internal metal fittings10 Figure 4 Example of an outdoor cylindrical post insulator with external metal fittings11 Page Figure 5 Example of an outdoor pedestal post insulator11 Section 3. Characteristics of standard post insulators Table I Indoor post insulators of ceramic
25、material or glass and with internal metal fittings12 Table IA Optional auxiliary holes in the top and/or bottom metal fitting13 Table II Indoor post insulators of organic material and with internal metal fittings13 Table IIA Optional auxiliary holes in the top and/or bottom metal fitting15 Table III
26、 Outdoor cylindrical post insulators of ceramic material or glass and with internal metal fittings15 Table IIIA Optional auxiliary holes in the top and/or bottom metal fittings16 Table IV Outdoor cylindrical post insulators of ceramic material or glass and with external metal fittings16 Table IVA St
27、andard fixing arrangements of outdoor cylindrical post insulators with external metal fittings19 Table V Outdoor pedestal post insulator units (metric units)20 Table VA Standard fixing arrangements of pedestal post insulators21 Table VI Outdoor pedestal post insulator units (inch-pound units)20 Tabl
28、e VIA Standard fixing arrangements of pedestal post insulators21 Table VII Outdoor pedestal post insulator units. Bending strength in stacks (metric units)21 Table VIII Outdoor pedestal post insulator units. Bending strength in stacks (inch-pound units)21 Appendix A22 Table AI Examples of compositio
29、n of outdoor pedestal post insulators (metric units)22 Table AII Examples of composition of outdoor pedestal post insulators (inch-pound units)25 Annex ZA (normative) Other international publications quoted in this standard with the references to relevant European publications28 Annex ZB (normative)
30、 Special national conditions29 latest date of announcement of the HD at national level(doa) 1992-04-01 latest date of publication of a harmonized national standard(dop) 1992-10-01 latest date of withdrawal of conflicting national standards(dow) 1992-10-01 Licensed Copy: sheffieldun sheffieldun, na,
31、Wed Nov 29 05:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3297-2:1993 BSI 04-20003 Section 1. General 1 Scope This standard applies to post insulators and post insulator units of ceramic material or glass intended for indoor or outdoor service, and to post insulators of organic material inte
32、nded for indoor service in electrical installations or equipment operating on alternating current systems with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. It may also be regarded as a provisional standard for insulators for use on direct current systems. The insul
33、ators covered by this standard are primarily intended for use in isolators (disconnectors) or as bus-bar or fuse supports. This standard covers five types of post insulators: a) indoor post insulators of ceramic material or glass and with internal metal fittings; b) indoor post insulators of organic
34、 material and with internal metal fittings; c) outdoor cylindrical post insulators of ceramic material or glass and with internal metal fittings; d) outdoor cylindrical post insulators of ceramic material or glass and with external metal fittings; e) outdoor pedestal post insulators of ceramic mater
35、ial or glass. The term “cylindrical insulators” is intended to cover insulators of the truncated conical form also. The five types of insulators are distinguished by their electrical, mechanical and dimensional characteristics. Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5 illustrate typical e
36、xamples of each type of insulator. These drawings are only general illustrations and other shapes and constructions are permitted. 2 Object This standard is intended to establish standard values of those electrical characteristics, mechanical characteristics and dimensions which are essential for th
37、e interchangeability of post insulators and post insulator units of the same type. NOTE 1General definitions and methods of test for insulators of ceramic material or glass are covered by IEC Publication 168. General definitions and methods of test for insulators of organic material are covered by I
38、EC Publication 660. NOTE 2The values of creepage distance as well as information on design aspects are provisional. These values are not directly related to the specified electrical characteristics. The performance of insulation under contaminated conditions has been considered, with the object of d
39、etermining the significant factors influencing performance. An application guide (IEC Publication 815) has been prepared recommending the range of suitable designs. The guide also indicates: definitions of the site severity different methods for determining the site severity corresponding creepage d
40、istance the significance and influence of different parameters characterising the insulator profiles the influence of the diameter the influence of the angle of the installation of the insulator alternative measures to be considered such as greasing or washing. 3 Electrical characteristics Each post
41、 insulator is designated for a specified lightning impulse withstand voltage based on the standardized values given in IEC Publication 71-1. The minimum height to be chosen is determined by one of the electrical characteristics given in the table, i.e. dry lightning impulse withstand voltage, wet po
42、wer frequency withstand voltage and wet switching impulse withstand voltage as applicable and according to the relevant insulation coordination requirements. The operating voltage is not specified because depending on service conditions, especially contamination, it cannot strictly be correlated wit
43、h the height of the post insulator. The composition of the post insulator, i.e. the number, the size and the positioning of insulator units is not specified. For a given height of a post insulator, however, the composition together with insulator profile and size and shape of metal parts can all aff
44、ect the electrical performance of the post insulator especially the wet switching impulse withstand voltage value. The rated switching impulse withstand voltage values are specified taking into account the above-mentioned facts as well as the high dispersion in wet switching impulse tests. However f
45、or many post insulator designs higher switching impulse withstand voltage values are obtainable. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3297-2:1993 4 BSI 04-2000 The rated withstand voltage requirements given in tables are for te
46、sts carried out on single post insulators in accordance with IEC Publication 168. With regard to this test arrangement the test conditions are favourable and may result in higher withstand voltages than in service applications. This applies in particular to complete disconnectors for which the actua
47、l withstand values may differ appreciably from those given in the tables. In these cases an insulator with a greater standard height may be chosen or special stress control fittings may be used. 4 Mechanical characteristics Post insulators are standardized in mechanical strength classes based on val
48、ues of the specified failing load in the bending test. These mechanical strength classes are as follows: a)Indoor post insulators of ceramic material or glass and with internal metal fittings Strength class22 000 N Strength class44 000 N Strength class88 000 N Strength class 1616 000 N Strength clas
49、s 2525 000 N b)Indoor post insulators of organic material and with internal metal fittings Strength class22 000 N Strength class44 000 N Strength class66 000 N Strength class88 000 N Strength class 1010 000 N Strength class 1616 000 N Strength class 2525 000 N c)Outdoor cylindrical post insulators of ceramic material or glass and with internal metal fittings Strength class22 000 N Strength class44 000 N Strength class88 000 N Strength class 1616 000 N Strength class 31,531 500 N d) Outdoor cy