1、Test requirements for lowvoltage aerial bundledcable accessories Part 3: Tension and suspension clamps forneutral messenger systemBS EN 50483-3:2009raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsNational forewordThis British Stan
2、dard is the UK implementation of EN 50483-3:2009.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 pub
3、lication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 56179 5ICS 29.240.20BRITISH STANDARDBS EN 50483-3:2009Compliance with a British Standard cannot confer immunity fromlegal obligations.This British
4、 Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2009Amendments issued since publicationAmd. No. Date Text affectedEUROPEAN STANDARD EN 50483-3 NORME EUROPENNE EUROPISCHE NORM January 2009 CENELEC European Committee for Electrotechnical Standardiz
5、ation 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 50483-3:2009 E IC
6、S 29.240.20 English version Test requirements for low voltage aerial bundled cable accessories - Part 3: Tension and suspension clamps for neutral messenger system Prescriptions relatives aux essais des accessoires pour rseaux ariens basse tension torsads - Partie 3: Matriels dancrage et de suspensi
7、on pour rseaux ariens en conducteurs isols torsads avec neutre porteur Prfanforderungen fr Bauteile fr isolierte Niederspannungsfreileitungen - Teil 3: Abspann- und Tragklemmen fr Systeme mit Nullleiter-Tragseil This European Standard was approved by CENELEC on 2008-12-01. CENELEC members are bound
8、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 lists and bibliographical references concerning such national standards may be obtained on application to the Cent
9、ral 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 st
10、atus 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,
11、Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50483-3:2009EN 50483-3:2009 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
12、 the formal vote and was approved by CENELEC as EN 50483-3 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 standard
13、s conflicting with the EN have to be withdrawn (dow) 2011-12-01 This is Part 3 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: Tensi
14、on and suspension clamps for neutral messenger system; Part 4: Connectors; Part 5: Electrical ageing test; Part 6: Environmental testing. _ BS EN 50483-3:2009 3 EN 50483-3:2009 Contents 1 Scope 4 2 Normative references . 4 3 Terms and definitions . 4 4 Symbols 6 5 Characteristics 6 6 Marking . 6 7 G
15、eneral test conditions 7 7.1 Mechanical tests 7 7.2 Temperature 7 8 Type tests . 7 8.1 Type tests for tension clamps 7 8.2 Type tests for suspension clamps 21 Bibliography 41 Figures Figure 1 Test arrangement . 8 Figure 2 Cycle and temperature profile . 11 Figure 3 Arrangement of the fitting for mec
16、hanical test at low temperature 12 Figure 4 Voltage test arrangement on tension clamp only . 17 Figure 5 Dielectrical voltage test arrangement on tension clamp and conductor in air 18 Figure 6 Dielectrical voltage test arrangement on tension clamp in water 20 Figure 7 Mechanical test arrangement 22
17、Figure 8 Mechanical test arrangement 23 Figure 9 Slip test on the suspension clamps . 24 Figure 10 Slip test on the suspension clamps . 25 Figure 11 Corrosion test . 27 Figure 12 Dielectrical voltage test arrangement in air 30 Figure 13 Dielectrical voltage test arrangement for metallic body 31 Figu
18、re 14 Dielectrical voltage test arrangement in water . 33 Figure 15 Swing test arrangement 35 Figure 16 Swing test temperature measurement . 36 Figure 17 Test arrangement for slip test at high temperature 37 Figure 18 Cycle and temperature profile . 39 Table Table 1 Tensile loads . 23 BS EN 50483-3:
19、2009EN 50483-3:2009 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 3 applies to tensioning devices consisting of tension and suspension clamps, and tension and sus
20、pension assemblies used for the installation of ABC with either insulated or bare neutral messenger. The tension and suspension clamps are designed to be installed on neutral conductors of ABC defined in HD 626. Tests described in this document are type tests. NOTE This European standard does not in
21、validate existing approvals of products achieved on the basis of national standards and specifications and/or the demonstration of satisfactory service performance. However, products approved according to such national standards or specifications cannot directly claim approval to this European Stand
22、ard. It may be possible, subject to agreement between supplier and purchaser, and/or the relevant conformity assessment 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 ma
23、y need to be carried out. Any such additional testing that is part of a sequence of testing cannot be done separately. 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 r
24、eferences, the latest edition of the referenced document (including any amendments) applies. EN 50483 series, Test requirements for low voltage aerial bundled cable accessories HD 626 S1:1996, Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV IEC 60050-461, International Electro
25、technical Vocabulary (IEV) Part 461: Electric cables 3 Terms and definitions For the purposes of this document, the terms 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 togeth
26、er including, or not, a non insulated conductor IEV 461-08-02, modified NOTE The terms bundled conductors, bundled cables, 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 suspend
27、ed overhead and outdoors IEV 461-08-01 BS EN 50483-3:2009 5 EN 50483-3:2009 3.3 angle of deviation complementary angle to the angle defined by the two parts of the cable on both sides of the suspension clamp 3.4 clamp bolt bolt which tightens two parts of a clamp together 3.5 conductor insulation in
28、sulation applied on a conductor IEV 461-02-02, modified 3.6 conductor (of a cable) part of a cable which has the specific 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
29、 tension or/and suspension clamps to a pole or to a wall 3.9 insulation (of a cable) insulating materials incorporated in a cable with the specific function of withstanding voltage IEV 461-02-01 3.10 messenger wire or rope, the primary function of which is to support the cable in aerial installation
30、s, which may be separate from or integral with the cable it supports IEV 461-08-03 3.11 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.
31、12 mobile link device linking the suspension clamp to the fixture 3.13 neutral messenger system aerial insulated system where only the neutral messenger supports the ABC 3.14 sheath uniform and continuous tubular covering of metallic or non metallic material, generally extruded IEV 461-05-03 BS EN 5
32、0483-3:2009EN 50483-3:2009 6 3.15 suspension clamp device which attaches an aerial insulated cable to a fixture in order to carry its weight and any specified loading IEV 461-18-02, modified 3.16 suspension or tension assembly clamp with mobile link, or not, and associated fixture 3.17 tension clamp
33、 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, modified 3.18 type test test required to be made before supplying a type of material covered by this
34、standard on a general commercial basis, in order to demonstrate satisfactory performance characteristics to meet the intended application NOTE These tests are of such a nature that, after they have been made, they need not be repeated unless changes are made to the accessory materials, design or typ
35、e of manufacturing process which might change the performance characteristics. 4 Symbols g2slippage after 2 cycles g15slippage after 15 cycles g250slippage after 250 cycles g500slippage after 500 cycles d diameter of core maximum angle () of deviation of a suspension clamp as recommended by the manu
36、facturer or specified by the customer 5 Characteristics These fittings shall be capable of supporting the tensile loads applied to the ABC for which they are designed, referring to the neutral messenger specified MBL, in accordance with the following tests. Tension and suspension equipment shall be
37、designed to avoid any direct or accidental contact between any phase conductor and metallic parts of the clamp. 6 Marking See Clause 6 of EN 50483-1. BS EN 50483-3:2009 7 EN 50483-3:2009 7 General test conditions See Clause 9 of EN 50483-1. 7.1 Mechanical tests See Clause 9 of EN 50483-1. NOTE Where
38、 an assembly is to be tested, each bracket should be secured in accordance with the manufacturers installation instructions. 7.2 Temperature See Clause 9 of EN 50483-1. 8 Type tests Each clamp shall be tested for the smallest and largest messenger size except for environmental tests where only the l
39、argest size is used. 8.1 Type tests for tension clamps The following type tests shall be carried out. Test Applicability Subclause Tensile test at ambient temperature insulated and bare neutral messenger 8.1.1 Tensile test at high temperature insulated neutral messenger only 8.1.2 Tensile test at lo
40、w temperature insulated neutral messenger only 8.1.3 Environmental tests insulated and bare neutral messenger 8.1.4 Clamp bolt tightening test common for both suspension and tension clamps 8.2.1 If a cable breaks beyond any part of the tension clamp, the test result shall be declared void without di
41、screditing the tension clamp. Tests shall be repeated using a new tension clamp and a new cable. In order to find the possible cause of the failure, the test shall be repeated with a reference tension clamp as specified in HD 626 S1:1996, Part 2, 2.3.1. NOTE When agreed between the manufacturer and
42、the customer, the mechanical test loads may be defined by the smallest cable for the clamp but in this case the clamp may only be considered to conform to this standard for the smaller cable size. BS EN 50483-3:2009EN 50483-3:2009 8 8.1.1 Tensile test at ambient temperature (and breaking load test)
43、8.1.1.1 Principle The tension clamps shall 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. The test shall be carried out for the maximum and
44、minimum insulated neutral messenger cross-section, for which the clamp is designed. 8.1.1.2 Test arrangement Figure 1 shows a typical test arrangement. The test configuration can differ from this arrangement as long as it complies with the neutral messenger lengths. Dimensions in metres Key 1 neutra
45、l messenger tension clamp 2 mechanical load measurement device mechanical junction allowing rotation 3 tensioning device current source connection 4 minimum 1 m mechanical tension adjustment Figure 1 Test arrangement 8.1.1.3 Procedure For the maximum and minimum neutral messenger cross-sections, for
46、 which the clamp is designed, a tension clamp shall be installed at a minimum of 1 m from the end of the cable sample. The tension clamp shall be secured to a device similar to the one used for its attachment to the support. At the other end, which is not stripped for insulated messenger, an appropr
47、iate tension device shall be attached to the neutral messenger by means of a tension clamp or other appropriate device. BS EN 50483-3:2009 9 EN 50483-3:2009 NOTE A different distance between the clamps (from 2 m to 10 m), may be agreed between the manufacturer and the customer. A load shall be appli
48、ed and increased until it reaches 80 % of MBL of the messenger. The load shall then be reduced to 20 % of MBL of the messenger. The neutral messenger shall then be marked where it leaves the clamp so that any slippage can be seen with respect to the clamp. The load shall then be increased to 90 % of
49、 MBL of the messenger for both insulated and bare neutral messenger. This load shall be maintained for 60 s. The speed of load application is defined in EN 50483-1, 9.1.4. 8.1.1.4 Requirements The clamp shall not slip by more than 10 mm with respect to the mark on the neutral messenger. No damage shall occur which could affect the correct function of the tension clamp. NOTE When agreed between the customer and the manufacturer,
