Bsi bs en 50386 2010 + a1 2013

BS EN 50386:2010+A1:2013 BS EN 50386:2010 BSI Standards Publication Bushings up to kV and from 250 A to kA, for liquid filled transformers BS EN 50386:2010+A1:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50386:2010+A1:2013 It supersedes BS EN 50386:2010 which is withdrawn The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CENELEC text carry the number of the CENELEC amendment For example, text altered by CENELEC amendment A1 is indicated by  The UK participation in its preparation was entrusted to Technical Committee PEL/36, Insulators for power systems 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 application © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 82506 ICS 29.180 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2010 Amendments/corrigenda issued since publication Date Text affected 31 August 2013 Implementation of CENELEC amendment A1:2013 BS EN 50386:2010 50386:2010+A1 EN 50386 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM October 2010 August 2013 ICS 29.180 Supersedes EN 50386:2002 English version Bushings up to kV and from 250 A to kA, for liquid filled transformers Traversées jusqu'à kV et de 250 A kA, pour transformateurs remplissage de liquide Durchführungen bis kV und von 250 A bis kA für flüssigkeitsgefüllte Transformatoren This European Standard was approved by CENELEC on 2010-10-01 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 alteration 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 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, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom BS EN 50386:2010+A1:2013 EN 50386:2010+A1:2013 EN 50386:2010 BS EN 50386:2010 –2– –2– Foreword This European Standard was prepared by the Technical Committee CENELEC TC 36A, Insulated bushings It was submitted to the Unique Acceptance Procedure and was accepted by CENELEC as EN 50386 on 2010-10-01 This document supersedes EN 50386:2002 This edition, compared to EN 50386:2002, improves and facilitates the interchangeability of bushings, and improves dimensions settings for interchangeability and requirements of mechanical test Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN and CENELEC shall not be held responsible for identifying any or all such patent rights The following dates are proposed: – – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the EN have to be withdrawn -3- (dop) 2011-10-01 (dow) 2013-10-01 EN 50386:2010/A1:2013 Foreword Foreword to amendment A1 This document (EN 50386:2010/A1:2013) has been prepared by CLC/TC 36A "Insulated bushings" 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 latest date by which the national standards conflicting with this document have to be withdrawn (dop) 2014-07-01 (dow) 2016-07-01 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights –3– –3– –3– BS EN 50386:2010+A1:2013 BS EN 50386:2010 EN 50386:2010+A1:2013 EN BS 50386:2010 EN 50386:2010 EN 50386:2010 Contents Contents 1 Scope 4 1 Scope Normative references 4 2 Normative references 4 Requirements 3 Requirements 3.1  Application .4 3.1 3.2 Application .4 Standard value of rated voltage (Ur) 4 3.2 3.3 Standard values value ofofrated ratedvoltage current(U (Ir) 4 3.3 3.4 Standard values rated current (Ir) Minimum nominalofcreepage distance 4 3.4 3.5 Minimum nominal creepage distance 4 Dielectric characteristics .5 3.5 3.6 Dielectric characteristics .5 Dimensions and components 5 3.6 3.7 Dimensions andwithstand components Cantilever load test .7 Bibliography 3.8 rise����������������������������������������������������������������������������������������������������8 3.7 Temperature Cantilever load withstand test .7 Bibliography Bibliography�������������������������������������������������������������������������������������������������������������������������������������������9 Figures Figures Figure – Type - bushings (250 A to 630 A) 5 AA toto 630 A) Figure – Type 4-3 bushings (250 (1 250 000 A) 5 Figure Tables – Type - bushings (1 250 A to 000 A) Tables1 – Minimum nominal creepage distance  Table Table nominal creepage distance  – Minimum Standard dimensions – Cantilever Standard dimensions 6 Table test load test load 7 Table – Cantilever List of components Table – List of components BS EN 50386:2010+A1:2013 EN 50386:2010+A1:2013 EN 50386:2010 BS EN 50386:2010 –4– –4– Introduction The object of this European Standard is to specify the requirements and the dimensions of bushings for voltages up to 000 V and rated currents from 250 A up to 000 A for insulating liquid filled transformers Scope This European Standard is applicable to ceramic insulated bushings for rated voltages up to 000 V, rated currents from 250 A up to 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 EN 50464-1 Normative references The following referenced documents are indispensable for the application 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  60137:2008, for alternating above 00060137) V (IEC 60137:2008) EN EN 60137, InsulatedInsulated bushingsbushings for alternating voltages voltages above 000 V (IEC 3.1 Requirements Application Bushings covered by this standard shall be suitable for operation with one end partially or fully immersed in an insulating liquid and with the other end in air 3.2 Standard value of rated voltage (Ur) The rated voltage Ur is 000 V (phase to phase) When a bushing is used only partially immersed, a reduced rated voltage shall be agreed between the purchaser and the manufacturer 3.3 Standard values of rated current (Ir) The values of Ir of a bushing shall be chosen from the standard values as given below, in amperes: 250 - 630 – 250 - 000 - 150 - 000 - 000 3.4 Minimum nominal creepage distance The minimum nominal creepage distance for bushing ends intended for use in air, is given in Table Table – Minimum nominal creepage distance 250 Ir A Minimum nominal creepage distance mm a 55 (standard type) 115 (extended type) Type with extended creepage distance a 630 250 – 150 000 – 000 70 75 85 BS EN 50386:2010+A1:2013 BS EN 50386:2010 EN 50386:2010+A1:2013 EN 50386:2010 –5– –5– 3.5 Dielectric characteristics Power-frequency withstand voltage (60 s): dry and wet 10 kV Lightning impulse withstand voltage (1,2/50 µs): 20 kV When a bushing is used only partially immersed, the reduced dielectric characteristics shall be agreed between the purchaser and the manufacturer 3.6 Dimensions and components Figure and Figure show the basic construction of the bushings and the dimensions covered by this standard They not purport to show constructional details Customized bushings are subject to agreement between purchaser and manufacturer The dimensions shall be as specified in Table The list of components is given in Table d1 1 d1 14 L3 L3 13 d5 d2 10 d3 10 t d2 d3 L4 L4 L5 L2 11 L2 12 12 d6 d5 11 L1 d7 d4 Figure – Type - bushings (250 A to 630 A) NOTE Internal terminal connections are not defined in this standard NOTE This is a basic design L5 d6 t L1 d7 d4 Figure – Type - bushings (1 250 A to 000 A) 150 000 000 310 300 250 240 40 40 35 35 35 10 10 10 10 6 M64 × or b ∅ 58 M55 × M48 × M42 × M30 × M20 M12 Type with extended creepage distance 000 200 30 M12 mm d1 Plain terminations are allowed but are limited to the length l3 250 178 30 mm t max b 630 170 30 mm l2 a 250 a 138 mm A 250 l1 max Ir Types BS EN 50386:2010+A1:2013 EN 50386:2010+A1:2013 EN 50386:2010 +2 118 118 160 90 70 56 45 34 28 mm d3 160 125 104 90 70 56 56 mm d2 max 180 180 150 125 110 85 60 60 mm d4 max 110 110 90 90 70 65 30 40 mm l3 Table – Standard dimensions – – 66 –– 180 180 125 104 90 70 70 56 mm d5 max 135 129 100 85 68 56 43 43 mm d6 max 115 115 87 68 54 43 33 27 mm d7 max 140 135 120 120 95 80 70 70 mm l4 max 110 87 75 72 62 82 70 70 mm l5 max BS EN 50386:2010+A1:2013 BS EN 50386:2010 EN 50386:2010+A1:2013 EN 50386:2010 –7– –7– 3.7 Cantilever load withstand test For all test methods and procedures, refer to EN 60137 Table – Cantilever test load Types Ir A F N Cantilever Test load 250 400 250 630 500 250 600 000 000 150 600 000 600 000 600 a a 400 Type with extended creepage distance These are only test values for type testing and can not be considered for operating load The connection of the bushings has to be mechanical stress relive Table – List of components Designation Item Terminal stud Remarks Types - 3: Brass Types - 8: Copper If brass is used for types - or if aluminium-alloy for all types the rated current Ir shall be reduced subject to an agreement Conductor Formed as terminal stud, busbar or flange Nut Pressure plate Pressure plate Ceramic body Insulation body Gasket insulating liquid resistant material Gasket Only for types – 8, insulating liquid resistant material 10 Gasket insulating liquid resistant material 11 Packing Only necessary if material of insulation body item is ceramic 12 Packing Only necessary if material of insulation body item is ceramic 13 Washer Only for types - 14 Spring washer Only for types - Only for types – Replace the reference by the following: BS EN 50386:2010+A1:2013 EN 60137:2008, Insulated bushings for alternating voltages above 000 V (IEC 60137:2008) –8– EN 50386:2010+A1:2013 Add the following after 3.7  3.8 Temperature rise Bushings Ir < 150 A shall be in accordance with the maximal temperature rise given in EN 60137:2008, Table Bushings Ir ≥ 150 A: the maximum temperature rise is K more than the figures stated in EN 60137:2008, Table Test results will be influenced by test method and external connection arrangement; these will be agreed between purchaser and supplier  BS EN 50386:2010 EN 50386:2010 BS EN 50386:2010+A1:2013 EN 50386:2010+A1:2013 –9– –8– Bibliography EN 50464-1, Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 500 kVA with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements EN 62155, Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 000 V (IEC 62155) 1) IEC Guide 109 and CENELEC TC 111X document , Environmental aspects - Inclusion in electrotechnical product standards NOTE It is highly recommended to minimize the impact of bushings on the environment during all phases of their life (including manufacturing, operation during service life, dismantling after their end of life and disposal or recycling) IEC Guide109 and document by CENELEC TC 111X ¹) “Environmental standardization for electrical and electronic products and systems” after finalization can be used as helpful reference 1) Under development This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About 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