EN 50299-2-2014 en Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72 5 kV to 550 kV - Part 2 Dry-type cable ter.pdf

1、BSI Standards PublicationBS EN 50299-2:2014Oil-immersed cable connectionassemblies for transformersand reactors having highestvoltage for equipment Umfrom 72,5 kV to 550 kVPart 2: Dry-type cable terminationsBS EN 50299-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implement

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 Together with BS EN 50299-1:2014, it supersedes BS EN 50299:2002 which will be withdrawn on 13 October 2017.The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers.A list of organizations represented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

3、btained 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 82754 9ICS 29.180Compliance wi

4、th 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 affectedBS EN 50299-2:2014EUROPEAN STANDARD NORME EURO

5、PENNE EUROPISCHE NORM EN 50299-2 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 2: Dry-type cable terminations Bote de raccordement d

6、e cble pour transformateurs immergs et bobine dinductance de tensions comprises entre 72,5 kV et 550 kV - Partie 2: Extrmit de cble sche lgefllte Kabelanschlusseinheiten mit Kompaktkabelanschlssen fr Transformatoren und Drosselspulen mit einer hchsten Spannung fr Betriebsmittel Um von 72,5 kV bis 55

7、0 kV - Teil 2: Kompaktkabelanschlsse 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.

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

9、 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 committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Repub

10、lic, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. E

11、uropean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches 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 world

12、wide for CENELEC Members. Ref. No. EN 50299-2:2014 E BS EN 50299-2:2014EN 50299-2:2014 - 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 .6 6.1 Highest voltage for equipment (Um) 6 6.2 Rated currents (

13、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 Isolation of transformer during cable installation tests .6 7.2 Connection interface .6 7.3 Mechanical requirements .6 7.4 Shielding electrode .7 7.5 Insulating liquid

14、s .7 7.6 Dimensions .7 7.7 Protection against corrosion .7 7.8 Measuring tap .7 7.9 Earthing 7 7.10 Sealing cap .7 7.11 Dummy plug7 7.12 Material compatibility 8 8 Tests .8 8.1 General .8 8.2 Tests on sockets .8 8.3 Factory tests on the transformer.8 8.4 Tests after installation of the cable system

15、9 Annex A (informative) 13 Dielectric tests on sockets . 13 A.1 General 13 A.2 Type approval tests . 13 A.3 Routine tests 13 Bibliography . 14 Figures Figure 1 Limits of supply between transformer and dry-type cable termination . 10 Figure 2 Typical arrangement of cable connection assemblies . 11 BS

16、 EN 50299-2:2014EN 50299-2:2014BS EN 50299-2:2014EN 50299-2:2014 - 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 .6 6.1 Highest voltage for equipment (Um) 6 6.2 Rated currents (Ir) 6 6.3 Transformer

17、test voltages .6 6.4 Transformer test currents .6 6.5 Cable installation test voltage .6 7 Requirements .6 7.1 Isolation of transformer during cable installation tests .6 7.2 Connection interface .6 7.3 Mechanical requirements .6 7.4 Shielding electrode .7 7.5 Insulating liquids .7 7.6 Dimensions .7

18、 7.7 Protection against corrosion .7 7.8 Measuring tap .7 7.9 Earthing 7 7.10 Sealing cap .7 7.11 Dummy plug7 7.12 Material compatibility 8 8 Tests .8 8.1 General .8 8.2 Tests on sockets .8 8.3 Factory tests on the transformer.8 8.4 Tests after installation of the cable system 9 Annex A (informative

19、) 13 Dielectric tests on sockets . 13 A.1 General 13 A.2 Type approval tests . 13 A.3 Routine tests 13 Bibliography . 14 Figures Figure 1 Limits of supply between transformer and dry-type cable termination . 10 Figure 2 Typical arrangement of cable connection assemblies . 11 BS EN 50299-2:2014- 3 -

20、EN 50299-2:2014 Foreword This document (EN 50299-2:2014) 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 national level by publication of an identical national standard or by endorsement (dop) 2015-10-13

21、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 50299-1:2014. The new standard EN 50299-2 is issued which describes requirements for dry-type cable terminations only. D

22、imensions mentioned in EN 50299-1 are valid for fluid-filled cable terminations. Dry-type cable terminations may also fit to these requirements. _ BS EN 50299-2:2014EN 50299-2:2014BS EN 50299-2:2014EN 50299-2:2014 - 4 - 1 Scope This European Standard covers the oil-immersed single-phase connection a

23、ssemblies of cables for transformers and reactors designed in accordance with EN 60076 series. NOTE The term “transformer“ is used as common definition for transformer and reactor. If no separate cable connection box is used and dry-type cable terminations are directly installed into the transformer

24、 tank the requirements of this standard should be followed. The purpose of EN 50299-2 is to establish for the cable connection assemblies: electrical and mechanical requirements including interchangeability; limits of supply; tests to be carried out. It complements and amends, if necessary, the rele

25、vant standards and applies to dry-type cable terminations for power cables with extruded insulation which may be used with similar interfaces for the cable entrance in switchgear applications according to EN 62271-209. This standard applies to oil-filled cable connection boxes of transformers with h

26、ighest voltage for equipment from Um= 72,5 kV to 550 kV, including the conductor current terminal with removable link between the transformer and the dry-type cable termination. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are i

27、ndispensable 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 60076-3:2013 Power transformers Part 3: Insulatio

28、n levels, dielectric tests and external clearances in air (IEC 60076-3:2013) EN 60296 Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgear (IEC 60296) EN 60422 Mineral insulating oils in electrical equipment Supervision and maintenance guidance (IEC

29、 60422) EN 60529 Degrees of protection provided by enclosures (IP code) (IEC 60529) EN 61099 Insulating liquids Specifications for unused synthetic organic esters for electrical purposes (IEC 61099) EN ISO 1302 Geometrical product specifications (GPS) Indication of surface texture in technical produ

30、ct documentation (ISO 1302) IEC 60076-7 Power transformers Part 7: Loading guide for oil-immersed power transformers 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 Powe

31、r 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 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 E

32、N 50299-2:2014EN 50299-2:2014BS EN 50299-2:2014EN 50299-2:2014 - 4 - 1 Scope This European Standard covers the oil-immersed single-phase connection assemblies of cables for transformers and reactors designed in accordance with EN 60076 series. NOTE The term “transformer“ is used as common definition

33、 for transformer and reactor. If no separate cable connection box is used and dry-type cable terminations are directly installed into the transformer tank the requirements of this standard should be followed. The purpose of EN 50299-2 is to establish for the cable connection assemblies: electrical a

34、nd mechanical requirements including interchangeability; limits of supply; tests to be carried out. It complements and amends, if necessary, the relevant standards and applies to dry-type cable terminations for power cables with extruded insulation which may be used with similar interfaces for the c

35、able entrance in switchgear applications according to EN 62271-209. This standard applies to oil-filled cable connection boxes of transformers with highest voltage for equipment from Um= 72,5 kV to 550 kV, including the conductor current terminal with removable link between the transformer and the d

36、ry-type cable termination. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced do

37、cument (including any amendments) applies. EN 60076 Series Power transformers (IEC 60076 Series) EN 60076-3:2013 Power transformers Part 3: Insulation levels, dielectric tests and external clearances in air (IEC 60076-3:2013) EN 60296 Fluids for electrotechnical applications Unused mineral insulatin

38、g oils for transformers and switchgear (IEC 60296) EN 60422 Mineral insulating oils in electrical equipment Supervision and maintenance guidance (IEC 60422) EN 60529 Degrees of protection provided by enclosures (IP code) (IEC 60529) EN 61099 Insulating liquids Specifications for unused synthetic org

39、anic esters for electrical purposes (IEC 61099) EN ISO 1302 Geometrical product specifications (GPS) Indication of surface texture in technical product documentation (ISO 1302) IEC 60076-7 Power transformers Part 7: Loading guide for oil-immersed power transformers IEC 60840 Power cables with extrud

40、ed 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 kV (Um= 550 kV) Test methods and require

41、ments 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 50299-2:2014- 5 - EN 50299-2:2014 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 cable con

42、nection assembly combination of a dry-type cable termination and a cable connection box which mechanically and electrically connects the cable to the transformer 3.1.1 dry-type cable termination cable termination which comprises an elastomeric electrical stress control component in intimate contact

43、with a separating insulation barrier (insulator or socket) between the extruded cable insulation and the liquid insulation of the transformer cable connection box. The cable termination does not require any insulating fluid 3.1.1.1 socket part to be installed in the cable connection box to plug the

44、cable connector. Insulating barrier (socket) between cable connector and the insulating fluid of the cable connection box enabling the mechanical and electrical connection to the transformer 3.1.1.2 plug-in cable connector equipment fitted to the end of a cable to ensure in combination with the sock

45、et an electrical connection to the transformer 3.1.1.3 dummy plug insulating device for voltage proof sealing of the socket 3.1.1.4 sealing cap for protection of the socket against environmental conditions 3.1.2 cable connection box part of the transformer which houses the dry-type cable termination

46、 and the conductor current terminal with removable link 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 Limits of supply The limits

47、of supply between the transformer and the dry-type cable termination are defined in Figure 1. The manufacturer of the dry-type cable termination supplies the parts inside of the dotted line. The manufacturer of the transformer supplies the other components. Typically, the socket will be installed in

48、 the cable connection box by the transformer manufacturer. For details refer to table of Figure 1. 5 Rated values When dimensioning the cable connection assembly the following rated values shall apply: a) highest voltage for equipment (Um); b) rated currents (Ir); c) rated short-time and peak withst

49、and currents; d) rated duration of short circuit; e) test voltages and test currents for testing the transformer; f) test voltage for cable commissioning. BS EN 50299-2:2014EN 50299-2:2014BS EN 50299-2:2014EN 50299-2:2014 - 6 - 6 Preferred values 6.1 Highest voltage for equipment (Um) The highest voltage for equipment Umof the dry-type cable termination shall be equal to the values for the cable and the transformer and shall be selected from the following standard values: 72,5 kV 100 kV 123 kV