1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50289-4-17:2011Communication cables Specifications for test methodsPart 4-17: Test methods for UV resistanceevaluation of the sheath of electrical andoptical fibre cableCop
2、yright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN50289
3、-4-17:2011.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/46, Cables, wires and waveguides, radio frequencyconnectors and accessories for communication and signalling.A list of organizations represented on this committee can beobtained on request to its secretary.Thi
4、s publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 59443 4ICS 33.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under
5、the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedCopyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without
6、license from IHS-,-,-BS EN 50289-4-17:2011EUROPEAN STANDARD EN 50289-4-17 NORME EUROPENNE EUROPISCHE NORM February 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre:
7、Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50289-4-17:2011 E ICS 33.120.10 English version Communication cables - Specifications for test methods - Part 4-17: Test methods for UV resis
8、tance evaluation of the sheath of electrical and optical fibre cable Cbles de communication - Spcifications des mthodes dessais - Partie 4-17: Mthodes dessai pour valuer la rsistance aux UV des gaines des cbles lectriques et des cbles fibre optique Kommunikationskabel - Spezifikationen fr Prfverfahr
9、en - Teil 4-17: Prfverfahren zur Beurteilung der UV-Bestndigkeit der Mntel elektrischer und optischer Kabel This European Standard was approved by CENELEC on 2011-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europ
10、ean 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 Secretariat or to any CENELEC member. This European Standard exists in three official versions (Engl
11、ish, 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 status as the official versions. CENELEC members are the national electrotechnical committees of Austria,
12、Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdo
13、m. Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011EN 50289-4-17:2011 2 Foreword This European Standard was prepared by Joint Working Gr
14、oup 2 of the Technical Committee CENELEC TC 46X, Communication cables, and the Technical Committee CENELEC TC 86A, Optical fibres and optical fibre cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50289-4-17 on 2011-02-01. Attention is drawn to the pos
15、sibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of
16、an identical national standard or by endorsement (dop) 2012-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-02-01 _ Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo r
17、eproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011 3 EN 50289-4-17:2011 Contents Introduction . 41 Scope . 52 Normative references . 53 Terms and definitions . 54 Test methods . 64.1 Test methods for outdoor application . 64.2 Test methods for indoor application .
18、 95 Measurements . 106 Evaluation of results . 107 Test report . 11Annex A (normative) UV test apparatus with mercury vapour lamp source . 12Annex B (informative) Recommended performance requirement . 14Annex C (informative) Round robin test results 15C.1 Results obtained on EPR compound 15C.2 Resul
19、ts obtained on LLDPE . 16C.3 Results obtained on different compounds 17Figures Figure A.1 Vapour mercury test apparatus . 12Figure A.2 Vapour mercury test apparatus: Details of construction 13Tables Table C.1 Average tensile strength variation in percentage 15Table C.2 Average elongation variation i
20、n percentage . 15Table C.3 Average tensile strength variation in percentage 16Table C.4 Average elongation variation in percentage . 16Table C.5 Average tensile strength variation in percentage 17Table C.6 Average elongation variation in percentage . 17Copyright European Committee for Electrotechnic
21、al Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011EN 50289-4-17:2011 4 Introduction UV hazard assessment for synthetic compounds is possible using a number of UV sources. For the purpos
22、es of this European Standard three alternative methods are given. Method A uses a xenon arc source to simulate the UV effect on cable sheath. The effect is measured by the variation of mechanical characteristics after exposure. Method B uses a fluorescent lamp to simulate the UV effect on cable shea
23、th. Two different lamps may be used; type I (called UV-A lamps) and type II (called UV-B lamps). The effect is measured as for method A, by the variation of mechanical characteristics after exposure. Method C uses mercury vapour lamp to simulate the UV effect on cable sheath. As for methods A and B,
24、 the effect is determined by the variation of mechanical characteristics after exposure. For outdoor cable application only, the test specimens are periodically subjected to water attack, for methods A and B. For method C, the test is made without water but the results (see Note in 4.1.3.1) indicate
25、 it is applicable to outdoor environments. Other sources and determination methods are capable of detecting and analysing the UV hazard for a cable sheath. Examples of such methods are metal halide lamps or sunshine carbon arc lamps, in combination with proper filters in order to cut off most radiat
26、ion having wavelengths lower than 290 nm. Contracting parties may agree to use such other methods, but such methods cannot claim conformity to EN 50289-4-17. If used, it is recommended that such methods have at least equivalent sensitivity and detection levels as those in this European Standard. In
27、case of dispute the reference source to use is the arc xenon source as described in method A. Informative Annex C gives results obtained with round robin test done for the elaboration of the present standard. NOTE It is important to recall the introduction to EN ISO 4892-1:2000 which says: “The rela
28、tive durability of materials in actual-use exposures can be very different depending on the location of the exposure because of differences in UV radiation, time of wetness, temperature, pollutants and other factors. Therefore, even if results from a specific accelerated laboratory test are found to
29、 be useful for comparing the relative durability of materials exposed in a particular outdoor location or in particular actual-use conditions, it cannot be assumed that they will be useful for determining the relative durability of materials exposed in a different outdoor location or in different ac
30、tual-use conditions.” Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011 5 EN 50289-4-17:2011 1 Scope This European Standard describes thr
31、ee methods to determine the UV resistance of sheath materials for electric and for optical fibre cables. These tests apply for outdoor and indoor cable applications according to the product standard. The samples of sheath are taken from the finished cables. NOTE Although this test method standard is
32、 written principally for communication cables, it may be used for energy cables if called up by the relevant product standard. Methods differ by the nature of the UV source. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated re
33、ferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 60811-1-1:1995 A1:2001 Insulating and sheathing materials of electric and optical cables Common test methods Part 1-1: General application Measuremen
34、t of thickness and overall dimensions Tests for determining the mechanical properties (IEC 60811-1-1:1993 + A1:2001) EN ISO 4892-1:2000 Plastics Methods of exposure to laboratory light sources Part 1: General guidance (ISO 4892-1:1999) EN ISO 4892-2:2006 Plastics Methods of exposure to laboratory li
35、ght sources Part 2: Xenon-arc lamps (ISO 4892-2:2006) EN ISO 4892-3:2006 Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps (ISO 4892-3:2006) ISO 9370 Plastics Instrumental determination of radiant exposure in weathering tests General guidance and basic test method
36、 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tensile strength maximum tensile stress recorded in extending the test specimen to breaking point 3.2 elongation at break increase of the reference length of the test specimen, expressed as the
37、 percentage of the reference length of the unstretched test specimen, at breaking point 3.3 median value when several test results have been obtained and ordered in an increasing or decreasing succession, middle value if the number of available value is odd, and mean of the two middle values if the
38、number is even Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011EN 50289-4-17:2011 6 4 Test methods 4.1 Test methods for outdoor applicat
39、ion 4.1.1 Method A: xenon arc source 4.1.1.1 General According to EN ISO 4892-1:2000, 5.1.6.1, the xenon arc lamp, when appropriately filtered, produces radiations with a spectral power distribution that is a good simulation of average daylight throughout the UV and visible region. The exposure appa
40、ratus is typically constituted by a rotating specimen holder drum, which rotates around the light source, as per EN ISO 4892-1:2000, Figure B.1. 4.1.1.2 Apparatus The testing apparatus is equipped with the following lamps and filters and is set with the parameters prescribed below: a ray source cons
41、isting of a xenon arc lamp (“long arc“ type) equipped with borosilicate filters so that the typical irradiance should be 43 W/m 15 % with a spectrum between 300 nm and 400 nm; a means to provide automatic control of temperature, humidity and cycles; a generator of deionised water with a conductivity
42、 not greater than 5 S/cm (the pH should be recorded); the water shall leave no observable stains or deposits and should therefore contain less than 1 ppm of solids; the rate of flow should be sufficient to guarantee that all the test specimens can be washed; a means to control the irradiance to prod
43、uce (43,0 0,2) W/m2at 340 nm (if the apparatus is not equipped with irradiance control, follow the device manufacturers recommendations to produce this irradiance). More details are given in EN ISO 4892-2:2006. 4.1.1.3 Sample and test specimen preparation A sample, at least 600 mm long, of the finis
44、hed cable or of the outer sheath removed from the finished cable. It shall be used to prepare twelve test specimens. Test specimens shall be prepared according to EN 60811-1-1:1995, 9.1.3. In case, for geometrical reasons, it is not possible to use the above samples (finished cable or outer sheath),
45、 test specimens shall be cut from a moulded plaque of the same material and colour of the cable sheath. The thickness of the test pieces shall be (1,0 0,1) mm. 4.1.1.4 Procedure Six test specimens shall be suspended vertically so that the external surface is uniformly exposed to the action of the ac
46、tinic rays. During the test, the temperature indicated by the black-panel or the black-standard thermometer shall remain in the range (60 3) C and the relative humidity shall remain in the range (50 5) % (only in the dry period in the case of a test for outdoor application). The rotating drum carryi
47、ng the test specimens shall turn at a speed of (1 0,1) r/min. Test specimens are cycled through periods of UV exposure, followed by periods of no radiation during which temperature changes occur. The periods of each cycle, total time of 120 min, are the following: 102 min of dry UV exposure at a tem
48、perature of (60 3) C 1), followed by 18 min of rain exposure, without radiation, at a temperature of (50 5) C. 1)Temperature indicated by the black-panel or the black-standard thermometer. Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50289-4-17:2011 7 EN 50289-4-17:2011 The overall duration of th
