EN 50397-2-2009 en Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV AC and not exceeding 36 kV AC - Part 2 Accessories for covered co.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationCovered conductors for overheadlines and the related accessoriesfor rated voltages above 1 kV ACand not exceeding 36 kV AC Part 2: Accessories for covered conductors Tests and ac

2、ceptance criteriaBS EN 50397-2:2009National forewordThis British Standard is the UK implementation of EN 50397-2:2009.The UK participation in its preparation was entrusted by Technical CommitteeGEL/20, Electric cables, to Subcommittee GEL/20/11, Cable accessories.A list of organizations represented

3、on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 56671 4ICS 29.240.20Compliance with a British Standard cannot confer immunity

4、 fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 January 2010Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50397-2:2009EUROPEAN STANDARD EN 50397-2 NORME EUROPENNE EUROPISCHE NORM

5、October 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any mean

6、s reserved worldwide for CENELEC members. Ref. No. EN 50397-2:2009 E ICS 29.240.20 English version Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV AC and not exceeding 36 kV AC - Part 2: Accessories for covered conductors - Tests and acceptance criteri

7、a Conducteurs gains pour lignes ariennes et accessoires associs pour des tensions assignes suprieures 1 kV c.a. et ne dpassant pas 36 kV c.a - Partie 2: Accessoires pour conducteurs gains - Exigences et essais Kunststoffumhllte Leiter und zugehrige Armaturen fr Freileitungen mit Nennspannungen ber 1

8、 kV und nicht mehr als 36 kV Wechselspannung - Teil 2: Armaturen fr kunststoffumhllte Freileitungsseile - Prfungen und Anforderungen This European Standard was approved by CENELEC on 2009-04-22. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi

9、ons 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 thre

10、e 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 electrotechnica

11、l committees of Austria, Belgium, Bulgaria, 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 t

12、he United Kingdom. BS EN 50397-2:2009EN 50397-2:2009 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50397-2 on 2009-04-22. The following dates were fixe

13、d: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-05-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-05-01 EN 50397 consists of two parts: Part 1

14、“Covered Conductors“ and Part 2 “Accessories“. It covers the construction, performance and test acceptance criteria for covered conductors for overhead lines having a nominal voltage above 1 kV a.c. up to and including 36 kV a.c., and for the related accessories. This European Standard EN 50397-2 co

15、vers the accessories. NOTE It has been assumed in the preparation of this document that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced. WARNING This European Standard calls for the use of substances and/or proce

16、dures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. _ BS EN 50397-2:2009 3 EN 50397-2:2009 Contents Introduction. 5 1 Scope . 6 2 Normativ

17、e references . 6 3 Terms and definitions . 6 4 Requirements . 8 4.1 General requirements 8 4.2 Specific requirements for fittings used on covered conductor 8 4.3 Marking . 10 5 Quality assurance . 10 6 Classification of tests Type tests, sample tests, routine tests . 10 6.1 Type tests . 10 6.2 Sampl

18、e tests . 11 6.3 Routine tests . 11 7 Tests 11 7.1 Visual examination 12 7.2 Dimensional and material verification 12 7.3 Test for permanent marking . 12 7.4 Mechanical tests . 12 7.5 Hot dip galvanizing test . 31 7.6 Water tightness test for IPC . 31 7.7 Electrical ageing test for connectors 32 7.8

19、 Short-circuit test on APD or EPD . 32 7.9 Power arc test . 33 7.10 Environmental test for suspension and tension clamps 34 7.11 Environmental tests for connectors 36 Annex A (normative) Type tests, sample tests and routine tests 39 Annex B (informative) Example of sampling with inspection by attrib

20、utes 40 Annex C (informative) Example of sampling with inspection by variable 41 Bibliography 42 BS EN 50397-2:2009EN 50397-2:2009 4 Figures Figures 1 - Test arrangement for damage and failure load test . 14 Figures 2 - Test arrangement of slip test at ambient temperature 15 Figures 3 - Slip test ar

21、rangement at low temperature 17 Figure 4 - Lift and side load test 20 Figure 5 - Tensile test arrangement 22 Figure 6 - Arrangement for the low temperature zone . 23 Figure 7 - Test arrangement . 29 Figure 8 - Mechanical stresses on earth parking device 31 Figure 9 - Test arrangement for water tight

22、ness test . 32 Figure 10 - Resistance measurement 33 Figure 11 - Example of power arc test arrangement for arc protection system . 34 Tables Table 1 - Specified minimum loads . 19 Table A.1 39 BS EN 50397-2:2009 5 EN 50397-2:2009 Introduction Covered conductors consist of a conductor surrounded by a

23、 covering made of insulating material as protection against accidental contacts with other covered conductors and with grounded parts such as tree branches, etc. In comparison with insulated conductors, this covering has reduced properties, but is able to withstand the phase-to-earth voltage tempora

24、rily. Since covered conductors are unscreened, they are not touch-proof, i.e. they must be treated as bare conductors with respect to electric shock. EN 50397-2 does not cover aspects related to the installation of overhead lines such as determination of clearances, spans, sags, etc. BS EN 50397-2:2

25、009EN 50397-2:2009 6 1 Scope This Part 2 of EN 50397 contains the requirements for accessories that are for use with the covered conductors in accordance with EN 50397-1. They are for applications in overhead lines with rated voltages U above 1 kV a.c. and not exceeding 36 kV a.c. NOTE This European

26、 Standard describes the requirements and tests only for the accessories installed on the covered conductor itself. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refer

27、ences, the latest edition of the referenced document (including any amendments) applies. EN 50397-1:2006 Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 1: Covered conductors EN 50483-5 Test requirements for low

28、 voltage aerial bundled cable accessories - Part 5: Electrical ageing test EN 50483-6:2009 Test requirements for low voltage aerial bundled cable accessories - Part 6: Environmental testing EN 61284:1997 Overhead lines - Requirements and tests for fittings (IEC 61284:1997) EN 61467 Insulators for ov

29、erhead lines - Insulator strings and sets for lines with a nominal voltage greater than 1 000 V - AC power arc tests (IEC 61467) EN ISO 1461 Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods (ISO 1461) IEC 60050-461 International Electrotechnical Voc

30、abulary (IEV) - Part 461: Electric cables ISO 2859-1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 2859-2 Sampling procedures for inspection by attributes - Part 2: Sampling plans indexed by limitin

31、g quality (LQ) for isolated lot inspection ISO 3951 series Sampling procedures for inspection by variables 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 type tests (symbol T) tests required to be made before supplying a type of product cove

32、red by this EN on a general commercial basis in order to demonstrate satisfactory performance characteristics to meet the intended application NOTE These tests are of such nature that, after they have been made, they need not be repeated unless changes are made in the material, design or manufacturi

33、ng process, which might change the performance characteristics. 3.2 sample tests (symbol S) tests made on samples of completed product or components taken from the completed product adequate to verify, that the finished product meets the design specifications BS EN 50397-2:2009 7 EN 50397-2:2009 3.3

34、 routine tests (symbol R) tests intended to prove conformance of fittings to specific requirements and made on every fitting 3.4 rated voltage the reference voltage (U), for which it is designed and which serves to define the electrical tests NOTE The rated voltage is expressed by the value U expres

35、sed in kV, where U is the r.m.s. value between any two phase conductors. 3.5 ambient temperature the temperature from 15 C to 30 C 3.6 factory-formed helical conductor fitting fitting consisting of helically formed wires which provide the force necessary to grip the conductor by self-tightening 3.7

36、tension clamp device which firmly attaches a covered conductor to a support and is designed to transmit the specified mechanical tension in the conductor to the supporting structure IEV 461-18-01 modified 3.8 tension joints mid-span sleeve designed to joint two lengths of tensioned conductor 3.9 non

37、-tension joints sleeve designed to joint two lengths of non tensioned conductor 3.10 suspension clamp device which attaches a covered conductor to a support in order to carry its weight and any specified load IEV 461-18-02 modified 3.11 top clamp device to clamp the covered conductor on the top of a

38、 pin or line post insulator in order to carry its weight and any specified load 3.12 terminals metallic device to connect a covered conductor to an electrical equipment 3.13 branch connector metallic device for connecting a branch conductor to a main conductor at an intermediate point on the latter

39、IEV 461-17-05 BS EN 50397-2:2009EN 50397-2:2009 8 3.14 arc protection devices (APD) metallic device installed on the conductor or on accessories to protect the conductor against the possible arcs 3.15 arc protection system assembly of arc protection devices, insulators and conductor, including all n

40、eeded accessories 3.16 earth parking devices (EPD) device installed on the conductor to allow temporary earthing 3.17 specified minimum slip load (SMSL) minimum load specified by the purchaser or declared by the supplier at which slippage will not take place 3.18 specified minimum failure load (SMFL

41、) minimum load specified by the purchaser or declared by the supplier at which mechanical failure will not take place NOTE From the probabilistic point of view, the specified minimum failure load corresponds to the value having the probability of e % in the distribution function of the strength of t

42、he fitting. The exclusion limit e % is usually taken within 2 % to 5 % with 10 % being the upper limit (see IEC 60826). 3.19 specified minimum mechanical damage failure load (SMMDL) minimum load specified by the purchaser or declared by the supplier at which unacceptable deformation will not take pl

43、ace 3.20 rated tensile strength (RTS) estimate of the conductor breaking load calculated using the specified tensile properties of the components wires (see EN 50397-1, 4.2.1) 3.21 minimum breaking load (MBL) minimum breaking load of the conductor given by the manufacturer if not defined in EN 50397

44、-1 4 Requirements 4.1 General requirements General requirements shall be according to EN 61284, 4.1. 4.2 Specific requirements for fittings used on covered conductor The piercing part or element of any accessories shall not decrease the mechanical strength of the conductor below than 90 % of the rat

45、ed tensile strength (RTS) of the conductor. They can be watertight or not. If they are watertight, they shall prevent moisture ingress in the conductor. The water tightness shall be tested according to 7.8. BS EN 50397-2:2009 9 EN 50397-2:2009 4.2.1 Tension clamps For the purpose of terminating cove

46、red conductors over the covering fitting shall include, but are not limited to, the following: - cone, bolted or wedge type clamp; - preformed helical fittings. The fittings shall be able to withstand the specific minimum failure load (SMFL) and shall not damage the covering and shall be designed to

47、 prevent the ingress of moisture during service. NOTE “shall not damage the covering” means no damage shall occur which could affect the correct function of the covering. 4.2.2 Suspension and top clamps Fittings for the purpose of suspension over the covering include, but are not limited to the foll

48、owing: - top-clamps; - pre-formed helical fittings; - suspension clamp according to EN 61284, 11.4. The fittings shall not damage the covering and shall be designed to prevent the ingress of moisture during service. NOTE “shall not damage the covering” means no damage shall occur which could affect

49、the correct function of the covering. The suspension clamps shall be so designed that the effects of vibration, both on the covered conductor and on the clamps themselves, are minimised. The clamps shall be designed to avoid localized pressure or damage to the covered conductor. If needed the suspension clamps shall have sufficient current carrying capability to avoid damage by fault currents. The wear resistance of the articulation assembly shall be sufficient to prevent deterioration in service.