Optical Fiber (OM3)
Spec No.: ZTT 23-XJ31797
TECHNICAL SPECIFICATION
ZTT® Skygrid™ OPGW
November 8,
A Linda Lemon Felix
2023
Version Date Prepared Reviewed Approved
Address: No. 88 Qixin Road, NETDA, Nantong, Jiangsu, P.R. China, 226009
Tel:+86 513 8010 0986 ▏ E-mail: sales@zttcable.com ▏ Website: www.zttcable.com
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1. General
1.1 SCOPE
This specification covers ZTT® SkygridTM OPGW for the installation on high voltage overhead
power lines. The cable contains optical fibers for data transmission and telecom purposes and is
installed instead of a ground wire.
The specification describes the basic design of ZTT® SkygridTM OPGW with its main components:
the fibers, the optical fiber unit and the cable armoring. Furthermore, this specification contains
information concerning the quality assurance during manufacturing, the final acceptance tests,
the type tests and the packaging.
1.2 Cable Description
Cable which has the dual performance functions of a conventional ground wire with
telecommunication capabilities.
1.3 Quality
ZTT ensures a continuing level of quality in our cable products through several quality control
programs including ISO 9001.
1.4 Reliability
ZTT ensures product reliability through rigorous qualification testing of each product family. Both
initial and periodic qualification testing are performed to assure the cable's performance and
durability in the field environments.
1.5 Reference
The cable which ZTT offered are designed, manufactured and tested according to international
standards as follows:
IEC 60793-1 Optical fiber Part 1: Generic specifications
IEC 60793-2 Optical fiber Part 2: Product specifications
ITU-T G.652 Characteristics of a single-mode optical fiber cable
Characteristics of a non-zero dispersion-shifted single-mode optical
ITU-T G.655
fiber and cable
EIA/TIA 598 Color code of fiber optic cables
Aerial optical cables along electrical
IEC 60794-4-10
power lines – Family specification for OPGW
Optical fiber cables-Part 1-2: Generic specification-Basic optical cable
IEC 60794-1-2
test procedures
IEEE Standard for testing and performance for optical ground wire
IEEE1138-2021
(OPGW) for use on electric utility power lines
Conductors for overhead lines-Coated or cladded metallic wire for
IEC 63248
concentric lay stranded conductors
Conductors for overhead lines-Aluminum and aluminum alloy wires for
IEC 62641
concentric lay stranded conductors
IEC 61089 Round wire concentric lay overhead electrical stranded conductors
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2. Optical Fiber
The optical fiber is made of high pure silica and germanium doped silica. UV curable acrylate
material is applied over fiber cladding as optical fiber primary protective coating. The detail data
of optical fiber performance are shown in the following table.
Optical fiber uses special spun device successfully controlled the value of PMD, and makes sure
that it can keep stable in cabling.
ZTT-ALF® G652 Optical Fiber
Specifications
Category Description
After cabling
Attenuation @1310 nm ≤0.35 dB/km
Attenuation @1550 nm ≤0.22 dB/km
Zero Dispersion Wavelength 1300~1324 nm
Zero Dispersion Slope 0.073~0.092 ps/nm2∙km
Optical
Specifications PMD Link value ≤0.1 ps/√km
Cable Cutoff Wavelength (λcc) ≤1260 nm
Macro bending Loss
(100 turns; Ф50 mm) @1550 nm ≤ 0.05 dB
(100 turns; Ф50 mm) @1625 nm ≤ 0.10 dB
Mode Field Diameter @1310 nm 9.2±0.4μm
Cladding Diameter 125 ±0.7μm
Dimensional
Core/clad concentricity error ≤0.5μm
Specifications
Cladding Non-Circularity ≤0.7%
Mechanical
Proof stress ≥0.69Gpa
Specifications
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3. Cable Structural Drawing
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4. Color Identification of Fiber in ZTT® SkygridTM OPGW
Color code of fiber in OPGW shall be identified referring to the following table:
Typical number of fiber:48
Remark Fiber No. & Color
1 2 3 4 5 6
Blue Orange Green Brown Gray White
Without Color Ring
7 8 9 10 11 12
Red Nature Yellow Violet Pink Aqua
13 14 15 16 17 18
With S150 Color Blue Orange Green Brown Gray White
Ring 19 20 21 22 23 24
Red Nature Yellow Violet Pink Aqua
25 26 27 28 29 30
Blue Orange Green Brown Gray White
With S90 Color Ring
31 32 33 34 35 36
Red Nature Yellow Violet Pink Aqua
37 38 39 40 41 42
Blue Orange Green Brown Gray White
With S60 Color Ring
43 44 45 46 47 48
Red Nature Yellow Violet Pink Aqua
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5. Packing and Drum
OPGW shall be wound round a non-returnable wooden drum or iron-wooden drum. Both ends of
OPGW shall be securely fastened to drum and sealed with a shrinkable cap. The required
marking shall be printed with a weatherproof material on the outsides of drum according to
customer’s requirement.
D
d
b
B A
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Drum Dimensions & Weights
Cable Diameter Drum Length
D b B d A weight
(mm) (m)
cm cm cm cm cm kg
2000 120 90 110 80 10.5±0.5 150
3000 120 90 110 80 10.5±0.5 150
11.0-11.5
4000 130 90 110 80 10.5±0.5 160
5000 140 90 110 80 10.5±0.5 170
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