1、BRITISH STANDARD BS EN 50289-4-11: 2002 Communication cables Specifications for test methods Part 4-11: Environmental test methods A horizontal integrated fire test method The European Standard EN 50289-4-11:2002 has the status of a British Standard ICS 13.220.40; 33.120.10 NO COPYING WITHOUT BSI PE
2、RMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 50289-4-11:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 3 May 2002 BSI 3 May 20
3、02 ISBN 0 580 39591 X National foreword This British Standard is the official English language version of EN 50289-4-11:2002. The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wires and waveguides, RF connectors and accessories for communication and signall
4、ing, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in thi
5、s document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. User
6、s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals fo
7、r change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 32, an inside back cover and a back cover. The BSI copyrig
8、ht date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50289-4-11 NORME EUROPENNE EUROPISCHE NORM March 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normal
9、isation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50289-4-11:2002 E ICS 13.220.40; 33.120.10 E
10、nglish version Communication cables Specifications for test methods Part 4-11: Environmental test methods A horizontal integrated fire test method Cbles de communication Spcifications des mthodes dessai Partie 4-11: Mthodes dessais denvironnement Mthode intgre dessai horizontal au feu Kommunikations
11、kabel Spezifikationen fr Prfverfahren Teil 4-11: Umweltprfverfahren - Horizontale Brandprfung This European Standard was approved by CENELEC on 2001-11-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard t
12、he 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 (English, French, G
13、erman). 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, Belgium, Czech
14、 Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 50289-4-11:2002 - 2 - Foreword This European Standard was prepared by SC 46XC, Multicore, Multipair and Quad Data communic
15、ation cables, of Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50289-4-11 on 2001-11-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publi
16、cation of an identical national standard or by endorsement (dop) 2002-10-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-08-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for
17、information only. In this standard, annex A is normative and annexes B and C are informative. This European Standard has been prepared under the European Mandate M/212 given to CENELEC by the European Commission and the European Free Trade Association. _- 3 - EN 50289-4-11:2002 Contents Page 1 Scope
18、5 2 Normative references5 3 Definitions, symbols and abbreviations 5 4 Test environment.5 5 Test apparatus.5 5.1 Air-inlet chamber.6 5.2 Air-inlet shutter6 5.3 Fire-test chamber7 5.4 Gas burner7 5.5 Removable top cover9 5.6 Exhaust transition .10 5.7 Exhaust duct.10 5.8 Exhaust duct velocity measure
19、ment system .10 5.9 Smoke measurement system .11 5.10 Smoke release rate measurement system12 5.11 Exhaust duct damper12 5.12 Exhaust blower .12 5.13 Fire-test chamber airflow system 12 5.14 Ladder cable tray13 5.15 Fire-test chamber temperature measurement instruments .14 5.16 Data acquisition equi
20、pment.14 5.17 Heat release rate measurement system .15 6 Test specimens15 7 Calibration and maintenance of test equipment .16 7.1 Maintenance .16 7.2 Frequency of calibration16 7.3 Airflow.16 7.3.1 Air leakage test16 7.3.2 Supplemental air leakage test .16 7.3.3 Velocity traverse test .16 7.4 Smoke
21、measurement system calibration test17 7.5 Fuel 17 7.6 Reinforced inorganic cement board test .18 7.6.1 Temperature preheat.18 7.6.2 Temperature history test18 7.7 Standard insulated conductor test.19 7.8 Procedures for calibration of heat release rate measurement equipment .20 7.8.1 Analyser calibra
22、tion .20 7.8.2 Delay time .20 7.8.3 Calibration test 20EN 50289-4-11:2002 - 4 - 8 Test specimen preparation .21 8.1 Specimen conditioning21 8.2 Determination of specimen diameter 21 8.3 Number of cable lengths.21 8.4 Cable mounting.22 9 Test procedures.22 9.1 Flame propagation distance and smoke mea
23、surement test procedure.22 9.2 Heat release test procedure23 9.3 Time-to-ignition test procedure .23 9.4 Flaming droplets/particles test procedure .23 10 Post-test clean-up and inspection .23 10.1 Smoke measurement system post-test procedure23 10.2 Heat release rate post-test procedure.24 11 Calcula
24、tions .24 11.1 Optical density of smoke.24 11.2 Smoke release rate calculation.25 11.3 Exhaust duct velocity measurement calculations 25 11.4 Exhaust duct volumetric flow rate calculations26 11.5 Heat release rate calculations.26 11.5.1 Peak heat release rate 26 11.5.2 Total heat released27 11.6 Tim
25、e-to-ignition calculations .27 11.7 Flaming droplets/particles calculations27 12 Report.27 Annex A (normative).28 Annex B (informative).29 Annex C (informative).30 LIST OF FIGURES AND TABLES Figure 1 Schematic of the air-inlet chamber.6 Figure 2 Schematic of the fire-test chamber.8 Figure 3 Cross-se
26、ction of the fire-test chamber (section B-B, Figure 2).9 Figure 4 Schematic of the section .11 Figure 5 Smoke section 12 Figure 6 Location of section, smoke section .13 Figure 7 Details of ladder cable tray and supports .14 Figure 8 Schematic of gas sampling system15 Figure 9 Temperature history of
27、inorganic reinforced cement board at thermocouple in air (7 m) .19 Figure C.1 Location of bricks.31 Table C.1 Sizes of bricks32- 5 - EN 50289-4-11:2002 1 Scope This Part 4-11 of EN 50289 specifies a horizontal integrated fire test method for determining flame-propagation distance, optical smoke dens
28、ity, total heat release, heat release rate, time to ignition and flaming droplets/particles for communication cables. The cables are tested in a representative installed condition. 2 Normative references This standard incorporates by dated or undated reference, provisions from other publications. Th
29、ese normative references are cited at the appropriate places in the text and the cited publications are listed hereafter. For dated references, subsequent amendments to or revisions of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undat
30、ed references, the latest edition of the cited publication applies, together with any amendments. EN 60695-4 Fire hazard testing - Part 4: Terminology concerning fire tests (IEC 60695-4) 3 Definitions For the purposes of this European Standard, the definitions of EN 60695-4 and the following apply:
31、3.1 flame travel distance distance that the flame travels beyond the extent of the gas burner flame 3.2 optical density of smoke (OD) smoke obscuration described in terms of logarithmic ratio of initial light intensity to instantaneous light intensity 3.3 time-to-ignition first occurrence of initiat
32、ion of combustion 4 Test environment The fire-test room in which the test chamber and smoke measurement system are located shall have provision for a free inflow of air to maintain the room at controlled pressure of 0 Pa to 12 Pa of water column greater than ambient barometric pressure and at a temp
33、erature of 23 C 3 C and relative humidity of 50 % 5 % throughout each test run. The fire-test room and smoke measurement area shall have controllable lighting. 5 Test apparatus The fire-test apparatus shall consist of the following: a) air-inlet chamber; b) air-inlet shutter;EN 50289-4-11:2002 - 6 -
34、 c) fire-test chamber; d) gas burner; e) removable top cover; f) exhaust transition; g) exhaust duct; h) exhaust duct velocity measurement system; i) smoke measurement system; j) exhaust duct damper; k) exhaust blower; l) heat release rate measurement system. 5.1 Air-inlet chamber The fire-test cham
35、ber air-inlet transition shall consist of an L-shaped galvanised steel unit secured to the air-inlet end of the fire-test chamber. The unit shall contain a 300 mm 6 mm x 464 mm 6 mm rectangular opening to allow air to enter the fire-test chamber through the chamber air-inlet shutter. A schematic of
36、the air-inlet chamber is shown in Figure 1. 5.2 Air-inlet shutter A vertically sliding shutter, extending the entire width of the test chamber, shall be provided at the air-inlet end of the fire-test chamber. The shutter shall be positioned to provide an air-inlet opening of 76 mm 2 mm high, measure
37、d from the floor level of the test chamber and across the full width of the chamber, as shown in Figure 1 (see also Figure 2). NOTE Tolerances are contained in applicable subclauses. Figure 1 - Schematic of the air-inlet chamber- 7 - EN 50289-4-11:2002 5.3 Fire-test chamber The fire-test chamber sha
38、ll consist of a horizontal duct of the shapes and sizes shown in Figure 2 and Figure 3. The sides and base of the duct shall be lined with insulating masonry, consisting of refractory fire brick, as illustrated in Figure 3. One side shall be provided with a row of two panes of 6 mm thick high temper
39、ature glass pressure tight observation windows, with the inside pane mounted flush with the inner wall (see Figure 3). The exposed window area shall be 70 mm 6,4 mm x 280 mm 38 mm). The windows shall be located so that the gas burner and the length of the specimens being tested, from the point at wh
40、ich the test fire ends, can be observed from outside the fire-test chamber. The top cover support ledges shall be fabricated of a structural material capable of withstanding abuse of continuous testing. The ledges shall be level with respect to length and width of the chamber and with respect to eac
41、h other. To provide air turbulence for combustion, turbulence baffles shall be provided by positioning six 229 mm x 114 mm x 64 mm thick refractory fire bricks (long dimension vertical and 114 mm dimension parallel to the wall) along the side walls of the chamber at distances of 2,13 m 152 mm, 3,66
42、m 152 mm, and 6,10 m 152 mm, on the window side (do not obstruct the windows) and 1,37 m 152 mm, 2,90 m 152 mm, and 4,88 m 152 mm on the opposite side, as measured from the center line of the gas burner to the center line of the fire bricks. 5.4 Gas burner One end of the test chamber, designated as
43、the air-inlet end in Figure 2, shall be provided with a dual port gas burner, delivering flames upward, to engulf the test specimens. As shown in Figure 3, the burner shall be positioned transversely to each side of the center line of the furnace so that the flame is evenly distributed over the widt
44、h of the specimens. The burner shall be spaced 292 mm 6 mm from the air-inlet end of the test chamber, and 191 mm 6 mm below the removable top cover (see Figure 2 and Figure 3). The burner shall be located 1 320 mm 51 mm downstream of the air-inlet shutter, as measured from the burner center line to
45、 the outside surface of the shutter. Gas to the burner shall be provided through a single inlet pipe, distributed to each port burner through a tee-section. The outlet shall be a nominal 19 mm elbow. The plane of the ports shall be parallel to the chamber floor, such that the gas is directed upward
46、toward the specimen. Each port shall be positioned with its center line 102 mm 6 mm on each side of the center line of the fire-test chamber so that the burner flame is evenly distributed (see Figure 3). The gas burner should be ignited remotely using an electronic ignition system. The controls used
47、 to maintain a constant flow of methane gas to the burners shall consist of the following: a) a pressure regulator; b) a gas meter calibrated to read in increments of not more than 2,8 l; c) a gauge to indicate gas pressure in Pa (or inches of water); d) a quick-acting gas shutoff valve; e) a gas me
48、tering valve; f) an orifice plate in combination with a manometer to assist in maintaining uniform gas-flow conditions. Alternative control equipment, if shown to be equivalent, shall be permitted.EN 50289-4-11:2002 - 8 - NOTE Tolerances are contained in applicable subclauses. Figure 2 - Schematic o
49、f the fire test chamber- 9 - EN 50289-4-11:2002 NOTE Tolerances are contained in applicable subclauses. Figure 3 - Cross-section of the fire test chamber (section B-B, Figure 2) 5.5 Removable top cover The removable top cover shall consist of a metal and mineral insulation composite unit whose insulation consists of nominal 51 mm 6 mm thick mineral composition material. The top unit is shown in Figure 3 and shall completely cover the fire-test chamber. The metal and mineral composite materi
