1、BRITISH STANDARD BS EN 50387:2002 Busbar bushings up to 1 kV and from 1,25 kA to 5 kA, for liquid filled transformers The European Standard EN 50387:2002 has the status of a British Standard ICS 29.180 BS EN 50387:2002 This British Standard, was published under the authority of the Standards Policy
2、and Strategy Committee on 28 July 2003 BSI 28 July 2003 ISBN 0 580 42346 8 National foreword This British Standard is the official English language version of EN 50387:2002. It supersedes BS 7877:1999 which will be withdrawn on 2005-10-01. The UK participation in its preparation was entrusted by Tec
3、hnical Committee PEL/36, Insulators for power systems, to Subcommittee PEL/36/1, Bushing insulators, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement internati
4、onal or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport
5、to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee an
6、y enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an in
7、side back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50387 NORME EUROPENNE EUROPISCHE NORM November 2002 CENELEC European Committee for Electro
8、technical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No
9、. EN 50387:2002 E ICS 29.180 Supersedes HD 607 S1:1996English version Busbar bushings up to 1 kV and from 1,25 kA to 5 kA, for liquid filled transformers Traverses passe-barres jusqu 1 kV et de 1,25 kA 5 kA, pour transformateurs remplissage de liquide Schienendurchfhrungen bis 1 kV und von 1,25 kA b
10、is 5 kA fr flssigkeitsgefllte Transformatoren This European Standard was approved by CENELEC on 2002-10-01. CENELEC 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 alt
11、eration. 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 official versions (English, French, German). A version in any other language made by
12、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 committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Gr
13、eece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EN 50387:2002 - 2 - Foreword The text of the Harmonization Document HD 607 S1, prepared by the Technical Committee CENELEC TC 36A, Insulated bushings, wa
14、s approved by CENELEC on 1995-11-28. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 50387 on 2002-10-01. The following date was fixed: latest date by which the EN has to be implemented at national level by public
15、ation of an identical national standard or by endorsement (dop) 2003-10-01 _ - 3 - EN 50387:2002 Contents Page Introduction4 1 Scope.4 2 Definitions.4 3 Requirements4 3.1 Application4 3.2 Standard value of rated voltage (U r ) 4 3.3 Standard values of rated current (I r ) 4 3.4 Minimum nominal creep
16、age distance.4 3.5 Dielectric characteristics.4 3.6 Dimensions.5 Figure 1 Moulded indoor busbar bushing .5 Table 1 Standard dimensions.6 EN 50387:2002 - 4 - Introduction The object of this standard is to specify the cut-out in the cover or tank wall and details of the insulator and its mounting to e
17、nsure interchangeability of busbar insulators for rated voltages up to 1 000 V and rated currents from 1 250 A up to 5 000 A for insulating liquid filled transformers. 1 Scope This standard is applicable to moulded indoor busbar bushings for rated voltages up to 1 000 V, rated currents from 1 250 A
18、up to 5 000 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. NOTE These bushings are suitable for operation at 1,1 kV in compliance with HD 428.1 S1. 2 Definitions For the purposes of this standard, the following definition applies: 2.1 moulded indoor busbar bushin
19、g a bushing in which the insulation consists of moulded organic material with a single conductor 3 Requirements 3.1 Application Busbar bushings covered by this standard shall be suitable for operation under the following conditions: - with both ends fully immersed in an insulating liquid; - one end
20、fully or partially immersed in an insulating liquid and with the other end in air (indoor environment); - both ends in air (indoor environment) for special applications. 3.2 Standard value of rated voltage (U r ) The rated voltage U ris 1 000 V (phase to phase). 3.3 Standard values of rated current
21、(I r ) The values of I rshall be chosen from the standard values as given below, in amperes: 1 250 - 1 600 - 2 000 - 2 500 - 3 150 - 4 000 - 5 000 3.4 Minimum nominal creepage distance The minimum nominal creepage distance for bushing ends intended for use in air is 55 mm. 3.5 Dielectric characteris
22、tics Power-frequency withstand voltage (60 s): dry 10 kV Lightning impulse withstand voltage (1,2/50 s): 20 kV - 5 - EN 50387:2002 3.6 Dimensions The dimensions shall be as specified in Figure 1 and Table 1. The lengths of busbars and terminations are not covered by this standard. The busbar shall b
23、e made of copper unless otherwise agreed between the purchaser and the manufacturer, in which case the value of the rated current I rshall be amended. Figure 1 Moulded indoor busbar bushing 4 stud bolts M830 max. cut-out in cover overall dimensions max. EN 50387:2002 - 6 - Table 1 Standard dimension
24、s I rBusbar cross- section l 2l 3t 2l 4l 5l 6l 7l 8l 9(A) l 1(0,05) (mm) t 1(0,25) (mm) min. (mm) min. (mm) max. (mm) (mm) (mm) (mm) (mm) (mm) (mm) 1 250 63 12 45 22 8 102 120 38 89 75 80 1 600 63 12 45 22 8 102 120 38 89 75 80 2 000 63 20 45 22 8 102 120 56 89 75 80 2 500 100 12 45 22 10 102 164 38
25、 126 75 80 2 500 a63 35 45 22 10 102 120 61 89 75 80 3 150 120 12 45 32 10 145 190 58 158 110 110 4 000 120 20 45 32 10 145 190 58 158 110 110 5 000 120 20 45 32 10 145 190 58 158 110 110 aAlternative type. blankBS EN 50387:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institut
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