ZHONGTIAN TECHNOLOGIES CO., LTD.
ZHONGTIAN HITACHI FIBER OPTI C CABLE CO., LTD.
Company Profile
Zhongtian Hitachi Optic Fiber Cable Co., Ltd is a joint venture
invested by Jiangsu Zhongtian Technologies Co., Ltd (SSE Code:
600522) and Hitachi Electric Wire Co., Ltd. The company was
established on May 13, 2000 with 5 million USD original capital. In
2005, two shareholders increased the capital to 9 million USD, and
now the total investment of the company is 25 million USD. Our
companys headquarter is located in Shanghai Baoding Business
Building, and the manufacturing factory stands in Rudong County. The company specializes in manufacturing
and producing OPGW of the
first-class level in the world. And we still keep consummating our after service.
Now we have the capacity of manufacturing 23,000km OPGW annually. The new generation composite
stainless steel tube OPGW has passed the product appraisal organized by the National Electric Power
Company and the National Bureau of Mechanical Industry on December 23, 2000. The company has got the
Network Access License for Special Telecommunication Equipment in Electric Power System. Besides that,
we have passed the ISO9001:2000 Quality System Certificates and ISO14001:1996 Environmental System
Certificates.
Layer Welding Line for Stainless Steel Tube Fiber Unit
Page 1
Cabling Line for OPGW
Company Certificates
Page 2
Design of Optical Fiber Unit
Fiber Types and Properties
OP-Unit Types
Fiber Type
Items
ITU-T G.652 Fiber(B1)
ITU-T G.655 Fiber(B4)
1310nm
9.20.4m
1550nm
10.40. 8m
9.60.4m
Cladding diameter
1251m
1251m
Cladding non-circularity
1%
1%
Proof test strength
0.69GPa
0.69GPa
Cut-off wavelength (cc)
1260nm
1480nm
1310nm
0.36dB/km
1550nm
0.22dB/km
0.22dB/km
Zero-dispersion wavelength
1300~1324nm
Zero-dispersion slope
0.092ps/nm2.km
Mode field diameter
Attenuation
Dispersion
1~6 ps/nm2.km
3.5 ps/nm .km
1285~1330nm
1550nm1530~1565nm
18 ps/nm .km
SUS OP-Unit
SUSP OP-Unit
Note: various types of stainless-steel tube are available as required.
Stainless Loose Tube Optical Fiber Unit Characteristics
Stainless tube provides higher modulus of elasticity, crush and impact resistance.
Jelly filler prevents moisture or water penetration and providing good temperature characteristics.
Better conducting heat, bigger specific heat volume and strength stability in high temperature.
Design bigger fiber excess length, provide bigger stress-strain windows.
Composite Stainless Loose Tube Optical Fiber Unit Characteristics
Ideally combine the well-rounded optical fiber second-coating technology with the advanced laserwelding
stainless tube .
Stainless tube with inner lining-effectively protects fibers from mechanical damage, such defects as burr,
sawtooth formed during laser welding.
Stainless tube, with inner lining tube, forms an organic whole with high strength adhesive, thereby has
effective heat insulation for optical fibers.
Fiber excess length has more uniformity and better consistency. The SUSP stainless tube needs no cold
drawing, therefore the fiber excess length is effectively controlled.
Totally waterproof structure can eliminate H2 damaged effect of moisture penetration.
Page 3
Design of OPGW Cable
Fiber Excess Length Sketch Figure
Central Stainless Tube Type OPGW
Layer Stranding Stainless Tube Type OPGW
Pulling
Shrinking
Primary Fiber Excess Length
Second Fiber Excess Length
OPGW and Optical Fiber Stress-strain Curve
Page 4
Central Stainless Tube Type
Code of products
OGPW - X C 1 / XX (XX / XX XX)
Cable type
Short-circuit current capacity
Layer number of armoring wire
Central tube type
Central tube type
Cross-section area of Al clad steel wire
Number of stainless tube
Cross-section area of Al-alloy wire
Fiber number and type
Applications
Replace existing aerial ground wires, upgrading communications lines of power systems.
Synchronously plan and design with ground wire when new aerial power lines are to be constructed.
Provide stainless tube fiber unit with optimal protection.
Conduct fault short-circuit current and providing lightning protection.
Structure Characteristics
Small cable diameter, light weight, low additional load to poles/towers.
The stainless steel tube fiber unit stands in the center of the strand layer.
Obtain appropriate fiber excess length (primary) within stainless tube.
With single armoring, the OPGW has a bit poor flexure and crush resistance, and a bit poor tensile
strength.
Obtaining the best balance of electric and mechanic performance by adjusting AA/AS Combination
Note: Multi-layer armoring is available as required.
SUS or SUSP OP-Unit is available as required.
Product Structure
OP-Unit
Stainless tube
Al-clad steel or Al-alloy wire
Al-clad steel wire
Al-clad steel wire
OP-Unit
Page 5
Layer Stranding Stainless Steel Tube Type
Code of products
OPGWX Sn / XX (XX/XX XX)
Cable Type
Short-circuit current capacity
Layer number of armoring wire
Cross-section area of Al clad steel wire
Layer stranding type
Cross-section area of Al-alloy steel wire
Number of Stainless tube
Fiber number and type
Applications
Replace existing aerial ground wires, upgrading communication lines of power systems
Synchronous plan and design with ground wire when new aerial power lines are to be constructed
Provide stainless tube fiber unit with optimal protection
Conduct large fault short-circuit current and providing lightning protection
Suitable for application in high fiber count and super-high-voltage power lines
Match with favorable tension-sag of the diffluent ground wire.
Structure Characteristics
Typically have larger cable diameter.
The stainless steel tube fiber unit is placed in an eccentric position and stranded together with Al-clad
steel wires or Al-alloy wires simultaneously.
The Al-clad steel wires being placed in the inner layer can avoid rusting, and have high reliability and long
life.
Optimum stranding design makes secondary fiber excess length available.
Good flexure and crush resistance.
Provide high mechanical strength and large short-circuit current capacity.
Obtain the best balance of electric and mechanic performance by adjusting AA/AS combination.
Note: Multi layer armoring is available as required
SUS or SUSP OP-Unit is available as required
Al-alloy wire
OP-Unit
Al-clad steel wire
Al-alloy wire
Al-alloy wire
OP-Unit
Al-clad steel wire
Al-clad steel wire
Page 6
Central Sealed Al-covered Stainless Tube Type
Features and advantages
Extremely good corrosion resistance.
Improved lightning resistance and fault current.
Double tube design offers better resistance of the optical fiber from moisture and horizontal fluid
penetration resistance.
Small diameter, light weight, compact design.
No anticorrosion grease, clean environment, longer life.
Applications
Extremely corrosion areas, such as littoral, chemical areas
High lightning areapossible to still have relatively small overall diameter when using wires of bigger
diameter on the outer layer
Product Structure
The optical fibers loosely places in a
hermetically sealed Al-covered stainless tube
unit.
Single or multi layer AS and AA wires are
stranded together around the central Al-covered
stainless tube.
Type Test
The type test according to the latest IEEE 1138
and DL/T 832 was successfully completed by EPCRI
AA wire
AS wire
AS wire
SUS
Fibers & gel
Fibers & gel
Al-tube
Al-tube
SUS
Engineering Application
2005.5 ---40km OPGW ---220kV Nanhua Caofeidian Tran. Line of Tangshan Supply Power Company
2005.11---3.4km OGPW---EXPORTING TO South Africa G.D.S.A Company
2005.11---8.8km OPGW---110kV Jinshang-baogai Trans. Line of Fujian Shishi Supply Power Co.
Specifications
Typical Parameter
Unit
OPGW-73
OPGW-81
OPGW-83
OPGW-95
OPGW-109
Max. number of fiber
Nos
24
24
36
36
48
Overall diameter
Mm
11.4
12.0
12.2
13.0
14.0
Standard weight
Kg/km
390
430
415
500
580
Rated tensile strength
kN
58
66
77
Fault current capacity
35
56
Page 7 47
54
48
65
86
KA .s
Compressed Layer Wires Lightning Resistant Type
Features and Advantages
Lightning resistance is extremely improved.
Reduce inner layer diameter, extremely increase outer layer
wires diameter.
Compact design, full use of cross-section.
Available for central structure, single or multi layer stranding
wires application.
Application
High lightning area-possible to use wires of bigger diameter
on the outer layer and still have relatively small overall
diameter.
High pluviose, iced area.
Product Structure
OP-unit places in the center of the cable. The inner layer
wires are compressed to smooth body, conductivity
30-40%.
SUS
Fiber & gel
AS Wire/SB
AS Wire/SB
As wires of the outer layer may be smooth or round, a
combination of AS and AA wires is applied in the outer layer.
SUS
Type Test
Fiber & gel
AS Wire/SB
The type test according to the latest IEEE 1138 and DL/T
832 has been successfully completed.
AS Wire/Round
Specifications
Conventional Round wire stranding
Compressed Wires Lightning Resistance
type
type
Structure Drawing
Outer layer
Nos/mm
27AS 13/3.0
27AS 9/4.0
Inner layer
Nos/mm
30AS 6/3.5 + SUS 1/3.2
30AS 6/ SB 2.3
Center
Nos/mm
30AS 1/3.5
SUS 1/3.4
Max. number of fibers
Nos
36
36
Overall diameter
mm
16.0
16.0
Standard weight
kg/km
850
840
Rated tensile strength
kN
137
137
Fault current capacity
kA .s
146
152
Lightning resistant
150-200
250-300
Structure
Page 8
Reference Standard
Optical Fiber Cable
IEC 61089
IEC 60794-4-1
IEEE std 1138
Round wire concentric lay overhead electrical stranded conductors
The fourth section of optical fiber cable: Optical fiber composite overhead ground wire
IEEE Standard construction of optical fiber composite overhead ground wire(OGPW)
for use on electric utility power lines
DL/T 832-2003
GB/T 7424-2003
Optical fiber composite overhead ground wire
The fourth section of optical fiber cable: The criterion divided
Optical fiber composite overhead ground wire
Raw Material
ITU G. 652~G. 655
ASTM B415-1998
JB/T 8134-1997
Characteristics of single modefibers
Standard for hard drawing Al-clad steel wire
Al-Mg-Si series alloy round wires used for the spanning overhead stranding wires
(idt IEC 60104-1997)
DIN 48200 T8
DIN 48200 T6
IEC 61394
GB/T 9771
GB/T 15972
GB/T 17937-1999
Al-clad steel wires materials criterion
Al alloy wires materials criterion
Overhead lines-characteristics of greases for Al, Al alloy and steel bare conductors
Single mode optical fiber series for communication
Optical fiber general criterion (eqv IEC 60793-1)
Al-clad steel wires used by electricians (idt IEC 61232)
Fitting & Accessories
GB/T 34314-1997
DL/T 766-2003
Metal tools for the electric power
The technology conditions and the trial method of the performing fitting using
Optical fiber composite overhead ground wire (OPGW)
Scientific Tests and Authoritative Qualification
Page 9
Type Test Table
Test Item
Optical
test
fiber
Test Standard
chrematistics
IEC 60793, ITU-T
G652, ITU-T G655
IEC 61232
IEC 60104
Stranding wire test
Stress-strain,
Tensile strength test
Crush, impact test
Water penetration test
Seepage
compound
of
Laboratory
flooding
Temperature cycling
Sheave test
Aeolian vibration test
IEC 60794
IEEE 1138
DL/T 832-2003
GB/T 7424.4-2003
Galloping test
Creep test
Circuit test
Lightning arc test
Salt spray corrosion test
Page 10
Shanghai Electric Cable Research Institute
China National Electric Power Construction
Research Institute
China Electric Power Research Institute
Wuhan High Voltage Research Institute
China Ministry of Information Industry
Hitachi Electric Wires, Japan
America PLP Laboratory
Canada Kinectrics Laboratory
Poland Natio nal Electric Jen Laboratory
Test Data and Chart
Short Circuit Test (Tested by Kinectrics Laboratory, Canada)
Typical Set-up for Short Circuit
Test in High Current Yard
Typical Installation of Thermocouple
on Temperature Sample
Test Chart
Page 11
Test Data and Chart
Lightning Arc Test (Tested by Kinectrics Laboratory, Canada)
Typical set-up of electrode, fuse-wire
and Cable before Lightning Arc
Lightning Arc #P1 Damage
Lightning Arc #P1 Damage (+245C)
Summary of Results of Lightning Arc Test
Test NO.
Initial Temp
Initial Tension
Mean Current of
()
(kgf)
Component B
(kA)
Charge
Change of Attn
(C)
(dB)
Remaining RTS
N1
44
801
2.28
197
0.0
93%
N2
39
801
2.26
146
0.0
98%
N3
40
816
2.12
165
0.0
86%
N4
44
811
2.14
142
0.0
97%
N5
37.5
812
2.10
136
0.0
85%
P1
35
786
245
0.0
99%
P2
39
789
257
0.0
P3
41
780
247
0.0
87%
P4
43
832
259
0.0
75%
P5
45
793
249
0.0
95%
Page 12
Perfect Service
OPGW Primary Design Service
If you require quote of ZTT OPGW, please supply us the following information so that we can provide the
best services.
km
OPGW length:
Type of diffluence ground wire:
; G.655
Numbers of fiber: G.652
OPGW diameter:
mm
OPGW RTS:
kN
Max. Short-circuit current:
kA
s
Lasting time of short-circuit:
o
Weather Temperature:
Max. Wind speed:
m/s
Max. Ice thickness:
mm
Customer contact:
Name:
Company:
Fax:
Tel:
Totally Mid-sales Services
Tension-sag calculation
Matching plate
Fitting and vibration design
Technological discussion
Contacting meeting of design and factory checking
Technological training and seminar
Perfect Post-sales Services
Opening drum measurement
Acceptance of the fittings & accessories
Construction training and supervising
Start the installation system and test when the project is
finished
Responses visiting users
Page 13
