EN 50299-1-2014 en Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72 5 kV to 550 kV - Part 1 Fluid-filled cable.pdf

1、BSI Standards PublicationBS EN 50299-1:2014Oil-immersed cable connectionassemblies for transformersand reactors having highestvoltage for equipment Umfrom 72,5 kV to 550 kVPart 1: Fluid-filled cable terminationsBS EN 50299-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK imple

2、mentation of EN 50299-1:2014. Together with BS EN 50299-2:2014, it supersedes BS EN 50299:2002 which will be withdrawn on 13 October 2017.The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers.A list of organizations represented on this committee can

3、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 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 82753 2ICS 29.180Complianc

4、e 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 31 January 2015.Amendments/corrigenda issued since publicationDate Text affectedEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE

5、 NORMEN 50299-1 November 2014 ICS 29.180 Supersedes EN 50299:2002 (PART) English Version Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV - Part 1: Fluid-filled cable terminations Bote de raccordement de cble pour t

6、ransformateursimmergs et bobine dinductance de tensions comprisesentre 72,5 kV et 550 kV - Partie 1: Extrmit de cble remplie dun fluide lgefllte Kabelanschlusseinheiten fr Transformatorenund Drosselspulen mit einer hchsten Spannung frBetriebsmittel Um von 72,5 kV bis 550 kV - Teil 1: Flssigkeitsgefl

7、lte Kabelendverschlsse This European Standard was approved by CENELEC on 2014-10-13. 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 lis

8、ts 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 versions (English, French, German). A version in any other language made by translation u

9、nder 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 committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, E

10、stonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committ

11、ee for Electrotechnical Standardization Comit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC

12、 Members. Ref. No. EN 50299-1:2014 E BS EN 50299-1:2014EN 50299-1:2014 2 Contents Foreword .3 1 Scope 4 2 Normative references .4 3 Terms and definitions .5 4 Limits of supply .5 5 Rated values .5 6 Preferred values .5 6.1 Highest voltage for equipment (Um) 5 6.2 Rated currents (Ir) 6 6.3 Transforme

13、r test voltages .6 6.4 Transformer test currents .6 6.5 Cable installation test voltage .6 7 Requirements .6 7.1 Connection interface .6 7.2 Mechanical requirements .6 7.3 Dimensions .6 7.4 Protection against corrosion .7 7.5 Mechanical forces on cable terminations .7 8 Tests .7 8.1 Factory tests .7

14、 8.2 Tests after installation .7 Bibliography . 11 Figures Figure 1 Limits of supply between transformer and cable termination 8 Figure 2 Typical arrangement of cable connection assemblies 9 BS EN 50299-1:2014EN 50299-1:2014BS EN 50299-1:2014EN 50299-1:2014 2 Contents Foreword .3 1 Scope 4 2 Normati

15、ve references .4 3 Terms and definitions .5 4 Limits of supply .5 5 Rated values .5 6 Preferred values .5 6.1 Highest voltage for equipment (Um) 5 6.2 Rated currents (Ir) 6 6.3 Transformer test voltages .6 6.4 Transformer test currents .6 6.5 Cable installation test voltage .6 7 Requirements .6 7.1

16、Connection interface .6 7.2 Mechanical requirements .6 7.3 Dimensions .6 7.4 Protection against corrosion .7 7.5 Mechanical forces on cable terminations .7 8 Tests .7 8.1 Factory tests .7 8.2 Tests after installation .7 Bibliography . 11 Figures Figure 1 Limits of supply between transformer and cabl

17、e termination 8 Figure 2 Typical arrangement of cable connection assemblies 9 BS EN 50299-1:2014 3 EN 50299-1:2014 Foreword This document (EN 50299-1:2014) 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

18、national level by publication of an identical national standard or by endorsement (dop) 2015-10-13 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2017-10-13 This document partially supersedes EN 50299:2002, together with EN 50299-2:2014. Changes

19、 have been made in this document to bring it line with EN 50299-2:2014. Dimensions mentioned in EN 50299-1 are valid for fluid-filled cable terminations. Dry-type cable terminations may also fit to these requirements. A new standard EN 50299-2 is issued which describes requirements for dry-type cabl

20、e terminations only. 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. _ BS EN 50299-1:2014EN 50299-1:2014BS EN 50299-1:2014EN 50299-1:2

21、014 4 1 Scope This European Standard covers the oil-immersed single-phase connection assembly of cables for transformers and reactors, designed in accordance with EN 60076 series. NOTE In the standard the term “transformer“ is used as common definition for transformer and reactor. The purpose of EN

22、50299-1 is to establish for the cable assemblies: the electrical and mechanical requirements, including interchangeability; the limits of supply; the test to be carried out. It complements and amends, if necessary, the relevant IEC standards and applies to oil immersed cable connections, suitable fo

23、r fluid-filled or dry-type cable terminations. EN 50299-1 does not cover direct cable terminations (see 3.1.1.3), but, in this case, upon agreement between purchaser and supplier, the standard may be used for guidance except for Figure 1 and Figure 2 which are not applicable. This standard applies t

24、o oil-immersed cable connection boxes on transformers with highest voltage for equipment Um= 72,5 kV to 550 kV, including the current conductor terminal at the cable sealing end of the transformer. 2 Normative references The following documents, in whole or in part, are normatively referenced in thi

25、s document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 60076 Series Power transformers (IEC 60076 Series) EN 60296 Fluids for electrotechn

26、ical applications Unused mineral insulating oils for transformers and switchgear (IEC 60296) EN ISO 1302 Geometrical product specifications (GPS) Indication of surface texture in technical product documentation (ISO 1302) IEC 60141 Series Tests on oil-filled and gas-pressure cables and their accesso

27、ries IEC 60840 Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Um= 36 kV) up to 150 kV (Um= 170 kV) Test methods and requirements IEC 62067 Power cables with extruded insulation and their accessories for rated voltages above 150 kV (Um= 170 kV) up to 500 k

28、V (Um= 550 kV) Test methods and requirements HD 632 S2 Power cables with extruded insulation and their accessories for rated voltages above 36 kV (Um= 42 kV) up to 150 kV (Um= 170 kV) BS EN 50299-1:2014EN 50299-1:2014BS EN 50299-1:2014EN 50299-1:2014 4 1 Scope This European Standard covers the oil-i

29、mmersed single-phase connection assembly of cables for transformers and reactors, designed in accordance with EN 60076 series. NOTE In the standard the term “transformer“ is used as common definition for transformer and reactor. The purpose of EN 50299-1 is to establish for the cable assemblies: the

30、 electrical and mechanical requirements, including interchangeability; the limits of supply; the test to be carried out. It complements and amends, if necessary, the relevant IEC standards and applies to oil immersed cable connections, suitable for fluid-filled or dry-type cable terminations. EN 502

31、99-1 does not cover direct cable terminations (see 3.1.1.3), but, in this case, upon agreement between purchaser and supplier, the standard may be used for guidance except for Figure 1 and Figure 2 which are not applicable. This standard applies to oil-immersed cable connection boxes on transformers

32、 with highest voltage for equipment Um= 72,5 kV to 550 kV, including the current conductor terminal at the cable sealing end of the transformer. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.

33、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 60076 Series Power transformers (IEC 60076 Series) EN 60296 Fluids for electrotechnical applications Unused mineral insulating oils for

34、transformers and switchgear (IEC 60296) EN ISO 1302 Geometrical product specifications (GPS) Indication of surface texture in technical product documentation (ISO 1302) IEC 60141 Series Tests on oil-filled and gas-pressure cables and their accessories IEC 60840 Power cables with extruded insulation

35、and their accessories for rated voltages above 30 kV (Um= 36 kV) up to 150 kV (Um= 170 kV) Test methods and requirements IEC 62067 Power cables with extruded insulation and their accessories for rated voltages above 150 kV (Um= 170 kV) up to 500 kV (Um= 550 kV) Test methods and requirements HD 632 S

36、2 Power cables with extruded insulation and their accessories for rated voltages above 36 kV (Um= 42 kV) up to 150 kV (Um= 170 kV) BS EN 50299-1:2014 5 EN 50299-1:2014 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 cable connection assembly

37、combination of a cable termination and a cable connection box which mechanically and electrically connects the cable to the transformer 3.1.1 cable termination equipment fitted to the end of a cable to ensure electrical connection with other parts of the system and to maintain the insulation up to t

38、he point of connection 3.1.1.1 fluid-filled cable termination cable termination which includes an insulating fluid as part of the cable connection assembly and comprises a separation between said cable fluid in the cable connection box 3.1.1.2 dry-type cable termination cable termination which compr

39、ises an elastomeric electrical stress control component in intimate contact with a separating insulating barrier (insulator) between the cable insulation and the liquid insulation of the transformer cable connection box. The cable termination does not require any insulating fluid 3.1.1.3 direct cabl

40、e termination cable termination directly fitted on the end of the cable without any separating insulating barrier between the cable insulation and the insulation of the cable connection box. The cable enters directly into the cable box via a gland 3.1.2 cable connection box part of the transformer w

41、hich houses the cable termination and the interface to the transformer connection 3.1.2.1 conductor current terminal with removable link interface to the transformer with removable connection between transformer and socket which allows the transformer to be electrically separated from the cable 4 Li

42、mits of supply The limits of supply of transformer and cable termination shall be according to Figure 1. 5 Rated values The following rated values shall apply: a) highest voltage for equipment (Um); b) rated currents (Ir); c) rated short-time and peak withstand currents; d) rated duration of short-c

43、ircuit; e) test voltages and test currents for testing the transformer; f) test voltage for cable commissioning. 6 Preferred values 6.1 Highest voltage for equipment (Um) The highest voltage for equipment Umof the cable connection shall be equal to the values for the cable and the transformer and sh

44、all be selected from the following standard values: 72,5 kV 100 kV 123 kV 145 kV 170 kV 245 kV 300 kV 362 kV 420 kV 550 kV. BS EN 50299-1:2014EN 50299-1:2014BS EN 50299-1:2014EN 50299-1:2014 6 6.2 Rated currents (Ir) Sockets shall be selected with a rated current Irhigher than 1,2 times of the rated

45、 current of the transformer. They are qualified without performing additional tests or qualifications, to ensure withstand capability of overloading conditions of transformer according to IEC 60076-7. The rated current Irshall be selected from the following standard values which are 20 % higher than

46、 the rated current of the transformer: 1 000 A 1 600 A 2 000 A 2 500 A 3 150 A. Short-time and peak withstand currents as well as the duration of short circuit shall refer to the levels provided by the cable system, not exceeding the values given in IEC 60076-7 loading guide. 6.3 Transformer test vo

47、ltages Transformer test voltages shall conform to EN 60076-3. 6.4 Transformer test currents Transformer test currents shall conform to IEC 60076-7. 6.5 Cable installation test voltage The cable installation test voltage shall conform to HD 632 S2, IEC 60840 or IEC 62067. 7 Requirements 7.1 Connectio

48、n interface The current-carrying contact surfaces of the connection interface shall be either bare copper or copper silver-coated or tin-coated or silver-coated aluminium. The temperature of this interface shall not exceed the limit given in the standard for the cable for which the cable connection

49、box is designed. The connection interface is defined in Figure 2. As the maximum conductor temperature for cables is limited by the maximum operating temperature for the insulation, there are certain cable insulations which cannot withstand the maximum temperature specified for the transformer if there is heat transfer across the connection interface of the cable termination. For cases when the temperature limit given by the IEC standard cannot be achieved, t