EN 50582-2016 en Procedure to assess the circuit integrity of optical fibres in a cable under resistance to fire testing.pdf

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1、BS EN 50582:2016Procedure to assess the circuitintegrity of optical fibres in acable under resistance to firetestingBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 50582:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN

2、50582:2016.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/86/1, Optical fibres and cables.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a co

3、ntract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 78604 4ICS 13.220.40; 33.180.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published un

4、der the authority of theStandards Policy and Strategy Committee on 31 August 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 50582:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50582 August 2016 ICS 13.220.40; 33.180.10 English Version Procedure to ass

5、ess the circuit integrity of optical fibres in a cable under resistance to fire testing Procdure dvaluation de lintgrit des circuits fibres optiques dans un cble soumis un essai de rsistance au feu Prfung des bertragungsverhaltens im Brandfall von Lichtwellenleiterkabeln fr die Verwendung in Notstro

6、mkreisen bei ungeschtzter Verlegung (Durchmesser kleiner oder gleich 20 mm) This European Standard was approved by CENELEC on 2016-06-27. 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 nat

7、ional 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 CENELEC member. This European Standard exists in three official versions (English, French, German).

8、A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bul

9、garia, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switze

10、rland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in a

11、ny form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50582:2016 E BS EN 50582:2016EN 50582:2016 (E) 2 Contents Page European foreword 3 1 Scope . 4 2 Normative references . 4 3 Circuit integrity (Continuity of signal supply) . 4 4 Cable test procedure 5 4.1 Test equipment . 5

12、 4.2 Sample preparation 5 4.3 Test procedure 5 4.4 Optical measurements during fire 6 5 Duration of survival 6 6 Test report (optical fibre cables) . 6 Annex A (normative) Field of direct application and extended application of test results 7 A.1 Terms and definitions 7 A.2 Field of direct applicati

13、on 7 A.2.1 Orientation . 7 A.2.2 Bending radius 7 A.3 Extended Application of test results (EXAP) . 8 A.3.1 General . 8 A.3.2 Product families for EXAP . 8 A.3.3 EXAP procedure . 8 Annex B (informative) Information regarding classification 9 B.1 General . 9 B.2 Functional requirement (PH or P) and I

14、nterpretation . 9 B.3 Classification 9 Bibliography . 10 Tables Table 1 Maximum allowed attenuation change during the test 5 BS EN 50582:2016EN 50582:2016 (E) 3 European foreword This document (EN 50582:2016) has been prepared by CLC/TC 86A “Optical fibres and optical fibre cables”. The following da

15、tes are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-06-27 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2019-06-27 Attention is

16、drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CENELEC by the European Commission and the

17、 European Free Trade Association. BS EN 50582:2016EN 50582:2016 (E) 4 1 Scope This European standard specifies the details for the point of failure, continuity checking arrangement, test sample, test procedure and test report relevant to optical fibre cables tested as described either in EN 50200 or

18、 in EN 50577. The test determines the survival time for circuit integrity of the optical fibre cables when exposed to fire under the conditions either given in EN 50200 or given in EN 50577. EN 50200 is limited to cables with an overall diameter not exceeding 20 mm. This standard includes (Annex A)

19、the field of direct application and rules for extended application of test results (EXAP). Details regarding P classification using data from the EN 50577 test and PH classification using data from the EN 50200 test are given in EN 13501-3. Information regarding classification is given in Annex B. 2

20、 Normative references The following documents, in whole or in part, are normatively 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 amendm

21、ents) applies. EN 13501-3, Fire classification of construction products and building elements Part 3: Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers EN 50200, Method of test for resistance to

22、 fire of unprotected small cables for use in emergency circuits EN 50577, Electric cables Fire resistance test for unprotected electric cables (P classification) EN 60793-1-46, Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittance (IEC 60793

23、-1-46) EN 60793-2, Optical fibres Part 2: Product specifications General (IEC 60793-2) 3 Circuit integrity (Continuity of signal supply) The criteria that are used for defining fire resistant optical fibre cables are deemed to demonstrate the ability of the cable to maintain a reliable signal transm

24、ission when subjected to fire. Circuit integrity is based upon continuity of optical signal supply. This clause specifies characteristics that shall be used to define the continuity of signal supply / maintenance of circuit integrity (continuity) under fire conditions for optical fibre cables. The c

25、ircuit integrity i.e. continuity of optical signal supply is deemed to be maintained if the maximum increase in attenuation does not exceed the value given in Table 1 during the test duration. Continuity of optical signal supply (see 4.4) can generally be performed by two methods: (A) Monitor indivi

26、dual fibres for attenuation change; (B) Loop-back measurements: this method splices the fibres under test to each other so that they are concatenated in a continuous length. The attenuation change is determined by dividing the attenuation change across all loop-back fibres under test by the number o

27、f loop-backed fibres. BS EN 50582:2016EN 50582:2016 (E) 5 For both method (A) and method (B), the resulting value shall not exceed the value given in Table 1 during the test duration when performed according to EN 50200 or when performed according to EN 50577. Table 1 Maximum allowed attenuation cha

28、nge during the test Fibres in the cable EN 607932 class B single-mode fibre (1550 nm) EN 607932 category A1 multimode fibre (1300 nm) Max allowed attenuation change (dB/meter of fibre under test) 1,0 2,0 The length of the fibre in the cable under test to be considered is equal to 1 m for the EN 5020

29、0 test method, i.e. the length mounted on the heat resisting wall. For the EN 50577 test method the length to be considered is equal to the exposed length of the cable to the fire in the furnace considering also the exits (cable in the mineral wool). 4 Cable test procedure 4.1 Test equipment When EN

30、 50200 fire test method is used the test equipment consists of: a gas burner, a heat resisting wall, a shock producing device as described in EN 50200. When EN 50577 fire test method is used the test equipment consists of: a furnace with advised minimum internal dimensions 3 m (l) 1,5 m (d) 2,5 m (h

31、), suitable burners, a cable tray with suspensions and horizontal supports, in a “U” or “S” bend configuration as described in EN 50577. In both the EN 50200 and EN 50577 fire test methods, the test equipment further consists of: a fibre optic attenuation measurement system according to EN 60793-1-4

32、6. 4.2 Sample preparation The sample to be tested shall be a length of finished cable (between 20 m and 50 m, or more as required by the optical attenuation measuring system) sufficiently long that the two ends emerge from the test chamber. NOTE This length of the test sample for optical fibre cable

33、s is different from the required length for power and control cables in EN 50200 or in EN 50577. The test samples shall be mounted in accordance with either EN 50200 or EN 50577, taking into account the minimum bending radius of the cable in normal use. The approximate middle of the test sample shal

34、l be positioned in the flame for the EN 50200 test and in the furnace for the EN 50577 test. The fibre or the fibres selected for the optical measurements as reported in Clause 3 shall be connected to the optical measuring apparatus. 4.3 Test procedure The test shall be conducted as described either

35、 in EN 50200 or in EN 50577 together with the additional details for optical fibre cables given in this standard. BS EN 50582:2016EN 50582:2016 (E) 6 The number of fibres to be tested for continuity of optical signal supply shall be two (2) fibres for cables containing up to six (6) fibres; for fibr

36、e counts more than six (6), the number of fibres to be tested shall be six (6). NOTE This prescription applies unless otherwise agreed upon between manufacturer and customer, but will not be the basis of classification. The optical fibres under test shall be selected evenly distributed among the cab

37、le basic optical elements. 4.4 Optical measurements during fire Connect the fibre(s) to an optical apparatus to monitor and/or measure the change in optical transmittance (optical attenuation) in accordance with EN 60793-1-46, method A or B. The test shall be carried out at the nominal wavelength of

38、 operation of the fibre i.e. 1 550 nm for single-mode fibre or 1 300 nm for multimode fibre. 5 Duration of survival The duration of survival is measured in minutes from the start of the test to the point of failure when the increase in attenuation exceeds the values given in Table 1; it shall be rec

39、orded for each cable tested up to a maximum survival time of 120 min. By agreement between supplier of the cable and the test house the test duration may be extended but will not be the basis of classification. 6 Test report (optical fibre cables) The test report shall include the following informat

40、ion: 1) full description of cable tested; 2) manufacturer of cable tested; 3) test laboratory; 4) test wavelength; 5) number of optical fibres under test; 6) optical test equipment or optical devices used; 7) type and disposition of clips supporting cable sample tested to EN 50200 or type of trays a

41、nd plastic ties supporting cable sample tested to EN 50577; 8) the actual cable bending radius used for the test; 9) method used for temperature monitoring during the verification procedure; 10) the duration of survival achieved; 11) method of signal monitoring: (A) individual fibres; (B) concatenat

42、ed fibres; 12) the number of this EN. BS EN 50582:2016EN 50582:2016 (E) 7 Annex A (normative) Field of direct application and extended application of test results A.1 Terms and definitions For the purposes of this annex, the following terms and definitions apply. A.1.1 direct field of application ou

43、tcome of a process (involving the application of defined rules) whereby a test result is deemed to be equally valid for variations in one or more of the product properties and/or intended end use applications. A.1.2 classification process defined in EN 13501, whereby the fire performance parameters

44、obtained from the results of one test, or a set of tests, or from a process of extended application, are compared with limiting values for those parameters that are set as criteria for achieving a certain classification. Note 1 to entry: The relevant classes and related criteria are specified in the

45、 following Commission Decisions: Commission Decision 2000/367/EC (OJ L 133 of 6.6.2000). A.1.3 product (cable) family range of cables within defined limits of constructional design (as defined by this Annex A) A.1.4 extended application of test results EXAP outcome of a process (involving the applic

46、ation of defined rules that may incorporate calculation procedures) that attributes, for a cable family, a test result on the basis of one or more test results to the same test standard A.2 Field of direct application A.2.1 Orientation Cables with PH-classification or with P-classification according

47、 to EN 13501-3 and tested in accordance with either EN 50200 or with EN 50577 together with the additional details for optical fibre cables given in this standard are suitable for both horizontal and vertical installation. A.2.2 Bending radius The bending radius of the cable in normal use shall not

48、be smaller than the minimum bending radius specified by the manufacturer and tested. BS EN 50582:2016EN 50582:2016 (E) 8 A.3 Extended Application of test results (EXAP) A.3.1 General Clause A.3 gives guidance on the procedure and rules for extended application using test results obtained either from

49、 EN 50200 or from EN 50577 together with the additional details for optical fibre cables given in this standard in order to evaluate and classify the resistance to fire performance of optical-fibre cables. A.3.2 Product families for EXAP An EXAP is only possible when cables belong to a defined family. For the application of these EXAP rules and procedure, a cable family shall be defined as follows: A family of cables is a specific range of products of the same general construction (design elements) and varying only in number of opt