EN 13146-5-2012 en Railway applications - Track - Test methods for fastening systems - Part 5 Determination of electrical resistance《铁路设施 路轨 紧固系统试验方法》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 13146-5:2012Railway applications Track Test methods for fasteningsystemsPart 5: Determination of electrical resistanceBS EN 13146-5:2012 BRITISH STANDARDNational forewordTh

2、is British Standard is the UK implementation of EN 13146-5:2012.It supersedes BS EN 13146-5:2002 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee RAE/2, Railway Applications - Track.A list of organizations represented on this committee can beobtained on

3、request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 68150 9ICS 45.080Compliance with a British S

4、tandard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2012.Amendments issued since publicationDate Text affectedBS EN 13146-5:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1314

5、6-5 April 2012 ICS 93.100 Supersedes EN 13146-5:2002English Version Railway applications - Track - Test methods for fastening systems - Part 5: Determination of electrical resistance Applications ferroviaires - Voie - Mthodes dessai pour les systmes de fixation - Partie 5: Dtermination de la rsistan

6、ce lectrique Bahnanwendungen - Oberbau - Prfverfahren fr Schienenbefestigungssysteme - Teil 5: Bestimmung des elektrischen Widerstands This European Standard was approved by CEN on 26 November 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi

7、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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists i

8、n three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standar

9、ds bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey

10、 and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 131

11、46-5:2012: EBS EN 13146-5:2012EN 13146-5:2012 (E) 2 Contents Page Foreword 31 Scope. 52 Normative references 5 3 Terms and definitions, symbols and abbreviations . 53.1 Terms and definitions 53.2 Symbols and abbreviations 54 Principle 55 Apparatus . 55.1 Rail . 55.2 Water . 65.3 Spray equipment 65.4

12、 Electricity supply . 65.5 Instruments . 66 Test specimens (reference method) 67 Procedure (reference method) 68 Test specimens Alternative method . 89 Procedure Alternative method . 810 Calculations 811 Test report 8Annex A (informative) Resistance/time plot . 10BS EN 13146-5:2012EN 13146-5:2012 (E

13、) 3 Foreword This document (EN 13146-5:2012) has been prepared by Technical Committee CEN/TC 256 “Railway applications “, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at

14、 the latest by October 2012, and conflicting national standards shall be withdrawn at the latest by October 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any

15、 or all such patent rights. This document supersedes EN 13146-5:2002. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The main changes in this revision are as follows: a) reference and alternative methods are now includ

16、ed; b) the conductivity of the water used in the test is limited; c) conditioning of the test specimens; d) the correction factor for water conductivity is deleted. In consequence of these changes, the measured resistance may be significantly different from that obtained by the previous method. This

17、 European Standard is one of the series EN 13146 “Railway applications Track Test methods for fastening systems“ which consists of the following parts: Part 1: Determination of longitudinal rail restraint; Part 2: Determination of torsional resistance; Part 3: Determination of attenuation of impact

18、loads; Part 4: Effect of repeated loading; Part 5: Determination of electrical resistance; Part 6: Effect of severe environmental conditions; Part 7: Determination of clamping force; Part 8: In service testing; Part 9: Determination of stiffness. BS EN 13146-5:2012EN 13146-5:2012 (E) 4 These support

19、 the requirements in the series EN 13481 “Railway applications Track Performance requirements for fastening systems“. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bu

20、lgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13

21、146-5:2012EN 13146-5:2012 (E) 5 1 Scope This European Standard specifies a laboratory test procedure for determining the electrical resistance, in wet conditions, between the running rails provided by a fastening system fitted to a steel or concrete sleeper, bearer or element of slab track. It is al

22、so applicable to embedded rail. This test procedure applies to a complete fastening assembly. It is relevant to signalling currents, not to traction currents. A reference procedure and an alternative procedure are included. 2 Normative references The following documents, in whole or in part, are nor

23、matively 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 document (including any amendments) applies. EN 27888, Water quality Determination of electrical conducti

24、vity (ISO 7888) EN 13481-1:2012, Railway applications Track Performance requirements for fastening systems Part 1: Definitions 3 Terms and definitions, symbols and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13481-1:2012 apply. 3.2

25、 Symbols and abbreviations For the purposes of this document, the following symbols apply. R measured resistance for each test, in ; R arithmetic mean of test results, in ; conductivity of water used, in mS/m. 4 Principle The electrical resistance between two short lengths of rail fastened to the su

26、pport is measured whilst the whole support and fastenings are sprayed with water at a controlled rate. 5 Apparatus 5.1 Rail For surface mounted rail systems, two short lengths (approximately 0,5 m) of the section for which the fastening assembly under test is designed. For embedded rail systems the

27、rail is included in the test specimen. The rail shall be unlaminated and have neither loose rust on the surface nor be polished on the foot. BS EN 13146-5:2012EN 13146-5:2012 (E) 6 5.2 Water A supply of potable water supply with a conductivity of (50 5) mS/m measured in accordance with EN 27888 at t

28、he temperature at the time of spraying and corrected to a temperature of 25 C. NOTE 1 Correction factors for temperature are given in EN 27888. NOTE 2 The conductivity of the water may be adjusted to the specified limits by the addition of sodium chloride or distilled water. 5.3 Spray equipment A fr

29、ame which can be moved parallel to the rails, incorporating four spray nozzles as shown in Figure 1. The nozzles shall have a diameter 3,6 mm and a spray cone of (100 to 125).The equipment shall include a means of controlling and measuring the flow of water to each nozzle. 5.4 Electricity supply Alt

30、ernating current supply of (30 3) V RMS and (50 15) Hz. 5.5 Instruments Instruments to measure the applied voltage and resultant current flow between the rails with an accuracy of 1 % which permit the calculation of resistance over the range 1 102 to 1 106. The equipment shall have a capability to p

31、rint out a record of calculated resistance against time. The calibration of the instruments shall be verified with equipment having certified traceability to European or International Standards using the International System of units (SI). 6 Test specimens (reference method) Three steel or concrete

32、sleepers or bearers (with two rails only) or elements of slab track with cast-in fastening components or holes and rail seats as made without modification for this test. For embedded rail with mechanical fastening assemblies the length of the test specimen shall be equal to the nominal sleeper spaci

33、ng in EN 13481-1:2012, Table 1. For embedded rail with adhesive fastening systems the length of the test specimen shall be (500 to 750) mm. All test specimens shall include two running rails. Each specimen is tested individually. The test specimens are described as sleepers in the test procedure. 7

34、Procedure (reference method) The test shall be carried out under cover and protected from rain and draughts in a room which is ventilated and has an air temperature (15 to 30)C. Fit the rails to one sleeper using all the fastening components as assembled in track. Support the sleeper, which shall be

35、 surface dry, on two electrically insulating blocks, not less than 50 mm thick, as shown in Figure 1. NOTE Suitable supports are wood blocks with plastics pads attached to provide insulation. If the sleeper has not been used for this test before, carry out the spraying procedure and leave for no les

36、s than 24 h or until surface dry, whichever is longer, before performing the test. BS EN 13146-5:2012EN 13146-5:2012 (E) 7 Set up the measuring instruments as shown in Figure 2 and connect to the electrical supply. Move the spray equipment over the sleeper, anchor the equipment in position and spray

37、 with water at (10 to 20)C at a rate of (7 1) l/min from each nozzle for 2 min. Record the voltage and current during spraying and for not less than 10 min after spraying has ceased. Repeat the test twice more on the other two similar test specimens. If a specimen has been previously tested, allow n

38、o less than 120 h, or the time taken for the specimen to become surface dry, whichever is the longer, between tests. A typical resistance/time plot is shown in Figure A.1. Key 1 spray frame 2 spray nozzles as described in 5.3 3 test sleepers as described in Clause 6 4 wood blocks 5 plastics pads Fig

39、ure 1 Test arrangement BS EN 13146-5:2012EN 13146-5:2012 (E) 8 Figure 2 Measurement circuit 8 Test specimens Alternative method One steel or concrete sleeper or bearer or embedded rail specimen in accordance with Clause 6. The test specimen is described as a sleeper in the test procedure. 9 Procedur

40、e Alternative method Follow the procedure in Clause 7. When the test on the single sleeper is complete, leave the sleeper to dry for at least 120 h and then repeat the procedure. After the second test, leave the sleeper to dry for at least 120 h and then repeat the procedure. 10 Calculations For eac

41、h test, find the minimum resistance R from the resistance-time plot. The result of the test R is the arithmetic mean of the three values of R obtained. 11 Test report The test report shall include at least the following information: a) number, date of issue and title of this European Standard; b) na

42、me and address of laboratory performing the test; c) date test performed; d) test procedure used (reference or alternative method); e) name, designation and description of fastening assembly, including individual components, tested; f) origin of test specimens; g) rail section used in test; BS EN 13

43、146-5:2012EN 13146-5:2012 (E) 9 h) details of the sleeper, bearer or element of slab track used; i) conductivity of water used and the temperature of the water at the time of measurement; j) resistance-time plot for each test and value of R; k) result of the test, R in . BS EN 13146-5:2012EN 13146-5

44、:2012 (E) 10 Annex A (informative) Resistance/time plot Figure A.1 shows a typical resistance/time plot as described in Clause 7. Key 1 resistance R,in 2 time, in min Figure A.1 Typical resistance Time plot This page deliberately left blankBSI is the independent national body responsible for prepari

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