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 4: Transformers with cable boxes on the high-voltage and/or low-voltage side Cable boxes type 2 for use on transformers meeting
2、 the requirements of EN 50588-2BS EN 50588-4:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50588-4 March 2018 ICS 29.180 Supersedes EN 50464-2-3:2007 English Version Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 4: Transformers with cable b
3、oxes on the high-voltage and/or low-voltage side - Cable boxes type 2 for use on transformers meeting the requirements of EN 50588-2 Transformateurs 50 Hz de moyenne puissance, de tension la plus leve pour le matriel ne dpassant pas 36 kV - Partie 4: Transformateurs raccords par botes cble ct haute
4、tension et/ou ct basse tension - Botes cbles de type 2 pour utilisation pour transformateurs de distribution conformes aux exigences de la EN 50588-2 Mittelleistungstransformatoren 50 Hz, mit einer hchsten Spannung fr Betriebsmittel nicht ber 36 kV - Teil 4: Verteiltransformatoren mit Kabelanschluss
5、ksten auf der Ober- und/oder Unterspannungsseite - Kabelanschlussksten Typ 2 fr Verteiltransformatoren nach EN 50588-2 This European Standard was approved by CENELEC on 2017-12-25. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
6、 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 Management Centre or to any CENELEC member. This European Standard exists in three of
7、ficial 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 electrote
8、chnical 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
9、, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-104
10、0 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50588-4:2018 E National forewordThis British Standard is the UK implementation of EN 505884:2018. It supersedes BS EN 5046423:2007, which is withdrawn.The UK participat
11、ion 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 include all the necessary provisions of a contract. Users are responsible for
12、its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 51263 6ICS 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
13、Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 505884:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50588-4 March 2018 ICS 29.180 Supersedes EN 50464-2-3:2007 English Version Medium power transformers 50 Hz, with h
14、ighest voltage for equipment not exceeding 36 kV - Part 4: Transformers with cable boxes on the high-voltage and/or low-voltage side - Cable boxes type 2 for use on transformers meeting the requirements of EN 50588-2 Transformateurs 50 Hz de moyenne puissance, de tension la plus leve pour le matriel
15、 ne dpassant pas 36 kV - Partie 4: Transformateurs raccords par botes cble ct haute tension et/ou ct basse tension - Botes cbles de type 2 pour utilisation pour transformateurs de distribution conformes aux exigences de la EN 50588-2 Mittelleistungstransformatoren 50 Hz, mit einer hchsten Spannung f
16、r Betriebsmittel nicht ber 36 kV - Teil 4: Verteiltransformatoren mit Kabelanschlussksten auf der Ober- und/oder Unterspannungsseite - Kabelanschlussksten Typ 2 fr Verteiltransformatoren nach EN 50588-2 This European Standard was approved by CENELEC on 2017-12-25. CENELEC members are bound to comply
17、 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 CEN-CENELEC M
18、anagement 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
19、the same 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, Latv
20、ia, Lithuania, 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
21、Elektrotechnische 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 50588-4:2018 E BS EN 505884:2018EN 50588-4:2018 (E) 2 Contents Page European forewor
22、d 3 1 Scope . 4 1.1 High-voltage side . 4 1.2 Low-voltage side 4 2 Normative references 4 3 Terms and definitions . 4 4 High-voltage connections 5 5 Low-voltage connections . 6 6 Design 7 7 Test 8 BS EN 505884:2018EN 50588-4:2018 (E) 3 European foreword This document (EN 50588-4:2018) has been prepa
23、red 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 publication of an identical national standard or by endorsement (dop) 2018-12-15 latest date by which the national standards conflicting with this docu
24、ment have to be withdrawn (dow) 2020-12-15 This document supersedes EN 50464-2-3:2007. The EN 50588 series consists of the following parts, under the general title “Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV”: Part 1: General requirements Part 2: Transfor
25、mers 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: Transformers with cable boxes on the high-voltage and/or low-voltage side Cable boxes type 1 for use on transformers meeting the requirements
26、 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 transformers 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. CEN
27、ELEC shall not be held responsible for identifying any or all such patent rights. BS EN 505884:2018EN 50588-4:2018 (E) 4 1 Scope Cable boxes described in this European Standard correspond to cable boxes Type 2 in EN 50588-2 and are suitable for assembly on the cover of oil-immersed distribution tran
28、sformers meeting the requirements of EN 50588-2. Cable boxes are air-filled, metal- or non-metal enclosed, for high- and/or low-voltage connections in the following variations: 1.1 High-voltage side a) Connection directly to bushings; b) Connection via busbar system. 1.2 Low-voltage side a) Connecti
29、on directly to bushings (maximum of four connectors per bushing); b) Connection via busbar system. 2 Normative references The following documents 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 edit
30、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50180, Bushings above 1 kV up to 36 kV and from 250 A to 3,15 kA for liquid filled transformers EN 50386:2002, Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled
31、 transformers EN 50588-3, Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 3: Transformers with cable boxes on the high-voltage and/or low-voltage side - Cable boxes type 1 for use on transformers meeting the requirements of EN 50588-2 EN 60076-3, Power
32、transformers - Part 3: Insulation levels, dielectric tests and external clearances in air (IEC 60076-3) EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 50588-3 appl
33、y. 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/obpapply. BS EN 505884:2018EN 50588-4:2018 (E) 5 4 High-voltage connections
34、High-voltage bushings shall preferably be in accordance with EN 50180, pollution class II. Dimension D, which is the minimum distance between live 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 in
35、sulating material. In this case, the insulation level shall be demonstrated by test. Busbars in Figure 2 shall be dimensioned by reference to rated 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 v
36、ary. Table 1 Minimum distances in the cable box UMRated short duration power frequency withstand voltage (r.m.s.) Rated lightning 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
37、 24 50 95 125 170 225 36 70 145 170 275 315 NOTE Values in the table according to EN 60076-3, Table 2 and Table 3 Figure 1 High-voltage 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 ent
38、ry directions shall be subject to agreement between manufacturer and purchaser. BS EN 505884:2018EN 50588-4:2018 (E) 6 Figure 2 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 dir
39、ections shall be subject to agreement between manufacturer and purchaser. 5 Low-voltage connections Low-voltage bushings shall be 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
40、 value of D shall be 40 mm. Busbars in Figure 3 shall be dimensioned by reference to rated currents and short-circuit forces. Connection may be by single- or multi-core cables. Figures 3 and 4 show typical arrangements, the actual design may vary. Figure 3 Low-voltage connection directly to bushings
41、 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. BS EN 505884:2018EN 50588-4:2018 (E) 7 Figure 4 Low-voltage connection to busbar system
42、 The arrangement of the cable entry, dimension L (distance between the cable entry and the busbar connection), angle and other cable entry directions shall be subject to agreement between manufacturer and purchaser. 6 Design Cable boxes shall be fastened on transformer covers by screws or by welding
43、. For convenient cable access, cable boxes shall be provided with covered openings with handles. The 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
44、of earthing the cable box to the transformer cover shall be provided. Cable entry surfaces shall be 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
45、 cable connections at the appropriate current, cable entry surfaces shall be of non-magnetising material. 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-vo
46、ltage bushings, with segregation between high- and low-voltage bushings. NOTE The positions of the 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. BS EN 505884:2018EN 50588-4:2018 (E) 8 7 Tes
47、t If the cable box is dimensioned according to Table 1, the cable box need not be tested with the transformer. Verification of dimensions guarantees full functionality. If dimensions have been reduced from those in Table 1 through the use of insulating barriers, separate tests with power frequency a
48、nd lightning impulse voltages shall be carried out. Cable boxes may be separated from the transformer for these tests. BS EN 505884:2018This page deliberately left blankEN 50588-4:2018 (E) 8 7 Test If the cable box is dimensioned according to Table 1, the cable box need not be tested with the transf
49、ormer. Verification of dimensions 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. This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information an
