1、Test requirements for lowvoltage aerial bundledcable accessories Part 2: Tension and suspension clamps forself supporting systemBS EN 50483-2:2009raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsNational forewordThis British Standa
2、rd is the UK implementation of EN 50483-2:2009.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 on this committee can be obtained onrequest to its secretary.This publi
3、cation does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 56178 8ICS 29.240.20BRITISH STANDARDBS EN 50483-2:2009Compliance with a British Standard cannot confer immunity fromlegal obligations.This British S
4、tandard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2009 Amendments issued since publicationAmd. No. Date Text affectedEUROPEAN STANDARD EN 50483-2 NORME EUROPENNE EUROPISCHE NORM January 2009 CENELEC European Committee for Electrotechnical Standardiza
5、tion 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 means reserved worldwide for CENELEC members. Ref. No. EN 50483-2:2009 E ICS
6、 29.240.20 English version Test requirements for low voltage aerial bundled cable accessories - Part 2: Tension and suspension clamps for self supporting system Prescriptions relatives aux essais des accessoires pour rseaux ariens basse tension torsads - Partie 2: Matriels dancrage et de suspension
7、pour rseaux ariens en conducteurs isols torsads auto-portsPrfanforderungen fr Bauteile fr isolierte Niederspannungsfreileitungen - Teil 2: Abspann- und Tragklemmen fr selbsttragende isolierte FreileitungsseileThis European Standard was approved by CENELEC on 2008-12-01. CENELEC members are bound to
8、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
9、 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 statu
10、s as the official versions. CENELEC members are the national electrotechnical 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, Pol
11、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50483-2:2009EN 50483-2:2009 2 Foreword This European Standard was prepared by a sub-group of WG 11 of the Technical Committee CENELEC TC 20, Electric cables. The text of the draft was submitted to th
12、e formal vote and was approved by CENELEC as EN 50483-2 on 2008-12-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-12-01 latest date by which the national standards c
13、onflicting with the EN have to be withdrawn (dow) 2011-12-01 This is Part 2 of CENELEC standard EN 50483 “Test requirements for low voltage aerial bundled cable accessories”, which has six parts: Part 1: Generalities; Part 2: Tension and suspension clamps for self supporting system; Part 3: Tension
14、and suspension clamps for neutral messenger system; Part 4: Connectors; Part 5: Electrical ageing test; Part 6: Environmental testing. _ BS EN 50483-2:2009 3 EN 50483-2:2009 Contents 1 Scope 4 2 Normative references . 4 3 Terms and definitions . 4 4 Symbols 6 5 Characteristics 6 6 Marking . 6 7 Gene
15、ral test conditions 6 7.1 Mechanical tests 6 7.2 Temperature 6 8 Type tests . 7 8.1 Type tests for tension clamps 7 8.2 Type tests for suspension clamps 12 8.3 Dielectrical voltage tests 20 8.4 Clamp bolt tightening test 21 8.5 Environmental tests . 22 Bibliography 26 Figures Figure 1 Tension clamps
16、 Tensile tests . 8 Figure 2 Suspension clamp Tensile tests . 13 Figure 3 Slip test at ambient temperature . 15 Figure 4 Test arrangement for slip test at high temperature 16 Figure 5 Cycle and temperature profile . 18 Tables Table 1 Static loads 10 Table 2 Static loads 11 Table 3 Tensile loads . 13
17、Table 4 Tensile loads . 19 BS EN 50483-2:2009EN 50483-2:2009 4 1 Scope EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting aerial bundled cables (ABC) of rated voltage U0/U (Um): 0,6/1 (1,2) kV. This Part 2 applies to tensioning devices consisting of tension a
18、nd suspension clamps designed to be used for installation of self supporting ABC defined in HD 626. Tests described in this document are type tests. NOTE This European standard does not invalidate existing approvals of products achieved on the basis of national standards and specifications and/or th
19、e demonstration of satisfactory service performance. However, products approved according to such national standards or specifications cannot directly claim approval to this European Standard. It may be possible, subject to agreement between supplier and purchaser, and/or the relevant conformity ass
20、essment body, to demonstrate that conformity to the earlier standard can be used to claim conformity to this standard, provided an assessment is made of any additional type testing that may need to be carried out. Any such additional testing that is part of a sequence of testing cannot be done separ
21、ately. 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 references, the latest edition of the referenced document (including any amendments) applies. EN 50483 series, Te
22、st requirements for low voltage aerial bundled cable accessories HD 626, Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV IEC 60050-461, International Electrotechnical Vocabulary (IEV) Part 461: Electric cables 3 Terms and definitions For the purposes of this document, the term
23、s and definitions given in IEC 60050-461 and the following apply. 3.1 aerial bundled cable (ABC) aerial cable consisting of a group of insulated conductors which are twisted together including, or not, a non insulated conductor IEV 461-08-02, modified NOTE The terms bundled conductors, bundled cable
24、s, bundled cores, conductor bundles and bundle could be used as equivalent to the term aerial bundled cable (ABC). 3.2 aerial-insulated-cable insulated cable designed to be suspended overhead and outdoors IEV 461-08-01 3.3 angle of deviation complementary angle to the angle defined by the two parts
25、of the cable on both sides of the suspension clamp BS EN 50483-2:2009 5 EN 50483-2:2009 3.4 clamp bolt bolt which tightens two parts of a clamp together 3.5 conductor insulation insulation applied on a conductor IEV 461-02-02, modified 3.6 conductor (of a cable) part of a cable which has the specifi
26、c function of carrying current IEV 461-01-01 3.7 core assembly comprising conductor and its own insulation IEV 461-04-04, modified 3.8 fixture (or fitting) device for attaching ABC tension or/and suspension clamps to a pole or to a wall 3.9 insulation (of a cable) insulating materials incorporated i
27、n a cable with the specific function of withstanding voltage IEV 461-02-01 3.10 minimum breaking load (MBL) minimum breaking load of the conductor given by HD 626 or the cable manufacturer if not defined in the standard, or minimum breaking load of the clamp given by the clamp manufacturer 3.11 self
28、 supporting system aerial insulated system where all the cores of the ABC contribute to its support 3.12 sheath uniform and continuous tubular covering of metallic or non metallic material, generally extruded IEV 461-05-03 3.13 suspension clamp device which attaches an aerial insulated cable to a fi
29、xture in order to carry its weight and any specified loading IEV 461-18-02, modified 3.14 tension clamp device which firmly attaches an aerial insulated cable to a fixture and is designed to transmit the specified mechanical tension in the cable or messenger to the supporting structure IEV 461-18-01
30、, modified BS EN 50483-2:2009EN 50483-2:2009 6 3.15 type test test required to be made before supplying a type of material covered by this standard on a general commercial basis, in order to demonstrate satisfactory performance characteristics to meet the intended application NOTE These tests are of
31、 such a nature that, after they have been made, they need not be repeated unless changes are made to the accessory materials, design or type of manufacturing process which might change the performance characteristics. 4 Symbols g15slippage after 15 cycles g250slippage after 250 cycles D circumscribe
32、d diameter of conductor bundle (mm) resistivity (m) maximum angle () of deviation of a suspension clamp as recommended by the manufacturer or specified by the customer T tension (N) F sliding force (N) 5 Characteristics These fittings shall be capable of supporting the tensile loads applied to the A
33、BC for which they are designed in accordance with the following tests. Tension and suspension equipment shall be designed to avoid any direct or accidental contact between conductors and between any phase and metallic parts of the clamp. 6 Marking See Clause 6 of EN 50483-1. 7 General test condition
34、s 7.1 Mechanical tests See Clause 9 of EN 50483-1. 7.2 Temperature See Clause 9 of EN 50483-1. BS EN 50483-2:2009 7 EN 50483-2:2009 8 Type tests 8.1 Type tests for tension clamps The performance characteristics of all tension clamps shall be proven by satisfactorily undergoing the range of tests lis
35、ted below. Each clamp shall be tested for the smallest and largest bundled conductor size for which it is marked. The following type tests shall be carried out. Test Subclause Tensile test at ambient temperature 8.1.1 Breaking load test 8.1.2 Tensile test at high temperature 8.1.3 Tensile test at lo
36、w temperature 8.1.4 Dielectrical voltage test (clamp) 8.3.1 Dielectrical voltage test (ABC) 8.3.2 Clamp bolt tightening test 8.4 Environmental tests 8.5 NOTE The test procedures for 3 core and 4 core ABC are similar. 8.1.1 Tensile test at ambient temperature 8.1.1.1 Principle The tension clamps shal
37、l be subjected to high mechanical loads at ambient temperature in order to ensure that they are capable of sustaining loads likely to be encountered in service without being damaged or damaging the conductor. NOTE Test may be carried out on samples which have been subjected to the climatic ageing te
38、st or on the cores (see 8.5.2.1) 8.1.1.2 Test arrangement Two tension clamps shall be assembled on to the ABC, in accordance with the manufacturers instructions, and fitted into a tensile testing machine as shown in Figure 1. The length of tails on the unloaded side of the clamps shall be a minimum
39、of 350 mm and with a minimum radius of 250 mm. The span between the two clamps shall be a minimum of 100 D, where D is the circumscribed diameter of the ABC. The test shall be carried out at ambient temperature. BS EN 50483-2:2009EN 50483-2:2009 8 Dimensions in millimetres Key 1 tension clamp 4 mark
40、ing 2 second tension clamp undergoing test 5 low temperature zone 3 length of tail 350 mm 6 arrangement for low temperature testing Figure 1 Tension clamps Tensile tests 8.1.1.3 Procedure The tensile load shall be applied within 15 min of the clamp being assembled on to the ABC. The load shall be in
41、creased to 20 % of MBL of the cable, and the cores shall be marked where they exit the clamps. The load shall be maintained at that value 10 % for 6 h. NOTE 1 A reduced time period may be agreed between customer and manufacturer. The load shall then be increased to a limit of 80 % of the MBL of the
42、cable for ABC sizes up to, and including, 95 mm. For conductor cross sections above 95 mm the load shall be reduced to a limit of 60 % of the MBL of the cable. This load shall be held for 60 s before the load is removed. NOTE 2 When a clamp of a different rating is needed the clamp may be tested acc
43、ording to the value agreed by the manufacturer and the customer. 8.1.1.4 Requirements No damage shall occur, which would affect the correct function of the tension clamp. Slippage of the cores of the cable with respect to the clamp parts when in contact shall not exceed 10 mm. BS EN 50483-2:2009 9 E
44、N 50483-2:2009 The clamp shall pass the dielectrical voltage test detailed in 8.3.1. The cable shall pass the dielectrical voltage test detailed in 8.3.2. 8.1.2 Breaking load test (optional) NOTE This test may be carried out on samples which have previously been subjected to the corrosion ageing tes
45、t (8.5.1). In this case it is not necessary to carry out the test before the corrosion test. 8.1.2.1 Principle The tension clamps shall be subjected to increasing mechanical loads, at ambient temperature, in order to ensure that they do not break before loads equal to or greater than the MBL of the
46、maximum ABC size, for which the clamp is designed, are reached. 8.1.2.2 Test arrangement Two tension clamps shall be assembled in accordance with the manufacturers instructions on a simulated ABC made of metallic round bars or a suitable conductor of the same diameter as the ABC core and fitted into
47、 a tensile testing machine as shown in Figure 1. To avoid any slippage between bars and the clamps, fixed stops may be used on the bars. The test shall be carried out at ambient temperature. 8.1.2.3 Procedure The tensile load shall be applied within 15 min of the clamp being assembled. The load shal
48、l be increased to the MBL of the largest size of ABC core for which the clamp is designed. It shall be maintained at this load for 60 s. The load shall then be increased until the breaking of the tension clamp occurs. NOTE 1 When requested by the customer a different load may be increased to the MBL
49、 of the clamp given by the manufacturer to check the breaking load of the clamp. The clamps shall not be tightened or adjusted during the test. NOTE 2 The failure value may be noted for information. 8.1.2.4 Requirements Neither tension clamp shall break until the test load has been held for 60 s and the MBL of the cable is reached. 8.1.3 Tensile test at high temperature 8.1.3.1 Principle The tension clamps shall be subjected to
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