BS EN 50397-2-2009 Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV AC and not exceeding 36 kV AC - Accessories for covered conductor.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 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolled Copy, (c) BSINational forewordThis British Standard is the UK implementation of EN 50397-2:2009.The UK participation in its preparation was entrusted by Technical CommitteeGEL/20,

3、 Electric cables, to Subcommittee GEL/20/11, Cable accessories.A list of organizations represented 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. B

4、SI 2010ISBN 978 0 580 56671 4ICS 29.240.20Compliance with a British Standard cannot confer immunity 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 affe

5、ctedBRITISH STANDARDBS EN 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 50397-2 NORME EUROPENNE EUROPISCHE NORM October 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalis

6、ation 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 means reserved worldwide for CENELEC members. Ref. No. EN 50397-2:2009 E ICS 29.240.20 English version Cov

7、ered 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 criteria Conducteurs gains pour lignes ariennes et accessoires associs pour des tensions assignes suprieures

8、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 kV und nicht mehr als 36 kV Wechselspannung - Teil 2: Armaturen fr kunststoffumhllte Freileitungsseil

9、e - 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 conditions for giving this European Standard the status of a national standard without any alteration. Up-to-

10、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 und

11、er 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, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Fra

12、nce, 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 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010

13、 03:17, Uncontrolled Copy, (c) BSIEN 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 fixed:

14、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 “Co

15、vered 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 cover

16、s 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 procedur

17、es 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 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:

18、17, Uncontrolled Copy, (c) BSI 3 EN 50397-2:2009 Contents Introduction. 5 1 Scope . 6 2 Normative 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 Cl

19、assification of tests Type tests, sample tests, routine tests . 10 6.1 Type tests . 10 6.2 Sample 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

20、test . 31 7.6 Water tightness test for IPC . 31 7.7 Electrical ageing test for connectors 32 7.8 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, sampl

21、e tests and routine tests 39 Annex B (informative) Example of sampling with inspection by attributes 40 Annex C (informative) Example of sampling with inspection by variable 41 Bibliography 42 BS EN 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolled Cop

22、y, (c) BSIEN 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 arrangement at low temperature 17 Figure 4 - Lift and side load test 20 Figure 5 - Tensile test arrangement

23、 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 tightness test . 32 Figure 10 - Resistance measurement 33 Figure 11 - Example of power arc test arrangement fo

24、r arc protection system . 34 Tables Table 1 - Specified minimum loads . 19 Table A.1 39 BS EN 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolled Copy, (c) BSI 5 EN 50397-2:2009 Introduction Covered conductors consist of a conductor surrounded by a cover

25、ing 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 temporarily.

26、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 50397-2:2009Lic

27、ensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolled Copy, (c) BSIEN 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 overhea

28、d lines with rated voltages U above 1 kV a.c. and not exceeding 36 kV a.c. NOTE This European 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 applicat

29、ion 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. EN 50397-1:2006 Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. a

30、nd not exceeding 36 kV a.c. - Part 1: Covered conductors EN 50483-5 Test requirements for low 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 Ove

31、rhead lines - Requirements and tests for fittings (IEC 61284:1997) EN 61467 Insulators for overhead 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

32、- Specifications and test methods (ISO 1461) IEC 60050-461 International Electrotechnical Vocabulary (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

33、 Sampling procedures for inspection by attributes - Part 2: Sampling plans indexed by limiting 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

34、. 3.1 type tests (symbol T) tests required to be made before supplying a type of product covered 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 m

35、ade, they need not be repeated unless changes are made in the material, design or manufacturing 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

36、the finished product meets the design specifications BS EN 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolled Copy, (c) BSI 7 EN 50397-2:2009 3.3 routine tests (symbol R) tests intended to prove conformance of fittings to specific requirements and made

37、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 expressed in kV, where U is the r.m.s. value between any two phase conductors. 3.5 ambient temperature the tempera

38、ture 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 tension clamp device which firmly attaches a covered conductor to a support and is designed to transmit the

39、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-tension joints sleeve designed to joint two lengths of non tensioned conductor 3.10 suspension clamp device

40、 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 pin or line post insulator in order to carry its weight and any specified load 3.12 terminals metallic devi

41、ce 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 IEV 461-17-05 BS EN 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Unc

42、ontrolled Copy, (c) BSIEN 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 needed acc

43、essories 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) minimum

44、 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 the fittin

45、g. 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 place 3.20

46、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 50397-1 4 Requ

47、irements 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 rated tensil

48、e 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 50397-2:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 08/04/2010 03:17, Uncontrolle

49、d Copy, (c) BSI 9 EN 50397-2:2009 4.2.1 Tension clamps For the purpose of terminating covered 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 prevent the ingress of moisture during service. NOTE “shall not damage the covering” means no damage shall occu