TECHNICAL SPECIFICATION Cable Specification No.: KGST-2002-014 OPTICAL FIBRE CABLE LOOSE TUBE / JELLY FILLED DOUBLE JACKET / SINGLE ARMORED LTD ARM CABLE... 1.2 Cable Description 1 Je
Trang 1TECHNICAL SPECIFICATION
Cable Specification No.: KGST-2002-014
OPTICAL FIBRE CABLE LOOSE TUBE / JELLY FILLED DOUBLE JACKET / SINGLE ARMORED
(LTD ARM CABLE)
Trang 21 SCOPE
1.1 Application
This specification covers the general requirements for fiber optic telecommunication cables used for inter-building backbone in duct, direct buried and lashed aerial installation 1.2 Cable Description
1) Jelly Filled / Double Jacket / Single Armored Rodent Protected Cable
Single and 50 or 62.5 Multi mode color coded fibers, jelly filled color coded loose tubes, PE filler (if required), water swellable yarn around the central strength member, SZ-stranded around the dielectric CSM, water swellable tape, outer strength member, inner PE jacket, water swellable tape, corrugated steel tape armor and outer PE jacket
2 OPTICAL FIBER
The optical, geometrical and mechanical performance of the optical fiber shall be in accordance with Table 1 and 2 below
Table 1 The Optical, Geometrical and Mechanical Performance of the Multi Mode Fiber
SPECIFICATION ITEMS UNITS
Attenuation dB/km ≤ 3.0 at 850nm
≤ 1.0 at 1300nm ≤ 1.0 at 1300nm ≤ 3.5 at 850nm Bandwidth MHz.km ≥ 400 at 850nm
≥ 600 at 1300nm ≥≥ 400 at 1300nm 200 at 850nm Numerical Aperture - 0.20±0.015 0.275±0.015 Core Diameter µm 50±3.0 62.5±3.0 Core Non-circularity % ≤ 6.0 ≤ 6.0
Cladding Diameter µm 125±2.0 125±2.0 Cladding Non-circularity % ≤ 2.0 ≤ 2.0
Core/Cladding Concentricity Error µm ≤ 3.0 ≤ 3.0
Coating Diameter µm 245±15 245±15 Proof Test Kpsi ≥ 100 ≥ 100
*Note) Superior performance available upon request
Trang 3Table 2 The Optical, Geometrical and Mechanical Performance of the Single Mode Fiber
Attenuation dB/km ≤ 0.4 at 1310nm
≤ 0.25 at 1550nm Chromatic Dispersion ps/nm.km ≤ 3.2 at 1285nm ~ 1330nm
≤ 18 at 1550nm Zero Dispersion Wavelength nm 1300 ~ 1324
Zero Dispersion Slope ps/nm2.km ≤ 0.093
Cut-off Wavelength
(λcc, 22m of a cabled fiber) nm ≤ 1270
Mode Field Diameter µm 9.3±1.0
Mode Field Concentricity µm ≤ 0.8
Cladding Diameter µm 125±1.0
Cladding Non-circularity % ≤ 1.0
Coating Diameter µm 245±15
Proof Test Kpsi ≥ 100
*Note) Superior performance available upon request
3 CABLE CONSTRUCTION
The construction of the cable shall be in accordance with Table 3 below
Table 3 Construction of the Cable
ITEMS DESCRIPTION
Type of Fiber Single Mode or 62.5 Multi Mode or 50 Multi Mode
Number of Fibers 2 ~ 72
No of Fibers per Tube Max 12
Material PBT (Polybutylene Terephthalate) Loose Buffer
Tube Diameter Nom 2.4mm
Filling Compound
in Loose Buffer Tube Thixotropic Jelly Compound
Material Polyethylene rods (Natural color) Filler
(if necessary) Diameter Nom 2.4mm
Central Strength Member FRP (Fiberglass Reinforced Plastic)
Water Blocking Material Water Swellable Yarn around the CSM
(To prevent the water ingress into the cable core) Core Wrapping Tape Water Swellable Tape
Trang 4Table 3 Construction of the Cable(continued)
ITEMS DESCRIPTION
Outer Strength Member Glass yarns
(To provide the required tensile strength together) Ripcord Two Ripcords (To provide easy cable entry, approx 180° separation)
Material Black HDPE or MDPE Inner Jacket
Thickness Nom 1.0mm, Min 0.7mm Water Blocking Material Water Swellable Tape
(To prevent the ingress of water) Ripcord Two Ripcords (To provide easy cable entry, approx 180° separation)
Material Steel Tape with Plastic Coating on Both Sides Armor
Thickness Nom 0.15mm (Steel Tape) Nom 0.05mm (Plastic Coating) Material Black HDPE or MDPE
Outer Jacket
Thickness Nom 1.5mm, Min 1.2mm
4 FIBER AND LOOSE BUFFER TUBE IDENTIFICATION
The color code of the loose buffer tubes and the individual fibers within each loose buffer
tube shall be in accordance with Table 4 below
Table 4 The Color Code of the Individual Fibers and Loose Tubes
No Color No Color
1 Blue 7 Red
2 Orange 8 Black
3 Green 9 Yellow
4 Brown 10 Violet
5 Gray 11 Pink
6 White 12 Aqua
Trang 55 PHYSICAL / MECHANICAL / ENVIRONMENTAL PERFORMANCE
The mechanical and environmental performance of the cable shall be in accordance with Table 5 below Unless otherwise specified, all attenuation measurements required in this section shall be performed at 1550nm for single mode fiber (SM) and at 1300nm for multi mode fiber (MM)
Table 5 The Mechanical and Environmental Performance of the Cable
ACCEPTANCE CRITERIA
Tensile Performance
# Test method: IEC 794-1-E1 - Mandrel diameter: 30D (D = cable diameter) - Tensile load: 2,700N for 1 hour
# Acceptance Criteria - Fiber strain: ≤ 0.33%
- Attenuation increment: ≤ 0.10 dB (SM)
≤ 0.20 dB (MM) for long term tensile load
Crush
# Test method: IEC 794-1 Method E3 - Applied load: 3500N/100mm - Duration of loading: 1 minute
# Acceptance Criteria - Attenuation Increment: ≤ 0.10 dB (SM)
≤ 0.20 dB (MM) after completion of the test
Impact
# Test method: IEC 794-1 Method E4 - Drop hammer mass: 1 kg
- Height of impact: 1 m - Diameter of drop hammer: 25 mm - Radius impact surface: 300 mm - No of impact per point: 1 time - No of impact points: 5 points (500mm interval)
# Acceptance Criteria - No jacket cracking and fiber breakage - Attenuation Increment: ≤ 0.10 dB (SM)
≤ 0.20 dB (MM) after completion of the test
Repeated Bending
# Test method: IEC 794-1 Method E6 - Sheave diameter: 20D (D = cable diameter) - No of flexing cycles: 30 cycles
- Flexing speed: 30 cycles/minute
# Acceptance Criteria - No jacket cracking and fiber breakage - Attenuation Increment: ≤ 0.10 dB (SM)
Trang 6Table 5 The Mechanical and Environmental Performance of the Cable (continued)
Torsion
# Test method: IEC 794-1 Method E7 - Cable length twisted: 2m
- No of twist cycles: 10 cycles - Twist angle: ± 180°
# Acceptance Criteria - No jacket cracking and fiber breakage - Attenuation Increment: ≤ 0.10 dB (SM)
≤ 0.20 dB (MM) (after completion of the test)
Temperature Cycling
# Test method: IEC 794-1 Method F1 - Temperature cycling schedule : 23°C → -30°C → 70°C → -30°C → 70°C - Soak time at each temperature: 8hours
# Acceptance Criteria - Attenuation increment: ≤ 0.15 dB/km (SM)
≤ 0.20 dB/km (MM)
Water Penetration
# Test method: IEC 794-1 Method F5 - Length of specimen: 3m
- Height of pressure head: 1m - Test time: 24 hours
# Acceptance Criteria - No leakage through the open cable end
6 PACKING AND MARKING
6.1 Cable Marking
The jacket shall be marked at intervals of one meter with following information
1) Cable type and fiber counts
2) Name of the manufacturer
3) Year of manufacture
4) Length marking
Trang 76.2 Cable Packing
6.2.1 Standard length of cable shall be 2km Other cable length is also available if requested
by customer
6.2.2 Short lengths: up to 10% of the deliveries may be shorter than standard length but never shorter than 1,000 meters
6.2.3 Each length of the cable shall be wound on a separate wooden reel
6.2.4 Both ends of the cable shall be sealed with suitable plastic caps to prevent the entry of moisture during shipping, handling and storage
6.2.5 The cable ends shall be securely fastened to the reel to prevent the cable from becoming loose in transit or during placing operations
6.2.6 The inner end of the cable is housed into a slot on the side of the reel without extra cable length for testing
6.2.7 Circumference battens or wood-fiber board shall be secured with steel bands to protect the cable during normal handling and shipping
6.3 Cable Reel
6.3.1 Details given below shall be distinctly marked with a weather proof material on both outer sides of the reel flange:
(1) Purchaser’s name
(2) Cable type and fiber counts
(3) Length of cable in meters
(4) Gross weight in kilograms
(5) Reel number
(6) Year of manufacture
(7) Name of the manufacturer
(8) Arrow showing the direction the drum shall be rolled
Other shipping mark is also available if requested by customer
6.3.2 The cable shall be shipped on reels designed to prevent damage to the cable during shipment and installation
6.3.3 The arbor holes provided in the reels shall be at least 65 mm and at most 120 mm in diameter The arbor hole on each flange shall be reinforced with a bearing plate
Trang 8< Cross-section Drawing of Cable >
1 36-fiber cable
No of Fibers Nominal Cable Diameter (mm) Approx Cable Weight (kg/km)
2 ~ 72 16.0 240
*) Actual values for cable weight and diameter may deviate from the calculated values given in the table above
== End of Specification ==
Optical Fibers
Thixotropic Jelly Compound
Loose Tubes
PE Filler
Central Strength Member
Water Swellable Yarn
Water Swellable Tape
Outer Strength Member
Ripcords
Inner PE Jacket
Water Swellable Tape
Corrugated Steel Tape
Outer PE Jacket