1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50411-3-1:2012Fibre organisers and closures to be used in optical fibre communication systems Product specificationsPart 3-1: Fibre management system, splice wall box, for
2、category C for external above ground; IEC 61753-1:2007, category C IEC 61753-1:2007, category G Fibre separation level - FMS splice trays: Single circuit (2 fibres per tray), Single ribbon (4 fibres per tray), Single element (12 fibres per tray), Multiple ribbon (144 fibres per tray) Multiple elemen
3、t (144 fibres per tray) For reference on how fibre separation levels fits into the modularity of FMS organisers, see also FMS organiser options in Annexes C to E Construction and splice tray capacity: FMS Number splice trays (maximum) for each fibre separation level SC, SE, SR, ME and MR Number of t
4、rays needed for: S organiser M organiser Single circuit SC (4f) Single element SE (12f) Single ribbon SR (4f) Multiple element ME (144f) Multiple ribbon MR (144) Typical capacity 12 fibres 6 1 3 1 1 Typical capacity 144 fibres 36 12 36 1 1(12 f/R) Box type - minimum no of cable entries: Track box -
5、2 Spur box - 3 Distribution box - 6 Schematic diagrams (Cable entries can be in any orientation) Typical installations A Street cabinet or external configurations Typical installations B Office internal configurations BS EN 50411-3-1:2012EN 50411-3-1:2012 - 6 - 1 Scope 1.1 Product definition This Eu
6、ropean Standard covers wall boxes for up to 288 fibre splices. Wall boxes for connectors will be covered in a future part of the EN 50411-3 series. This European Standard covers two environmental service requirements, for use inside a building under category C and externally of buildings under categ
7、ory G both to EN 61753-1:2007. This European Standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements of a fully installed optical fibre wall box, in order for it to be categorised as an EN standard product. The wall box must be suitabl
8、e for fixing to a vertical internal or external surface above ground level. The wall box is a housing containing a fibre management system, containing splice trays of various fibre separation levels, and may contain one or more of the following: storage and/or routing of cable; through-box/uncut fib
9、re, cable storage; passive devices. This document specifies the number of splice trays for each fibre separation level. 1.2 Operating environment The tests selected combined with the severity and duration is representative of indoor and outside plant for above ground environments defined by: EN 6175
10、3-1: - category C: Controlled environment - category G: Ground level environment 1.3 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this European Standard does not guarantee the reliability of the product. This should be pre
11、dicted using a recognised reliability assessment programme. 1.4 Quality assurance Compliance with this European Standard does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. 1.5 Allowed fibre and cable types All ty
12、pes of fibre are permitted for a FMS with a minimum bend radius of 30 mm. A minimum bend of 20 mm can only be used with a B 6 fibre. The box, once tested according to this product specification, will be also suited for other fibre types, for example bend insensitive, dispersion shifted, non-zero dis
13、persion shifted and multimode fibres. This wall box standard allows both single-mode and multi-mode fibre to be used and covers all IEC standard optical fibre cables with their various fibre capacities, types and designs as long as fitting in the box does not contravene the minimum bend radius. The
14、minimum bend radius of fibre depends on its type, and is applicable for all operational wavelengths: EN 60793-2-10, Type A1 multimode fibre is 30 mm; EN 60793-2-50, Type B 1.1 and B 1.3 singlemode fibre is 30 mm; (20 mm is accepted for total lengths less than 2 m) EN 60793-2-50, Type B6-a1, B6-a2 si
15、nglemode fibre (ITU-T G.657) is 20 mm (15 mm is accepted for total lengths less than 0,5 m) BS EN 50411-3-1:2012EN 50411-3-1:2012 - 7 - 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For date
16、d references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50411-2 Fibre organisers and closures to be used in optical fibre communication systems Product specifications Part 2: General and guidance for o
17、ptical fibre cable joint closures, protected microduct closures, and microduct connectors EN 60529 Degrees of protection provided by enclosures (IP Code)(IEC 60529) EN 60695-11-10 Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test methods (IEC 60695-11-10) EN 60793-2
18、-50:2008 Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres (IEC 60793-2-50:2008) EN 60793-2-10 Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres (IEC 60793-2-10) EN 60794-2 Optical fibre cab
19、les 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 61034-1 Measurement of smoke density of cables burning under defined conditions Part 1: Test apparatus (IEC 61034-1) EN 61300-2-1 Fibre opti
20、c interconnecting devices and passive components Basic test and measurement procedures Part 2-1: Tests Vibration (sinusoidal) (IEC 61300-2-1) EN 61300-2-4 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-4: Tests Fibre/cable retention (IEC 61300
21、-2-4) EN 61300-2-9 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-9: Tests Shock (IEC 61300-2-9) EN 61300-2-12:2009 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-12: Tests Impact (IEC 6
22、1300-2-12:2009) EN 61300-2-22 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-22: Tests Change of temperature (IEC 61300-2-22) EN 61300-2-26 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2
23、-26: Tests Salt mist (IEC 61300-2-26) EN 61300-2-33 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-33: Tests Assembly and disassembly of fibre optic closures (IEC 61300-2-33) EN 61300-2-34 Fibre optic interconnecting devices and passive compon
24、ents Basic test and measurement procedures Part 2-34: Tests Resistance to solvents and contaminating fluids of interconnecting components and closures (IEC 61300-2-34) EN 61300-3-1 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations
25、 and measurements Visual examination (IEC 61300-3-1) BS EN 50411-3-1:2012EN 50411-3-1:2012 - 8 - EN 61300-3-3:2009 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-3: Examinations and measurements Active monitoring of changes in attenuation and
26、return loss (IEC 61300-3-3:2009) EN 61300-3-28 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-28: Examinations and measurements Transient loss (IEC 61300-3-28) EN 61753-1:2007 Fibre optic interconnecting devices and passive components performa
27、nce standard Part 1: General and guidance for performance standard (IEC 61753-1:2007) EN 61756-1 Fibre optic interconnecting devices and passive components Interface Standard for fibre management systems Part 1: General and guidance (IEC 61756-1) EN 61758-1 Fibre optic interconnecting devices and pa
28、ssive components Interface standard for closures Part 1: General and Guidance (IEC 61758-1) IEC 60754-2 Test on gases evolved during combustion of materials from cables Part 2: Determination of acidity (by pH measurement) and conductivity 3 Terms, definitions and abbreviations 3.1 Terms and definiti
29、ons For the purposes of this document, the following terms and definitions apply. 3.1.1 fibre splicing management system assembly of fibre splicing cassettes built in such a way that the routing of fibres and the storage of the fibres and fibre splices is done in a controlled way. Controlled means i
30、n this case that the mechanical stress is controlled by ensuring a minimum bending radius of the fibres. 3.1.2 single circuit fibre management system fibre system separation level, that is down to the individual customer level achieving the minimum of customer circuit disturbance 3.1.3 cable element
31、 grouping of fibres under the cable sheath 3.2 Abbreviations PS Product Specification OD Outside Diameter ID Inside Diameter FMS Fibre Management System 4 Description 4.1 Optical fibre wall box housing An optical fibre wall box comprises a housing that is attached to wall and the ends of the joined
32、cable sheath. The wall box has a means of containing and protecting the fibres, splices, and other passive optical devices. Wall boxes used for blowing cable or fibre comprises an access housing that allows the interconnection of cable microducts or tubes where the ends of the microducts or cables c
33、ontaining empty tubes are contained. The wall box also contains an FSM. BS EN 50411-3-1:2012EN 50411-3-1:2012 - 9 - The fibre management wall box provides facilities for the environmental protection, housing for fibre management systems and sealing of input and output optical cables for category G.
34、In order to comply with the standard, the optical functionality, physical, geometrical and mechanical requirements are defined. The following table illustrates the concept of a single wall box design/size being able to accommodate various fibre separation levels in a splice wall box for SC and SE. T
35、able 1 Common wall box sizes with splice capacities for fibre separation levels SC and SE EN 50411-3-1 Compatible tray/box envelope (size)Number Splices (SC)Number trays SC (2 fibres/tray)Number splices (SE) Number trays SE (12 fibres/tray)A and F 8 4 24 2 A and H 24 12 72 6 C and K 48 24 144 12 D a
36、nd N 96 48 288 24 The design of the wall box housing shall allow the jointing of two or more cable ends in the following configurations or applications: Common wall boxes covering: (T) Track wall box configuration used on customer feed cable with a minimum of 2 cable entries specified for each wall
37、box size in the tables, typical when joining two cables along a track. (S) Spur wall box configuration used on local feeder cable with minimum of 3 cable entries, typically a cable drop off point to along a track feeder cable. (D) Distribution wall box configuration used on a local feeder cable with
38、 a minimum of 6 cable entries to distribute smaller cables to different locations. NOTE Cable entries can be more than one cable per cable entry port. The design of the wall box housing shall allow the joining together of at least one pair of cables which are not at the end of a cable section, witho
39、ut cutting all fibres between both cable openings. This application is generally known as distribution joint or external node, but also called a mid-span or balloon splice wall box. It is desirable that the wall box can be re-opened when necessary without interruption or disturbance of the traffic o
40、f the live circuits. 4.2 Cable seals/fixings For category G the cable entry or exit ports in the wall box must have a sealing and fixing system that can be either: a) Dedicated heat activated with heat source, for example, electrical, infrared, hot air or flame: 1) thermo-shrinkable materials; 2) ho
41、t melt adhesives; 3) polyethylene injection welding; b) Cold applied: 1) mastic, tapes, pastes, potting compounds, gels and cold adhesives; 2) o-rings, grommets, rubber shapes, pre-expanded tubing are cold processes; c) Combined heat activated and cold applied: BS EN 50411-3-1:2012EN 50411-3-1:2012
42、- 10 - 1) The optical fibre wall box allows for a physical housing structure that provides for optical cable fixing, sealing, anchoring, water and gas blocking, storage and routing up to the input and output fibres of the fibre or microduct management system. 4.3 FMS organiser system The organiser s
43、ystem provides means for routing, storing and protecting of fibre splices or other passive optical devices in a predetermined order, from one cable sheath opening to another. Fibre circuits may be separated to an appropriate separation level. This will limit the risk of interruption of traffic to th
44、ose fibres that belong to the same group of circuits. Single circuit (SC) is a fibre management system that is a group of fibres providing 1 termination or service of 1 or 2 fibres. In this document a Single Circuit is considered to be a circuit of 2 fibres. If the separation level for one terminati
45、on is more than 2 fibres, then the appropriate number of fibres can be stored on one tray of the single circuit system. Single element (SE) is a fibre management system that is a cable subassembly comprising one or more optical fibres inside a common covering e.g. tube or inside one groove of a groo
46、ved cable (slotted core cable). Single Elements provide more than one termination or circuit of typically 12 fibres. In this document a Single Element is considered to be a group of 12 fibres. Single ribbon (SR) is a fibre management system that is a cable subassembly comprising one optical ribbon.
47、Single Ribbon is a group of fibres providing one termination or service of typically 4, 8 or 12 fibres. Multiple element (ME) is a fibre management system that provides all necessary equipment to connect a defined number of incoming and outgoing fibres/cables. It comprises storage and protection of
48、fibres and interconnections in one splice tray for more than one Single Element. Typically splice tray capacities between 24 and 144 fibres. Multiple ribbon (MR) fibre management provides all necessary equipment to connect a defined number of incoming and outgoing fibre ribbons that are generally ho
49、used within a singe tube or slot within the cable. This tube is fixed to the entry and exit ports of the splice tray. It comprises storage and protection of more than one single ribbon, but typically six or more fibre ribbons and their interconnections in a single splice tray for ribbons between 4 and 36 fibres, but typically 12 fibre ribbons. There are also many different names for this structure, e.g. mass storage or
