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Submarine cable

Optical fiber submarine cable
date:2014-12-30

  Product features

  Excellent optical properties and mechanical properties, it can be used for shallow / deep sea region

  High tensile strength design. There are single and double armored structures to choose from to suit different demands.

  Extruded lead sheath, so that it has more excellent water-proof performance.

  Center beam tube, Stranded loose tube structure design, single submarine cable can up to 18 km long.

  Optical fiber cores can up to 144.

  Dense design and compact bending radius make the cable easy to grip, inventory and installation.

  Structure schematic diagram

  Strengthening core

  Possible filled bar

  Cable paste filler

  Colored fiber

  Loose tube

  Water-proof inner layer

  Inner steel wire

  Inner PE sheath

  Extruded lead sheath

  Outer PE sheath

  Double steel wire

  Outer sheath

  Main technical performance parameters

Serial number Property name Unit Performance index
1 Attenuation at 1310nm  at 1550nm dB/km ≤0.36  ≤0.22
2 Dispersion ps/nm·km ≤18
3 The long term tension kN According to customer demand
4 Short term tension kN According to customer demand
5 Permitted minimum bending radius mm 30 times the diameter of the fiber
6 Work and storage temperature - -30~+60

  Submarine power cable with three cores (optical fiber composite cable)/HYJQ41 HEQ41 (HYJQ41+OFC HEQ41+OFC)26/35kV

Conductor cross-section
mm2
Screen cross-section
mm2
Conductor resistance
DC20℃Ω/km
Conductor resistance
AC90℃Ω/km
Capacitance uF/km Inductance
mH/km
Ratings reference A
 
Conductor temperature of 90 ℃, a second short-circuit current KA
XLPE EPR “J”pipe
 
Buried
 
conducto
 
screen
 
50 137 0.387 0.4936 0.1150 0.1507 0.4018 180 175 7.31 4.0
70 143 0.268 0.3420 0.1263 0.1655 0.3865 220 215 10.2 4.2
95 150 0.193 0.2465 0.1368 0.1793 0.3735 270 255 13.6 4.4
120 155 0.153 0.1966 0.1460 0.1913 0.3637 310 300 17.2 4.5
150 161 0.124 0.1587 0.1563 0.2048 0.3540 355 335 21.5 4.7
185 167 0.0991 0.1271 0.1665 0.2182 0.3456 400 375 26.5 4.9
240 175 0.0754 0.0971 0.1805 0.2365 0.3365 460 430 34.5 5.2
300 215 0.0601 0.0778 0.1945 0.2548 0.3280 525 480 42.9 6.3
400 229 0.0470 0.0614 0.2146 0.2812 0.3256 615 550 57.2 6.7

  Note: Shield is the lead sheath Condition: Conductor without coating, single loop, Buried in soil, Conductor working temperature of 90 degrees Celsius, the soil temperature of 25 degrees Celsius, the soil resistance 1.0k.m/W, parallel laying, laying spacing is 2 times of the cable diameter, laying depth 1 meters Tube ambient temperature 40 degrees celsius.

  The single core 110kvHYJQ41 submarine power cable

Conductor cross section
mm2
Shielding section
mm2
Conductor resistance
DC20℃Ω/km
Conductor resistance
AC90℃Ω/km
Capacitance
uF/km
Inductance
mH/km
Reference value of load flowA
 
The conductor temperature90℃,1 seconds short circuit currentkA
 
XLPE EPR “J”Tube
 
Buried
 
Conductor
 
Shield
 
240 540 0.0754 0.0968 0.130 0.171 0.6720 370 333 34.5 15.9
300 559 0.0601 0.0781 0.141 0.185 0.6497 425 381 42.9 16.5
400 590 0.0470 0.0615 0.162 0.213 0.6210 490 432 57.2 17.5
500 607 0.0366 0.0485 0.182 0.239 0.5988 570 495 71.5 17.9
630 650 0.0283 0.0385 0.201 0.265 0.5733 655 561 90.1 19.2
800 708 0.0221 0.0310 0.224 0.295 0.5478 795 654 114 20.9
1000 799 0.0176 0.0260 0.252 0.331 0.5255 900 735 143 23.5
1200 860 0.0151 0.0233 0.268 0.352 0.4969 985 792 172 25.3
1400 925 0.0129 0.0185 0.282 0.370 0.4873 1075 849 200 27.3
1600 986 0.0113 0.0163 0.295 0.287 0.4778 1150 903 229 29.1

  Note: Shield is the lead sheath Condition: Conductor without coating, single loop, Buried in soil, Conductor working temperature of 90 degrees Celsius, the soil temperature of 25 degrees Celsius, the soil resistance 1.0k.m/W, parallel laying, laying spacing is 2 times of the cable diameter, laying depth 1 meters Tube ambient temperature 40 degrees celsius.

  Transportation, installation and Application

  1, cable package adopts roller or tray form, according to the cable voltage grades, specifications and delivery length selection.

  2, attention should be paid to prevent the collision, the cable is too small bend in the transportation and the laying of the construction process, so as to avoid damage to the cable.

  3, in the transport of the cable laying, and use of the process, the end head of a reliable seal, preventing water from entering the cable core, affect the service life of the cable.

  Installation preparation

  Geological structure with detection cable laying on the path that shall be before laying the cable, the cable laying on the path of exposed bedrock, rapids and other destructive geological structure of cable, cable to take protective measures to cope with the appropriate.

  The cables should be checked before shipment cable package has no damage, cable whether mechanical damage; shipment shall check the cable insulation resistance, capacitance, Conductor resistance, lead sheathed resistance electric performance is good, whether to meet the requirements of optical fiber Attenuation.

  The press cable end lead sealing requirements for sealing and installation of cable traction head.

  The prepared cables and cable sealing cutting tool material and tool.

  The cable laying

  All kinds of mechanical operation by laying - check before laying is normal, the electric equipment is safe and reliable, if any abnormal situation should immediately rule out.

  The laying machine reel diameter and into the water wheel diameter shall not be less than 3 meters.

  The laying of cables under lateral pressure is not more than 300kg/m.

  The cable shall not exceed the maximum recommended pressure.

  Should deviate from the regular measurement of laying cable routing - range with a predetermined laying process, modified at any time, to ensure the cable cast in the selected routing.

  The suggestion of draw cable laying routing topographic map, laying process should always correcting cable ship position, and note the position after the cable laying, and pay attention to laying tension, into the water after the release, cable length, laying distance at any time to proofread the adjustment. As far as possible to avoid the cable tight cast in Yu Hai (cable suspended form the suspension state become cable local severe wear of the premises) and too loose (forming tendency to twist), to keep a little tension cable laying process, according to the different water depth, speed to change the water entry angle. Suggested step when the cable water entry angle control in 50 ~ 60 degrees.

  The installation is installed, should send divers to check whether there is cable along the cable twisting, if twisting, it must be the twisting part straightened.

  The cable laying the minimum bending radius: 20 times the single core cable should not less than 15 times of cable diameter; three core cable should not less than the diameter of the cable.

  The cable performance test and acceptance

  The cable laying after finish, performance testing deal with cable, including the insulation resistance, capacitance, Conductor resistance, lead sheathed resistance, fiber Attenuation.

  The press mounting process requires the installation of cable terminal and cable terminal. After the installation of the entire system response test.

  The handover test of cable, including DC withstand voltage test, insulation resistance test.

  The use of characteristics

  The cable long-term operating temperature (i.e. cable conductive wire core work long-term temperature allowed) shall not be more than 90 DEG C, short-term overload temperature shall not exceed 130 DEG C, short-circuit temperature not exceeding 250 degrees, the maximum duration of short circuit should not exceed 5 seconds.

  The single core armored cable with reduced magnetic loss structure.

  Crosslinked polyethylene I company can also be based on user demand for design and production of other types of insulated submarine cable.

  Correction coefficient of carrying capacity

  Different environment temperature download traffic influence coefficient (35kV and below)

Conductor Working temperature℃ The temperature of the environment℃(In soil)
10 15 20 25 30 35
90 1.11 1.07 1.04 1.00 0.96 0.92

  Different environment temperature download traffic influence coefficient(110~220kv)

Conductor Working temperature℃ The temperature of the environment℃(In soil)
10 15 20 25 30 35 40 45
90 1.07 1.03 1.00 0.96 0.93 0.89 0.84 0.8

  The coefficient of air temperature on the impact of load flow (35kV and below)

The air temperature℃ 10 15 20 25 30 35 40 45 50
Influence coefficient 1.26 1.22 1.18 1.14 1.09 1.04 1.00 0.94 0.89

  The coefficient of air temperature on the load flow effect(110~220kv)

The air temperature℃ 5 10 15 20 25 30 35 40 45 50 55
Influence coefficient 1.24 1.21 1.16 1.13 1.08 1.04 1.00 0.95 0.90 0.85 0.80

  Effects of different load flow coefficient of soil resistance coefficient (35kV and below)

Voltage(kv)
 
Sectionmm²
 
The soil resistance coefficient(K,m/W)
0.8 1.0 1.2 1.5 2.0
6/10-2/15 50-50
≥185
1.06 1.00 0.94 0.88 0.79
1.07 1.00 0.93 0.86 0.77
12/20-6/35 ≤95
≥120
1.05 1.00 0.95 0.90 0.82
1.06 1.00 0.94 0.83 0.80

  Effects of different load flow coefficient of soil resistance coefficient(110~220kv)

Thermal resistance coefficient k.m/W 0.7 1.0 1.2 1.5 2.0 2.5 3.0
Influence coefficient 1.14 1.00 0.93 0.84 0.74 0.67 0.61

  Effect of Buried on load flow depth

Laying depthm 0.50 0.70 0.90 1.00 1.20 1.50
Influence coefficient 1.10 1.05 1.01 1.00 0.98 0.95

  Effects of single loop laying spacing on load flow(110~220kv)

Laying spacing mm D D+70 200 250 300 350 400 Note: D is the diameter of the cable
Influence coefficient 0.93 1.00 1.03 1.05 1.07 1.08 1.10

  Note: the above parameters, because the cable under the sea environment is superior, so according to determine land conditions.

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