EN 50588-2-2018 Medium power transformers 50 Hz with highest voltage for equipment not exceeding 36 kV - Part 2 Transformers with cable boxes on the high-voltag.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kVPart 2: Transformers with cable boxes on the high-voltage and/or low-voltage side - General requirements for transformers with rated

2、 power less than or equal to 3 150 kVABS EN 50588-2:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 50588-2March 2018ICS 29.180 Supersedes EN 50464-2-1:2007English VersionMedium power transformers 50 Hz, with highest voltage forequipment not exceeding 36 kV - Part 2: Transformers withcable box

3、es on the high-voltage and/or low-voltage side -General requirements for transformers with rated power lessthan or equal to 3 150 kVATransformateurs 50 Hz de moyenne puissance, de tension la plus leve pour le matriel ne dpassant pas 36 kV -Partie 2: Transformateurs raccords par botes cble ct haute t

4、ension et/ou ct basse tension - Prescriptionsgnrales pour les transformateurs avec une puissance gale ou infrieure 3150kVAMittelleistungstransformatoren 50 Hz, mit einer hchsten Spannung fr Betriebsmittel nicht ber 36 kV - Teil 2:Verteiltransformatoren mit Kabelanschlussksten auf derOber- und/oder U

5、nterspannungsseite -Allgemeine Anforderungen fr Transformatoren mitBemessungsleistungen bis einschliesslich 3150 kVAThis European Standard was approved by CENELEC on 2017-12-25. CENELEC members are bound to comply with the CEN/CENELECInternal Regulations which stipulate the conditions for giving thi

6、s European Standard the status of a national standard without anyalteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.This European Standard exists in three official

7、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 CEN-CENELEC Management Centre has the same status as the official versions.CENELEC members are the national electrotechnical

8、committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia,

9、Slovakia, Slovenia, Spain, Sweden,Switzerland, Turkey and the United Kingdom.European Committee for Electrotechnical StandardizationComit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische NormungCEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018

10、 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.Ref. No. EN 50588-2:2018 ENational forewordThis British Standard is the UK implementation of EN 505882:2018. It supersedes BS EN 5046421:2007, which is withdrawn.The UK participation in its prepar

11、ation 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 include all the necessary provisions of a contract. Users are responsible for its correct appli

12、cation. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 51261 2ICS 29.180Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committ

13、ee on 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 505882:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50588-2 March 2018 ICS 29.180 Supersedes EN 50464-2-1:2007 English Version Medium power transformers 50 Hz, with highest voltage f

14、or equipment not exceeding 36 kV - Part 2: Transformers with cable boxes on the high-voltage and/or low-voltage side - General requirements for transformers with rated power less than or equal to 3 150 kVA Transformateurs 50 Hz de moyenne puissance, de tension la plus leve pour le matriel ne dpassan

15、t pas 36 kV - Partie 2: Transformateurs raccords par botes cble ct haute tension et/ou ct basse tension - Prescriptions gnrales pour les transformateurs avec une puissance gale ou infrieure 3150kVA Mittelleistungstransformatoren 50 Hz, mit einer hchsten Spannung fr Betriebsmittel nicht ber 36 kV - T

16、eil 2: Verteiltransformatoren mit Kabelanschlussksten auf der Ober- und/oder Unterspannungsseite -Allgemeine Anforderungen fr Transformatoren mit Bemessungsleistungen bis einschliesslich 3150 kVA This European Standard was approved by CENELEC on 2017-12-25. CENELEC members are bound to comply with t

17、he 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 CEN-CENELEC Manageme

18、nt Centre 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 CEN-CENELEC Management Centre has the sam

19、e status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit

20、huania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektro

21、technische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50588-2:2018 E BS EN 505882:2018EN 50588-2:2018 (E) 2 Contents Page European foreword 3 Int

22、roduction . 4 1 Scope . 5 2 Normative References 5 3 Terms and Definitions . 5 4 Electrical characteristics . 6 5 Design characteristics . 6 5.1 Type of oil preservation and degree of sealing . 6 5.2 Terminal markings . 6 5.3 Provision for cable box Type 1 connections 6 5.4 Provision for cable box T

23、ype 2 . 6 6 Transformer requirements. 6 6.1 Transformers with cable boxes, mounted on both sides 6 6.2 Transformers with cable boxes, cover mounted 7 6.3 Unit substation transformer, with cable boxes mounted on the same side . 7 6.4 Unit substation transformer with flange boxes, cover mounted 7 7 Di

24、stance between bushings . 8 8 Tests 8 BS EN 505882:2018EN 50588-2:2018 (E) 3 European foreword This document (EN 50588-2:2018) has been prepared by CLC/TC 14, “Power Transformers”. The following dates are fixed: latest date by which this document has to be implemented at national level by publicatio

25、n of an identical national standard or by endorsement (dop) 2018-12-25 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2020-12-25 This document supersedes EN 50464-2-1:2007. The EN 50588 series consists of the following parts, under the general t

26、itle “Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV”: Part 1: General requirements Part 2: Transformers with cable boxes on the high-voltage and/or low-voltage side General requirements for transformers with rated power less than or equal to 3150kVA Part 3:

27、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 50588-2 Part 4: Transformers with cable boxes on the high-voltage and/or low-voltage side Cable boxes type 2 for use on distribution transf

28、ormers meeting the requirements of EN 50588-2 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. BS EN 505882:2018EN 50588-2:2018 (E) 4 Introduction

29、 EN 50588-1:2017, 10.1.3 states that a medium power transformer could have different termination features. The following constructional situations are possible. i) Termination in open type (oil-air) bushings without protection. This is covered by EN 50588-1, EN 50180, EN 50386 and EN 50387. ii) Term

30、ination in plug-in type bushings of inside or outside cone type. This is covered by EN 50588-1 and EN 50180. iii) Termination in air filled or compound filled cable boxes or protective enclosure using open type and/or oil/compound oil-oil bushings, as defined in EN 50588-3. iv) Flange boxes and simi

31、lar solutions using open type bushings can also be used. BS EN 505882:2018EN 50588-2:2018 (E) 5 1 Scope EN 50588-2 covers, in conjunction with EN 50588-1, transformers under iii) and iv) above, up to 36 kV (the data from 24 kV to 36 kV are under consideration) and for transformers with rated power l

32、ess than or equal to 3150kVA . Further documents exist which may be used by agreement between purchaser and manufacturer for cable boxes and enclosures. The dimensional requirements for cable boxes and protective enclosures are not enclosed in this document. 2 Normative references The following docu

33、ments are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50588-1:2017

34、, Medium power transformers 50Hz, with highest voltage for equipment not exceeding 36 kV part 1: General requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. Requirements for transformers in the scope of this document shall be classified

35、according to the following definitions: ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 3.1 transformers with cable boxes,

36、side mounted transformer with electrical characteristics in the scope of this document, with facings on the transformer tank side for provision of cable boxes Type 1. These facings shall be on opposite sides of the transformer (see Figure 1) 3.2 transformers with cable boxes or similar, cover mounte

37、d transformer with electrical characteristics in the scope of this document, with terminations mounted on the tank cover. The terminations exit in such a way as to provide for cables on opposite sides of the transformer. The type of termination can be either cable box Type 1 or cable box Type 2 (as

38、per Figures 3 or 4) 3.3 unit substation transformer, side mounted transformer with electrical characteristics in the scope of this document, having facings on the transformer tank side for provision of HV switchgear and LV equipment. These facings shall be on the same side of the transformer (as per

39、 Figure 2) 3.4 unit substation transformer, cover mounted transformer with electrical characteristics in the scope of this document, with terminations mounted on the tank cover and enclosed in a flange box. Figure 5 shows a typical arrangement, however, dimension should be agreed between manufacture

40、r and purchaser 3.5 cable boxes, Type 1 metallic box designed for receiving and protecting the ends of HV or LV cables so that the cable dielectric may be effectively sealed against moisture damage. A minimum protection of IP54 is required. These boxes are not specified in this section. A higher pro

41、tection, IP65, may be necessary to satisfy termination requirements BS EN 505882:2018EN 50588-2:2018 (E) 6 3.6 cable boxes, Type 2 metallic or non metallic enclosure designed to prevent accidental contact with live parts. The enclosure can be common to HV and LV terminations or be independent for HV

42、 and LV. A protection between IP33 and IP55 is required and is subject to agreement between manufacturer and purchaser 3.7 flange box enclosure designed to provide flanges for mounting ancillary equipment on opposite sides of the transformer as per Figures 5 and 6. The box is mounted on the cover of

43、 the transformer. The IP rating is dependent on the mounted equipment and is subject to agreement between manufacturer and purchaser 4 Electrical characteristics These shall comply with EN 50588-1:2017, Clauses 5 and 6. 5 Design characteristics 5.1 Type of oil preservation and degree of sealing Thes

44、e shall comply with EN 50588-1:2017, 10.1.1. 5.2 Terminal markings These shall comply with EN 50588-1:2017, 10.1.2. 5.3 Provision for cable box Type 1 connections Facings shall be provided for mounting HV and LV bushing assemblies and cable boxes, as detailed in Figures 1, 2 and 3 of this document.

45、Fixing methods shall be provided on transformer facings positioned as defined on the appropriate drawings given in Figures 1, 2, and 3. 5.4 Provision for cable box Type 2 Facings shall be provided for mounting HV and LV bushings assemblies with cable box Type 2 as shown in Figures 4 and 5. The use o

46、f independent HV and LV enclosures shall be subject to agreement between manufacturer and purchaser. 6 Transformer requirements 6.1 Transformers with cable boxes, mounted on both sides Limiting dimensions are indicated in Figure 1. The underbase is generally in the form of skids, provided with axle

47、holes. Four jacking lugs shall be provided, if specified by the purchaser. Two lifting fittings shall be provided of adequate section. These shall be positioned to facilitate lifting in a reasonably upright position, taking into account the cable box weight. These weights to be given by the purchase

48、r if necessary. Unless otherwise stated, cable boxes Type 1 as defined in 3.5 shall be fitted to the high voltage facing and a bushing assembly shall be fitted to the low voltage facing. The termination of the low voltage shall be specified by purchaser at time of enquiry. BS EN 505882:2018EN 50588-

49、2:2018 (E) 7 Other accessories shall comply with EN 50588-1:2017, Clause 11 and shall preferably be mounted on one end of the tank and shall not be obstructed by coolers Unless otherwise agreed, two earthing terminals shall be fitted on the centre line, one below each connection facing, with the connection hole placed on the lower part of the tank. 6.2 Transformers with cable boxes, cover mounted 6.2.1 General There are no limiting dimensions. The accessories shall comply with Clause 11 of