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    EN 50464-2-3-2007 en Three-phase oil-immersed distribution transformers 50 Hz from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV - Part 2-3 Distributio.pdf

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    EN 50464-2-3-2007 en Three-phase oil-immersed distribution transformers 50 Hz from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV - Part 2-3 Distributio.pdf

    1、BRITISH STANDARDBS EN 50464-2-3:2007Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV Part 2-3: Distribution transformers with cable boxes on the high-voltage and/or low-voltage side Cable boxes type 2 for use on

    2、 distribution transformers meeting the requirements of EN 50464-2-1The European Standard EN 50464-2-3:2007 has the status of a British StandardICS 29.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g

    3、40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 50464-2-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI 2007ISBN 978 0 580 57700 0National forewordThis British Standard is the UK implementation of EN 50464-

    4、2-3:2007. It supersedes BS 7821-2.3:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to i

    5、nclude all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 50464-2-3 NORME EUROPENNE EUROPISCHE NOR

    6、M April 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any me

    7、ans reserved worldwide for CENELEC members. Ref. No. EN 50464-2-3:2007 E ICS 29.180 Supersedes HD 428.2.3 S1:1998English version Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV - Part 2-3: Distribution transfor

    8、mers with cable boxes on the high-voltage and/or low-voltage side - Cable boxes type 2 for use on distribution transformers meeting the requirements of EN 50464-2-1 Transformateurs triphass de distribution immergs dans lhuile, 50 Hz, de 50 kVA 2 500 kVA, de tension la plus leve pour le matriel ne dp

    9、assant pas 36 kV - Partie 2-3: Transformateurs de distributionraccords par botes cble ct haute tension et/ou ct basse tension - Botes cbles de type 2 pour utilisation sur transformateurs de distribution conformes aux exigences de la EN 50464-2-1 lgefllte Drehstrom-Verteilungstransformatoren 50 Hz, 5

    10、0 kVA bis 2 500 kVA, mit einer hchsten Spannung fr Betriebsmittel bis 36 kV - Teil 2-3: Verteilungstransformatoren mit Kabelanschlussksten auf der Ober- und/oder Unterspannungsseite - Kabelanschlussksten Typ 2 fr Verteilungstransformatoren nach EN 50464-2-1 This European Standard was approved by CEN

    11、ELEC on 2006-12-01. 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 alteration. Up-to-date lists and bibliographical references concerning such national standa

    12、rds 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 translation under the responsibility of a CENELEC member into its own language and notif

    13、ied to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania

    14、, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 50464-2-3:2007 - 2 - Foreword The text of the Harmonization Document HD 428.2.3 S1:1998, prepared by the Technical Committee CENELEC TC 14, Power transfo

    15、rmers, was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 50464-2-3 on 2006-12-01. The following date was fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsem

    16、ent (dop) 2007-12-01 The EN 50464 series consists of the following parts, under the general title “Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV”: Part 1 General requirements Part 2-1 Distribution transformer

    17、s with cable boxes on the high-voltage and/or low-voltage side General requirements Part 2-2 Distribution transformers with cable boxes on the high-voltage and/or low-voltage side Cable boxes type 1 for use on distribution transformers meeting the requirements of EN 50464-2-1 Part 2-3 Distribution t

    18、ransformers with cable boxes on the high-voltage and/or low-voltage side Cable boxes type 2 for use on distribution transformers meeting the requirements of EN 50464-2-1 Part 3 Determination of the power rating of a transformer loaded with non-sinusoidal currents Part 4 Requirements and tests concer

    19、ning pressurised corrugated tanks - 3 - EN 50464-2-3:2007 Contents 1 Scope4 1.1 High-voltage side. 4 1.2 Low-voltage side . 4 2 Normative references4 3 Definitions4 4 High-voltage connections 4 5 Low-voltage connections.6 6 Design.8 7 Test.8 Figures Figure 1 High-voltage connection directly to bushi

    20、ngs 5 Figure 2 High-voltage connection via busbar system 6 Figure 3 Low-voltage connection directly to bushings .7 Figure 4 Low-voltage connection to busbar system 7 Table Table 1 Minimum distances in the cable box 5 EN 50464-2-3:2007 - 4 - 1 Scope Cable boxes described in this European Standard cor

    21、respond to cable boxes Type 2 in EN 50464-2-1 and are suitable for assembly on the cover of oil-immersed distribution transformers meeting the requirements of EN 50464-2-1. Cable boxes are air-filled, metal- or non-metal enclosed, for high- and/or low-voltage connections in the following variations:

    22、 1.1 High-voltage side a) Connection directly to bushings; b) Connection via busbar system. 1.2 Low-voltage side a) Connection directly to bushings (maximum of four connectors per bushing); b) Connection via busbar system. 2 Normative references For the purposes of this document, the normative refer

    23、ences of EN 50464-2-2 apply. 3 Definitions For the purposes of this document, the terms and definitions of EN 50464-2-2 apply. 4 High-voltage connections High-voltage bushings shall preferably be in accordance with EN 50180, pollution class II. Dimension D, which is the minimum distance between live

    24、 parts and between live parts and earth, is given in Table 1 and indicated in Figures 1 and 2. The value of D may be decreased by inserting barriers of insulating material. In this case, the insulation level shall be demonstrated by test. Busbars in Figure 2 shall be dimensioned by reference to rate

    25、d currents and short-circuit forces. Connection may be by single- or multi-core cables. Figures 1 and 2 show typical arrangements; the actual design may vary. - 5 - EN 50464-2-3:2007 Table 1 Minimum distances in the cable box UMRated short duration power frequency withstand voltage (r.m.s.) Rated li

    26、ghtning impulse withstand voltage (peak) Minimum clearance D kV kV kV mm List 1 List 2 List 1 List 2 3,6 10 20 40 - 60 7,2 20 40 60 60 90 12 28 60 75 90 125 17,5 38 75 95 125 170 24 50 95 125 170 225 36 70 145 170 275 315 NOTE Values in the table according to EN 60076-3, Table 2. Figure 1 High-volta

    27、ge connection directly to bushings The details of the cable entry, dimension L (distance between the cable entry and the bushing connection), angle and other cable entry directions shall be subject to agreement between manufacturer and purchaser. EN 50464-2-3:2007 - 6 - View as in Figure 1 Figure 2

    28、High-voltage connection via busbar system The details of the cable entry, dimension L (distance between the cable entry and the busbar connection) and other cable entry directions shall be subject to agreement between manufacturer and purchaser. 5 Low-voltage connections Low-voltage bushings shall b

    29、e in accordance with EN 50386. Dimension D, which is the minimum clearance between live parts and between live parts and earth, is indicated in Figures 3 and 4. The minimum value of D shall be 40 mm. Busbars in Figure 3 shall be dimensioned by reference to rated currents and short-circuit forces. Co

    30、nnection may be by single- or multi-core cables. Figures 3 and 4 show typical arrangements, the actual design may vary. - 7 - EN 50464-2-3:2007 Figure 3 Low-voltage connection directly to bushings The details of the cable entry, dimension L (distance between the cable entry and the bushing connectio

    31、n), angle and other cable entry directions shall be subject to agreement between manufacturer and purchaser. View as in Figure 3 Figure 4 Low-voltage connection to busbar system The arrangement of the cable entry, dimension L (distance between the cable entry and the busbar connection), angle and ot

    32、her cable entry directions shall be subject to agreement between manufacturer and purchaser. EN 50464-2-3:2007 - 8 - 6 Design Cable boxes shall be fastened on transformer covers by screws or by welding. For convenient cable access, cable boxes shall be provided with covered openings with handles. Th

    33、e protection class shall be IP33 to IP55 in accordance with EN 60529. Suitable ventilation shall be provided. The assembly of cable boxes to the transformer covers may be achieved using flanges. Means of earthing the cable box to the transformer cover shall be provided. Cable entry surfaces shall be

    34、 prepared for easy assembly. The type and quantity of cable entries shall be subject to agreement between manufacturer and purchaser. Earthing bosses for cable armour shall be provided. For single-core cable connections at the appropriate current, cable entry surfaces shall be of non-magnetising mat

    35、erial. The following cable box arrangements shall be available: a) high-voltage bushings only; b) low-voltage bushings only; c) common for high- and low-voltage bushings; d) common for high- and low-voltage bushings, with segregation between high- and low-voltage bushings. NOTE The positions of the

    36、tap-changer drive and lifting lugs, and whether they are inside or outside the cable box, should be subject to agreement between manufacturer and purchaser. 7 Test If the cable box is dimensioned according to Table 1, the cable box need not be tested with the transformer. Verification of dimensions

    37、guarantees full functionality. If dimensions have been reduced from those in Table 1 through the use of insulating barriers, separate tests with power frequency and lightning impulse voltages shall be carried out. Cable boxes may be separated from the transformer for these tests. blankBS EN 50464-2-

    38、3:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards

    39、are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this

    40、British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers automatica

    41、lly receive the latest editions of standards.Buying standardsOrders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http

    42、:/www.bsi-.In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European and international

    43、standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-.Subscribi

    44、ng members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-.Information reg

    45、arding online access to British Standards via British Standards Online can be found at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the inter

    46、national standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI.This

    47、 does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.


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