Page 43 - Analysis Report of Global Market in the Submarine Cable Field (2017)

The electric field distribution under the direct voltage is presented pictured and evaluated by effective means as X-ray. Depends on this
as resistant distribution.The insulating layer's distribution is closely image, we can analyze the internal size, impurities and interspace of
related,however,the electric conductivity is increase under the influence UJ joint. This data can completely recover the insulating property of
of the line input power load and the water seepage in the service submarine cable and significantly improve reliability of circuit.
environment.As you can see from the simulation result,the maximum
field intensity distribute in the copper conductor surface of the 2.2 The on-line transition technology for different cable type of
insulation.Along with the water seepage during a long term using,the submarine cable
electric field intensity is increasing around the conductor,the electric According to the different environments, submarine cable can be divided
field intensity is decreasing in the external surface of the insulation and into LW, LWP, SA, DA, etc., Generally, the internal structure (cable core)
the maximum electric field intensity can reach to 3.5kv/mm.The design of different cable types is identical on the same line. Based on the rule of
in the structure of insulation is reasonable and meet the use requirement. not damaging the cable core, factory’s on-line transition joints are the
transition of different cables types, which ensures the integrity of the
2. The intermediate connection technique of submarine fiber cable internal structure of the cable. According to the difference of routers,
In the submarine a relay information system and oceanographic network submarine cable on the same line may have DA-SA cable transition, SA-
system,it is restricted by the manufacturing length or optical attenuation LWP cable transition and LWP-LW cable transition.
and we will adapt connector box to connect submarine optical fiber
cable.Sometimes,there are exhibitions of different manufacturers because For instance, when DA-SA cable transition is happening, at first, the
in different manufacturers there are different types and structures of production of DA cable is going. When we start the online transition,
submarine optical fiber cable.So it brings some difficulties to the install the outer wire will be cut off (usually 3-4 wires for a group, each group
and late maintenance of submarine optical fiber cable in system.
interval between 10m), and then, Anti-corrosion treatment will be
performed on the end face of each wire and the transition point will be
Sometimes,there are line connections of different types of submarine fastened by external force. Use wire to wrap polypropylene ropes, and
optical cable in manufacturing length operating range,such as the the number of polypropylene ropes will be gradually reduced to ensure
connections of SA(single armor type) submarine optical fiber cable the its shape. This technology has been successfully applied in the South
and DA(double armor type) submarine optical fiber cable,LEP(steel China Sea observation network project.
belt armor type).Usually,we just take connector box in connection.For
example ,taking online transitory techniques that take different types of Table 6 The on-line transition technology for different cable type
submarine optical fiber cable transition completely is able to decrease
connector box in ine and also short the construction period,enhance the
reliability of line.

2.1. The UJ connector of submarine optical fiber cable
UJ is a technique of using a set of general equipment,instrument and
standardized module to install and maintain all types of submarine optical
fiber cable in submarine communication system.UJ contains different
structural connection in the same manufacturer of submarine optical fiber
cable,such as the connection between SA cable and DA cable in the Nanhai
Sea's observational network of ZTT Group.Also,it can be suit for different
manufacturers in the connection of submarine optical fiber cable.
In LW-LW, for example, a complete UJ, usually consists of three parts, as
shown in Figure 5, which are: ESK (END SPECIFIC KIT) for the cable
end processing, to withhold which is steel wire armored inside, and to
protect the fiber unit. CC (COMMON COMPONENT) is a general
component, including strengthened parts. Tensile and compression of
joints, torsional load and hydrostatic pressure are achieved through the 3. Concluding Remarks
center of a pair of bolts, a set of end caps and a pressure tube.Optical This article analyzed the using performance requirements of
fiber splicing storage, which provides a fiber splicing space, stores optical large length, deep sea submarine optical fiber cable by researching
fiber after welding and allows it to move. Meanwhile, it accomplishes submarine optical fiber cable information transmission system
anti-hydrogen loss capacity by using purpose-made sealed metal ring and submarine observation network system. We researched key
on the interface contacts with metal and welding armored clamps with technologies of insulation performance and matching joint box
an interface. The orange part is an external protective component: in technologies of relay submarine optical fiber cable in the high water,
order to prevent mechanical damage, we use a set of polyurethane shock high voltage and high power conditions. We analyzed changes in the
absorber (unarmored cable) or a set of polyurethane and armored outer performance of insulating materials under different water seepage
tubes (for armored cables) to achieve the goal. Compared with the conditions through experiments, established a simulation design
traditional mechanical joint box, UJ joint has a great technical advantage. model of submarine optical fiber cable with the application of
(1) 25-year storage and service life; finite element analysis software, put forward the reliability scheme
(2) 8000m depth application; of submarine optical fiber cable line with UJ connector and online
(3) 25-year 15kV online operating capacity; transition technology. With the development and implementation
(7) anti-hydrogen loss; of China’s large scientific engineering and national defense
(8) less than 10 hours of joint time (12-core unarmored cable). communication observation project, it is possible to better promote
The electrical performance of submarine cable lines plays a vital role in the development and application of submarine optical fiber cable
relay communication system and ocean observation network system on system engineering in China.
the seafloor. The recovery of insulation using prefabricated polyethylene
in the UJ joint is realized by the CSAMS extruder with micro-program. References Bibliography
After the recovery of Polyethylene, UJ joint will be shooting 360°, [1] CaiBingyu, the application of the deep- sea photoelectric compound cable in the submarine
observation network test system, the third national submarine cable communication technology
Table 5 UJ Joint Schematic Diagram seminar, 2013.
[2] Comprehensive interpretation of the development of the submarine optical fiber cable and the
distribution of submarine cable in China. Optical communication network .2015.
[3] Wang Yadong, the joint measurement of low density polyethylene space charge and conductance
current. Southern power grid technology, volume 9, phase 10.

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