1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50411-2-4:2012Fibre organisers and closures to be used in optical fibre communication systems Product specificationsPart 2-4: Sealed dome fibre splice closures Type 1, for
2、category S no other technical changes were made to the document. Attention is 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. 4 Fibre organisers an
3、d closures to be used in optical fibre communication systems Product specifications Part 2-4: Sealed dome fibre splice closures Type 1, for category S for aerial; EN 61753-1 category S EN 61753-1 category A Related documents: EN 60793-2-50 Optical fibres Part 2-50: Product specifications Sectional s
4、pecification for class B single-mode fibres (IEC 60793-2-50) EN 60794-2 Optical fibre cables Part 2: Indoor cables Sectional specification (IEC 60794-2) EN 60794-3 Optical fibre cables Part 3: Sectional specification Outdoor cables (IEC 60794-3) EN 61753-1 1)Fibre optic nterconecting devices and pas
5、ive componets perfomance standard Part 1:General and guidance for performance standard (IEC 61753-1) EN 61300 series Fibre optic interconnecting devices and passive components Basic test and measurement procedures (IEC 61300 series) ETS 300 019 Environmental Engineering (EE) - Environmental conditio
6、ns and environmental tests for telecommunications equipment Construction and splice capacity: Variant: Number fibre splices - Maximum capacity b) manufacturing date code: year / month. The preferred colour for the outer closure material is black for polymeric materials. 4 Variants Table 1 Sealed dom
7、e fibre splice closure Type 1, for category S - Variants EN 50411-2-4 X1 XX2 X3 XX4 XX5 X6Variant No. X1Operating environment S Subterranean environment A Aerial environment B Both subterranean and aerial environments Variant No. XX2Closure application base number of cables T1 Track closure (2 cable
8、s minimum) S1 Spur closure (3 cables minimum) D1 Distribution (8 cables minimum) D2 Distribution (18 cables minimum) D3 Distribution (34 cables minimum) D4 Distribution (66 cables minimum) Variant No. X3Cable sealing technology heat, non-heat or both R Cold applied H Heat activated (heat source requ
9、ired) U Universal, both methods in a single cable entry base BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 10 Variant No. XX4Type of organiser system SC Single Circuit (1 or 2 fibres) S organisers NOTE in some cases an M organiser tray can be used as SC or SE organiser tray (by reducing number of store
10、d splices per tray) SE Single Element (4 or more fibres) SR Single Ribbon (4 or more fibres per ribbon) ME Multiple Element (two or more units) M organisers MR Multiple Ribbon (six or more ribbons 4 fibres per ribbons) Depending on the selection of XX4, refer to one of the following Tables 1a, 1b, 1
11、c, 1d and 1e to find XX5and X6: Table 1a SC tray and closure selection XX5 SC trays 06 12 18 24 30 36 42 48 54 60 66 72 96 120 Maximum splice capacity (reference) 12 24 36 48 60 72 84 96 108 120 132 144 192 240 X6Closure B C D E F G NOTE A SC tray contains 2 fibre splices per tray. BS EN 50411-2-4:2
12、012 EN 50411-2-4:2012 (E) 11 Table 1b SE tray and closure selection XX5SE tray 01 02 03 04 05 06 07 08 12 16 18 24 36 42 48 52 60 72 Maximum splice capacity (reference) 12 24 36 48 60 72 84 96 144 192 216 288 432 504 576 624 720 864 X6Closure B CDE FGH NOTE A SE tray contains 12 fibre splices per tr
13、ay. BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 12 Table 1c SR tray and closure selection XX5SR tray 2 4 5 6 7 8 9 10 12 16 18 24 36 Maximum splice capacity (reference) 24 48 60 72 84 96 108 120 144 192 216 288 432 X6Closure BCDEFH NOTE 1 A SR tray has 1 ribbon per tray. NOTE 2 A ribbon has 12 fibres
14、. When using ribbons with a different fibre count than 12 fibres per ribbon, the maximum splice capacity should be changed accordingly. Table 1d ME splice tray and closure selection XX5 ME tray 1A 2A 3A 1B 2B 3B 4B 5B 6B 1D 2D 3D 4D 5D 6D 7D 8D Maximum splice capacity (reference) 24 48 72 24 48 72 9
15、6 120 144 72 144 216 288 360 432 504 576 X6Closure A B C D NOTE 1 ME- Size A and ME- Size B trays have a minimum of 24 splices per tray. NOTE 2 ME- Size D trays have a minimum of 144 splices per tray. BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 13 Table 1e MR splice tray and closure selection XX5MR t
16、ray 1D 2D 3D 4D 6D 8D 1H 2H 3H 4H 5H 6H 7H 8H Maximum splice capacity (reference) 36 72 108 144 216 288 144 288 432 576 720 864 1 008 1 152 X6Closure GH NOTE 1 MR- Size D trays have a minimum of 24 splices/fibres per tray. NOTE 2 MR- Size H trays have a minimum of 144 splices/fibres per tray. NOTE 3
17、 A ribbon has 12 fibres. When using ribbons with a different fibre count than 12 fibres per ribbon, the maximum splice capacity should be changed accordingly. This product specification concerns organisers of only one “Type of organiser system” at a given fibre separation level in parameter XX4. If
18、multiple “Types of organisers/levels” in a single closure is required when ordering; then, typically double the number of SC trays can be inserted in the same organiser envelope as SE. Therefore Maximum splice capacity 2 * (number of SC trays) + 12 * (number of SE trays) EXAMPLES EN 50411-2-4 S D2 H
19、 SC 06 E Distribution 18 cable minimum closure, for underground application with heat activated cable seals, SC fibre management system with 6 SC trays (12 splices) in a size E closure. EN 50411-2-4 A T1 C MR 4D G A track 2 cable minimum joint closure, for aerial application with cold applied cable
20、seals and MR fibre management with 4 splice trays type MR-D in a size G closure. BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 14 5 Dimensional requirements 5.1 Dimensions of closures for Multiple Element and Multiple Ribbon fibres EDaniel DaemsFigure 1 Outline dimensions of M closure Table 2 M Closure
21、 dimensions Closure size Maximum capacity Number of fibres (without storage basket) Outline M closure envelope dimensions (max.) M organiser system Overall length mmE Overall diameter mm F1 Overall diameter mm F2 Multiple Element Multiple Ribbon A 72 fibres NA 505 185 265 B 96 fibres 600 C 144 fibre
22、s 270 312 D 576 fibres 750 G NA 288 fibres 800 275 310 H 1 152 fibres 1 050 NOTE Additional information on the organiser system can be found in Annex D. F1 F2 BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 15 5.2 Dimensions of closures for Single Circuit, Single Element and Single Ribbon Single stackF1F
23、2F1F2F1F2Double stackH (D) G (D)F (D) E (D)EEDCEBDaniel DaemsFigure 2 Outline dimensions of the S closures Table 3 S Closure with SC, SE and SR trays Closure size Maximum capacity Number of fibres (without storage basket) Outline S closure envelope dimensions (max.) S organiser system (common) Overa
24、ll length mmE Overall diameter mm F1 Overall diameter mm F2 Single Circuit Single Element Single Ribbon B aSingle stacks 12f 72f 48f 600 185 265 C 24f 144f 72f 270 312 D 48f 288f 144f 750 E Double stacks 84f 216f 144f 540 275 310 F 144f 432f 288f 620 G 192f 624f 384f 800 H N/A 864f 432f 1 050 NOTE A
25、dditional information on the organiser system can be found in Annex E. aClosure B can also contain M organiser splice trays. BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 16 6 Tests 6.1 Sample size Separate test samples for sealing performance and optical evaluation may be used. For the purposes of thi
26、s standard, a sealing performance test sample is defined as a closure installed with several cable ends. Optical test samples shall be constructed as described in 6.2. Due to their complexity, consecutive testing on the same optical sample is allowed. The minimum recommended sample sizes are given i
27、n Annex B. 6.2 Test sample preparation Sealing performance test samples shall be provided with an air pressure test access valve. The length of the cables extending the closure shall be at least 1 m. The open ends of the cables shall be sealed. Each applicable cable type with minimum and maximum cab
28、le dimensions shall be represented in the test program. Optical test samples shall be constructed in such a way that they will cover all allowed functions of a track joint and/or distribution joint. This shall be realised by building optical circuits for each fibre separation level (typical SC, SE,
29、SR, ME or MR splicing and uncut fibre storage). The fibres for the optical test samples are covered in Annex A. Optical test sample construction: Both extremities of a looped cable are terminated in the Track joint closure (see Figure 3a). The length of the looped cable is chosen in such a way that
30、it is longer than the “dead zone” of an OTDR. This will allow the location of the potential causes of optical losses and differentiate if a change in signal is induced by the organiser system in a single location or distributed over the whole circuit length. The required length depends on the select
31、ed pulse width and dynamic range of the OTDR. Typically a cable loop length of 25 m to 50 m is applied for this purpose. Track joint configurationDrop cableIn Out Tubes 1 2 3 1 2 3 Connections to test equipment Length L Looped cableFibresFigure 3a Track joint configuration sample In the track joint
32、closure the fibres from one cable end are connected to the fibres of the other cable end in such a way that light will sequentially flow through 10 selected fibres in the cable loop. The first and the last fibre of this circuit will be spliced to the fibres of a drop cable for making external connec
33、tions to a light source and optical power meter. All relevant fibre separation levels (SC, SE, SR, ME or MR) are to be represented in the test sample, preferably in separate circuits. BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 17 Track joint configurationDrop cableFibresInOutTubes123123Connections t
34、o test equipmentDistribution joint configurationCircuit 2 Circuit 31Drop cableCircuitUncut fibres circuitDaniel DaemFigure 3b Distribution joint configuration sample In the middle of the looped cable, the cable jacket will be removed over a distance (= window cut) according to the installation instr
35、uctions (see Figure 3b). The bundle of uncut fibres will be inserted and stored inside the distribution joint closure. If uncut fibres can be stored in different separation levels (SC, SE, SR, ME or MR) each of these options shall be executed, preferably in separate circuits. A non-active drop cable
36、 will be installed in the distribution joint closure and the fibres will be stored randomly on the organiser system in between the uncut fibres. NOTE These fibres will be accessed again during the intervention/reconfiguration test 22. 6.3 Test and measurement methods All tests and measurements have
37、been selected from EN 61300. Unless otherwise stated in the individual test details, all attenuation measurements shall be performed at 1 310 nm 25 nm, 1 550 nm 25 nm and 1 625 nm 25 nm for the environmental optical tests, and at 1 550 nm 25 nm and 1 625 nm 25 nm for the mechanical optical tests. Al
38、l optical losses indicated are referenced to the initial attenuation at the start of the test. An “incoming fibre” is defined as a part of an optical circuit containing the fibre entering the product, spliced to a fibre leaving the product. One optical circuit can contain many “incoming fibres”. Lig
39、ht will sequentially flow through all “incoming fibres”. No deviation from the specified test method is allowed. 6.4 Test sequence There is no defined sequence in which tests 6 23 must be run. 6.5 Pass/fail criteria A product will have met the requirements of this specification provided no failures
40、occur in any test. In the event of a failure occurring on a sealing performance test sample, the test shall be re run using a sample size double that of the original. BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 18 Due to the complexity of the optical test samples, consecutive testing on the same opti
41、cal sample is allowed. In case of a failure during the consecutive testing, a new sample shall be prepared and the failed test shall be redone. 7 Test report A fully documented test report and supporting data shall be prepared and must be available for inspection as evidence that the tests described
42、 in Clause 8 have been carried out in accordance with this specification. 8 Performance requirements 8.1 Dimensional and marking requirements Dimensions and marking of the product shall be in accordance with the requirements of Clause 5, and shall be measured using the appropriate EN test method. 8.
43、2 Sealing, optical and appearance performance criteria Table 4 Tightness, optical and appearance performance criteria No. Test Category Requirement Details 1 Sealing performance after test S 2. open/close closure; 3. gaining access to previously installed fibres in the organiser system; 4. adding/in
44、stalling drop cables; 5. break splice and connect to other fibre; 6. cut one or more uncut fibres and splice them to other fibres; 7. adding splicing trays. Optical circuit: 10 live fibres placed in series BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 27 8.6 Environmental optical performance requiremen
45、ts Table 8 Environmental optical performance requirements No. Test Category Requirement Details 23 Change of temperature S Change in attenuation (test 4) Visual appearance (test 3) Method: EN 61300-2-22 Low temperature: -30 C 2 C High temperature: +60 C 2 C Duration at temperature extreme: 4 h Rate
46、of change of temperature: 1 C/min Number of cycles: 20 Measurements required: Before, during (max. interval 10 min) and after the test Recovery procedure: 4 h at normal ambient conditions A Change in attenuation (test 4) Visual appearance (test 3) Method: EN 61300-2-22 Low temperature: -40 C 2 C Hig
47、h temperature: +65 C 2 C Duration at temperature extreme: 4 h Rate of change of temperature: 1 C/min Number of cycles: 20 Measurements required: Before, during (max. interval 10 min) and after the test Recovery procedure: 4 h at normal ambient conditions BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E) 28
48、 Annex A (informative) Fibre for test sample details Table A.1 Fibre references Fibre type: EN 60793-2-50 Type B1.1 Dispersion unshifted single mode fibre Proof stress strain: 1 % Mode field diameter at 1 310 nm: 9,3 m 0,7 m Mode field diameter at 1 550 nm: 10,5 m 1,0 m Cabled fibre cut off wavelength: 1 260 nm 1 550 nm loss performance: 0,5 dB for 100 turns on 60 mm mandrel diameter Cladding diameter: 125 m 1 m Non coloured primary coating diameter: 245 m 10 m Coloured primary coating diameter: 250 m 15 m BS EN 50411-2-4:2012 EN 50411-2-4:2012 (E)
