Superseded by T MU TE 01005 ST v1.0, 26/07/2019 SINGLE-MODE OPTICAL FIBRE CABLE SPM 0677 Engineering Specification Telecommunications Version 1.0 Issued March 2011 Owner: Telecommunications Network Manager, Communications & Control Systems Approved P. Kerrigan Authorised J. Byron by: Telecommunications Network by: Chief Engineer, Manager Telecommunications Communications & Control Chief Engineer Division Systems Asset Operations Disclaimer This document was prepared for use on the RailCorp Network only. RailCorp makes no warranties, express or implied, that compliance with the contents of this document shall be sufficient to ensure safe systems or work or operation. It is the document user’s sole responsibility to ensure that the copy of the document it is viewing is the current version of the document as in use by RailCorp. RailCorp accepts no liability whatsoever in relation to the use of this document by any party, and RailCorp excludes any liability which arises in any manner by the use of this document. Copyright The information in this document is protected by Copyright and no part of this document may be reproduced, altered, stored or transmitted by any person without the prior consent of RailCorp. Engineering Specification UNCONTROLLED WHEN PRINTED Page 1 of 17
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Telecommunications Engineering Specification · Water Peak fibres meeting ITU-T Recommendation G652.D. c) The specified quantity of additional SMOF Non-Zero Dispersion Shifted fibres
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SINGLE-MODE OPTICAL FIBRE CABLE
SPM 0677
Engineering Specification Telecommunications
Version 1.0
Issued March 2011
Owner: Telecommunications Network Manager, Communications & Control Systems
Approved P. Kerrigan Authorised J. Byron by: Telecommunications Network by: Chief Engineer,
Manager Telecommunications Communications & Control Chief Engineer Division Systems Asset Operations
Disclaimer This document was prepared for use on the RailCorp Network only. RailCorp makes no warranties, express or implied, that compliance with the contents of this document shall be sufficient to ensure safe systems or work or operation. It is the document user’s sole responsibility to ensure that thecopy of the document it is viewing is the current version of the document as in use by RailCorp. RailCorp accepts no liability whatsoever in relation to the use of this document by any party, and RailCorp excludes any liability which arises in any manner by the use of this document. Copyright The information in this document is protected by Copyright and no part of this document may be reproduced, altered,stored or transmitted by any person without the prior consent of RailCorp.
3.1 AUSTRALIAN STANDARDS ............................................................................................................ 43.2 INTERNATIONAL STANDARDS........................................................................................................ 53.3 OTHER DOCUMENTS.................................................................................................................... 5
4 ABBREVIATIONS AND DEFINITIONS........................................................................................... 5
5 GENERAL REQUIREMENTS.......................................................................................................... 6
5.1 CABLE CONSTRUCTION................................................................................................................ 65.2 STOCK STANDARD CABLE............................................................................................................ 65.3 OPTICAL CHARACTERISTICS......................................................................................................... 75.4 CABLE ELEMENT REQUIREMENTS................................................................................................. 85.5 MECHANICAL AND ENVIRONMENTAL............................................................................................ 115.6 CABLE MARKING ....................................................................................................................... 13
6 PACKAGING AND DELIVERY ..................................................................................................... 13
1 Purpose The purpose of this document is to specify the technical requirements for Single Mode Optical Fibre (SMOF) cable, hereafter referred to as “the Cable”.
The Cable is required for carriage of telecommunications services by way of optical transmissions over distances ranging from a few metres to over 100 kilometres. The cable is to be suitable for operation in the general rail environment including areas electrified with 1500V DC or High Voltage AC and locations where fire and life safety are an issue.
2 Scope & Application The scope of this document includes SMOF Cable with construction suited to the following installations:
• General Installation - Cable suitable for general installation in the rail environment by way of direct burial, hauling into underground ducts, hauling into above ground steel troughing and laying in ground level concrete troughing.
• Fire Safe - Cable for installation in underground stations or other underground facilities and tunnels where fire and safety are a primary concern.
• Blown Cable - Cable for installation by way of air/gas blowing through continuous conduits.
The scope of this specification does not include the following optical fibre cables:
• Multi Mode Optical Fibre
• Aerial Cable - (Aerial SMOF may be included in a later revision of this specification or a separate specification in future.)
• Fire Resistant - (Fire Resistant SMOF may be included in a later revision of this specification or a separate specification in future.)
• Internal use building horizontal and riser cable
• Pre-terminated SMOF tie cables - (These are the subject of a separate specification).
This specification is applicable to both procurement and type approval assessment of the Cable
3 Reference Documents 3.1 Australian Standards
AS 2706 Numerical values – Rounding and interpretation of limiting values
AS 1049 Telecommunications cables – Insulation, sheath and jacket
AS/NZS 1660.5.2
Test methods for electric cables, cords and conductors - Fire tests - Measurement of smoke density of cables burning under defined conditions
AS/NZS 1660.5.3
Test methods for electric cables, cords and conductors - Fire tests - Determination of the amount of halogen acid gas evolved during the combustion of polymeric materials taken from cables
AS/NZS 1660.5.4
Test methods for electric cables, cords and conductors - Fire tests - Determination of degree of acidity of gases evolved during the combustion of materials taken from electric cables by measuring pH and conductivity
5.1.1 The Cable shall incorporate an inner core comprising an inner cable sheath containing the following elements:
a) A central strength member.
b) The specified quantity of SMOF cores which shall generally be Single Mode Low Water Peak fibres meeting ITU-T Recommendation G652.D.
c) The specified quantity of additional SMOF Non-Zero Dispersion Shifted fibres meeting ITU-T Recommendation G655.
d) Loose tubes containing either 6 or 12 fibres per tube.
e) Solid fillers replacing loose tubes where there are less than the full cable capacity of fibres is required.
f) Core Blocking. (to prevent the migration of water along the cable core)
g) A black polyethylene inner sheath.
5.1.2 The Cable inner core may contain other wrapping or strengthening elements designed to improve cable performance subject to full details being supplied for RailCorp engineering assessment and acceptance.
5.1.3 General Installation cable shall incorporate the following outer sheath elements:
a) An insect resistant jacket
b) A rodent resistant layer
c) A polyethylene outer sheath
5.1.4 Fire Safe cable shall incorporate the following outer sheath elements:
a) An insect resistant jacket
b) A rodent resistant layer
c) A Low Smoke, Fire Retardant, Zero Halogen outer sheath
5.1.5 Blown cable shall incorporate the following outer sheath elements:
a) An insect resistant jacket as the outer sheath
5.1.6 The Cable shall not contain any metallic or electrically conductive elements.
5.1.7 The Cable shall not contain any multi mode optical fibre.
5.2 Stock Standard Cable
5.2.1 The Cable shall be offered and supplied in stock standard cable sizes and configurations as follows:
Item Description (SMOF is G.652.D unless specified otherwise)
a) 12 SMOF General Installation
b) 12 SMOF Fire Safe
c) 24 SMOF General Installation
d) 24 SMOF Fire Safe
e) 48 SMOF General Installation
f) 48 SMOF Fire Safe
g) 72 SMOF 12 G655 + 60 G.652.D General Installation
h) 72 SMOF 12 G655 + 60 G.652.D Fire Safe
i) 72 SMOF 12 G655 + 60 G.652.D Blown
j) 96 SMOF General Installation
k) 96 SMOF Fire Safe
l) 96 SMOF Blown
m) 96 SMOF 24 G655 + 72 G.652.D General Installation
n) 96 SMOF 24 G655 + 72 G.652.D Fire Safe
o) 96 SMOF 24 G655 + 72 G.652.D Blown
p) 144 SMOF General Installation
q) 144 SMOF Fire Safe
r) 240 SMOF 24 G655 + 216 G.652.D Fire Safe
5.2.2 Cable sizes and configurations other than stock standard may be used only where required to meet a particular engineering design approved by the owner of this specification or delegated approval authority.
5.3 Optical Characteristics
5.3.1 Fibres within the cable shall meet the optical characteristic requirements tabled below:
TABLE A
OPTICAL FIBRE REQUIREMENTS
Parameter
Fibre Type and Characteristics
Single Mode
Low Water Peak (LWP)
Single Mode
Non-Zero Dispersion Shifted (NZDS)
A1 Standards / references AS/NZS 3080 – OS1
ITU-T Rec. G652.D
IEC 60793-2 type B1.3
ITU-T Rec. G655
IEC 60793-2 type B1.4
A3 Mode Field Diameter 9.2 ± 0.5 μm at 1310nm Nom 8.4 ~ 9.6 ± 0.6µm
a) 250 um, uv-cured acrylate coated, high purity silicon dioxide glass with suitably doped core and to the optical characteristics in Table A.
b) Individually and indelibly coloured in accordance with EIA/TIA-598-C “Optical Fibre Cable Colour Coding” and in the sequence of Blue, Orange, Green, Brown, Grey, White, Red, Black, Yellow, Violet, Pink and Aqua.
c) Suitable for fusion splicing
d) Continuous, unjointed and un-spliced through the entire length of any cable drum supplied
B3 Central Strength Member
The central strength member shall be:
a) Made of fibreglass-reinforced plastic (FRP)
b) Sheathed where appropriate to increase the diameter to accommodate the number of tubes required.
B4 Loose Tubes The loose tubes shall be:
a) Made of polybutylene terephthalate (PBT) or equivalent material
b) Individually and indelibly coloured in accordance with EIA/TIA-598-C “Optical Fibre Cable Colour Coding” and in the sequence of Blue, Orange, Green, Brown, Grey, White, Red, Black, Yellow, Violet, Pink & Aqua
c) Contain 6 fibres for cables containing up to 48 fibres
d) Contain 12 fibres for cables containing more than 48 fibres
e) Contain one grade of fibre only in each tube where different grades of single-mode fibre are incorporated into a cable
f) Have a sequence of priority in populating the tubes with G655 in the first tube(s) where different grades of single-mode fibre are incorporated into a cable
g) “S-Z” stranded (oscillated) around the central strength member
B5 Tube Filling Compound
The buffer tube shall be fully water-blocked with thixotropic jelly or equivalent material, having a drop point of ≥ 80°C.
B8 Fillers Fillers shall be:
a) Used where less than the full cable’s capacity of fibres is required
b) Solid and of the same diameter as the tubes
c) Placed in sequence after the last tube and before first.
B9 Core Blocking Core blocking shall:
a) Fully water-block the inner cable core
b) Preferably use “dry block” technology with such materials as tapes, yarns or equivalent, loaded with super absorbent polymers.
a) Made of materials suitable for use in underground locations where fire and life safety are an issue
b) Of appropriate thickness to meet the requirements of this specification
c) Meet the requirements of AS 1049 as being suitable for external protected applications
d) Sufficiently high in density to allow the cable glide smoothly through ducts and across other cables while not producing excessive drag
e) Light blue and in colour.
The Low Smoke Zero Halogen Sheath shall meet the following standards requirements:
a) Halogen content may not exceed 0.5% or 5 mg/g tested in accordance with AS/NZS 1660.5.3
b) The limit values of acidity of combustion gases are 4.3 for pH and 10 µS for conductivity tested in accordance with AS/NZS 1660.5.4
c) When tested using a 27m³ volume smoke chamber in accordance with AS/NZS 1660.5.2 the smoke emission must result in not less than 60% light transmittance.
5.5 Mechanical and Environmental
5.5.1 The Cable shall generally be designed to meet the harsh environmental conditions that are expected in the heavy railway industry with a service life of at least 40 years when correctly installed and maintained to supplier recommendations and practices.
5.5.2 Elements within the cable shall meet the Mechanical and Environmental characteristic requirements tabled below:
A representative sample of fibres to be monitored, loss variation shall not exceed 0.1dB in any fibre tested, and
No mechanical damage to cable
C5 Cable Bend IEC 60794-1-2 Method E11A
Conditions: Mandrel OD ≤ 19 x cable OD, one turn
A representative sample of fibres to be monitored, loss variation shall not exceed 0.1dB in any fibre tested, and
No buckling of cable sheath or jackets
C6 Water Penetration IEC 60794-1-2 Method F5B
Sample: 3m
Conditions: 1m head of water, 24hrs
No water shall be detected at the unsealed end of the sample.
C7
Temperature Cycling IEC 60794-1-2 Method F1
Sample: > 500m,
Conditions: 2 cycles ambient to -20oC to +70oC to ambient.
A representative sample of fibres to be monitored, loss variation shall not exceed 0.1dB in any fibre tested.
C8 Representative Samples
Representative samples of fibres to be monitored
a) Cables up to 12 fibres
b) Cables with more than 12 fibres
a) All fibres shall be monitored
b) A minimum of 12 fibres distributed evenly throughout the tubes shall be monitored, and if more than 6 tubes then 2 fibres from each tube shall be monitored.
<description> Cable description e.g. “48 SMOF - GENERAL INST.”
<MMM YYYY> Date of manufacture: month & year e.g. “SEP 2011”
<cable number> A unique cable identification number provided by the cable manufacture
<mmmm> M Sequential length mark in meters starting at zero (0000) at the inner end of the drum. e.g. 0125M
6 Packaging and Delivery
6.1.1 The Cable shall be delivered free of joints in lengths as ordered by RailCorp with both ends sealed with heat shrink end caps.
6.1.2 Where the Cable is delivered in lengths less than that ordered, RailCorp reserves the right to refuse delivery and/or payment for such lengths. All costs for shipping such lengths shall be at the supplier’s expense including any scrapping or return shipping costs.
6.1.3 Where a drum contains a length in excess of the length ordered by RailCorp, RailCorp shall only pay length that was ordered.
6.1.4 The Cable shall be delivered on drums with:
a) Durable robust construction including reinforcing battens designed to protect the Cable from damage during storage, shipping, handling, reeling and unreeling
b) Bark free timber where constructed from timber
c) Fasteners such as nails, screws and staples positioned so that they cannot damage the cables even if improperly fixed
j) Refractive index of the cabled fibre for each type of fibre used (for OTDR calibration)
7.1.4 The Cable Product Data sheet(s) shall have data clearly laid out in a manner similar to the sample shown in Appendix 1.
7.1.5 The Cable Test Sheet(s) shall include documentation as follows:
a) Product code / name
b) Cable description
c) Cable identification number as printed on the cable’s outer sheath
d) Drum and/or batch numbers
e) Tests performed
f) Test results including dates tested and tester sign off. These documented results shall include as a minimum:
• Attenuation of each fibre at the wavelength in table A section A14.
• Detail of any localised attenuation discontinuity if applicable.
• Results of any batch mechanical and environmental test if applicable.
8 Regulatory & Quality Assurance
8.1.1 The Supplier shall have a Quality Management System that is certified to ISO 9001.
8.1.2 The cable shall be produced for the Australian market and meet the requirements of AS/ACIF S008
8.1.3 The Cable shall be current production release with extensive proven field operation within Australia
8.1.4 Cable materials shall be non toxic and dermatologically safe and comply with the European Union Directive 2002/95/EC on Restriction of the use of Hazardous Substances in Electrical and Electronic Equipment (RoHS).
8.1.5 The interpretation of tolerances shall be in accordance with AS 2706
8.1.6 Prior to delivery, the cable shall be performance tested including the following mandatory tests:
a) Water Penetration Test on each batch length of cable (refer to Table C item C6)
b) Attenuation of Fibre in Finished Cable for all fibres in each drum length of cable (refer to Table A item A14)
c) Maximum Allowable Attenuation Discontinuity (Point Loss) for all fibres in each drum length of cable (refer to Table A item A15)
9.1.1 The manufacturer of the cable shall warrant that for ten years from the date of supply that the cable shall be free from all defects resulting from faulty design, faulty materials, faulty manufacturing process or poor workmanship.
9.1.2 The supplier shall be responsible for:
a) all costs associated with the replacement of cable found defective within 5 years from delivery
b) replacement of cable found defective after 5 years and within 10 years from delivery
10 Information To Be Supplied
10.1.1 The following information shall be supplied with any Request for Tender and/or for Type Approval.
a) A clause by clause statement of compliance with this specification
b) Cable Product Data Sheet(s)
c) ISO 9001 Quality Management System certification
d) AS/ACIF S008 product certification
e) A statement on the toxicological characteristics of the cable components including detail on how to freely obtain the Material Safety Data Sheet
f) Full details of the warranty offered and any condition that apply.
Appendix 1 – Sample Product Data Sheet Supplier Name/logo RailCorp Cable Product Number: ####### Product Name: ############# Product description for example: Single Mode Optical Fibre cable 144 core, rodent resistant, loose tube construction, 12 fibres per tube, Manufactured in accordance with RailCorp SPM0677 for general installation in the rail corridor. Fibres 1 to 24 - G.655 and fibres 25 to 144 - G.652d.
Loose Tubes Optical Fibres
Glass Armour Filling Gel
PE Inner Sheath Central Strength Member
PE Outer Sheath Core Wrapping and Tape
Nylon Jacket Dry Block Tapes
PE Filler
Component Materials Outside Diameter Radial Thickness Strength Member Glass Reinforced Plastic X.Xmm N/A PE Filler Medium Density Polyethylene (Black) X.Xmm X.Xmm Tubes Polybutylene Terephthalate X.Xmm X.Xmm Inner PE Sheath Medium Density Polyethylene (Black) XX.X + X.Xmm X.Xmm Nylon Jacket Nylon 12 (Blue) N/A X.Xmm Outer PE Sheath Medium Density Polyethylene (Blue) XX.X + X.Xmm X.Xmm
Physical and mechanical properties Cable mass in kg per 1000m XXX kgs Minimum bend radius at no load XXXmm Additional data + any toxicological Minimum bend radius at full load XXXmm or other warnings. Crush resistance - short term XXXkN/100mm Crush resistance - long term XXXkN/100mm e.g.Maximum allowable tensile strength XXXkN This cable is designed for Operating temperature range in °C -XX° to XX° RailCorp for general use within Any other properties XXXXX the rail corridor; it is not suitable
for underground locations or installation by blowing down small G655 - Fibres 1 - 24 (tubes 1 & 2) diameter pipes. Refractive index of cabled fibre: X.XXXX
For the Material Safety Data Sheets contact our office on (nn) nnnnnnnn