A Best Submarine Cable Manufacturer in China Since 2006
Being a professional submarine cable manufacturer over 20 years, we have developed and innovated to provide you a package supply of the cable, cable shipping & installation and cable accessories, like
- Cable Joint (middle & terminal)
- Submarine Cable Clamp
- Cable Amouring Anchor
- Cable Pulling Head & Cable Protection Tube etc
What is a Submarine Cable
A submarine cable is a power cable, a fiber optic cable or a composite cable laid underwater in rivers, lakes, and seas. It is similar to offshore cables in terms of its main insulation, but differs in the structure of its armor, metal sheath, and length of manufacture. Submarine cables are usually made in a custom long length and shipped by some special trucks or loaded onto a ship directly.
PowerTel & its associated factory can provide you one-stop service for submarine cable design, manufacturing, laying & installation, testing, operation and maintenance, and emergency repair, and sumarine cable accessory; starting from technical consulting for your project and without any end point.
Submarine Power Cable
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AC 12/20 kV Submarine Power Cable -
AC 18/30 kV Submarine Power Cable -
AC 26/35 kV Submarine Power Cable -
AC 48/66 kV Submarine Power Cable -
AC 64/110 kV Submarine Power Cable
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AC 127/220 kV Submarine Power Cable
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DC 200 kV Submarine Power Cable
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DC 250 kV Submarine Power Cable
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DC 320 kV Submarine Power Cable
Main Features of Our Submarine Cable
State-of-the-Art Manufacturing Facilities
We have an annual production capacity of 5000 km for different types of submarine fiber optical cable, thanks to our six armoring lines. Additionally, we are able to provide tailored types of submarine fiber cable based on the specific requirements of any given project.
State-of-the-Art Manufacturing Facilities
Our plant is well equipped with two Voltage Controlled Voltage (VCV) lines, which are capable of handling cables up to 500kV, and two Constant Controlled Voltage (CCV) lines for cables up to 220kV. All the machinery is suitable for triple extrusion of XLPE with a dry cooling system, as well as a degassing system. The materials used are of the highest quality, sourced from reputable international brands, like Borealis, Dow Chemical
Storage Spools for Finished Submarine Cable
Our plant is also equipped with the latest technology allowing us to have the production of submarine cables in a much longer length. It has 10 storage spools for finished cables, as well as two large outdoor spools for the storage of finished submarine fiber optic cable & submarine power cable.
In-house Testing Facilities
Cable testing is an essential part of processing a contract. To ensure submarine cable quality, a complete testing facilities center has been established within the plant , including mechanical tests such as tensile and bending tests, coiling, impact, crush, and environmental tests, like aging tests, water penetration tests etc.
One-stop Service Provider for Submarine Cable
Our international–level professionals in ship–laying and installation, combined with our experienced construction personnel, allow us to offer a range of construction services for submarine cable, including cable laying, installation, and transportation from the factory.
Complete Product Chain for Submarine Cable Project
Except Submarine fiber optic cable and submarine power cable, we are still available of cable accessory and its installation, like straight cable joint, cable terminal kit, cable link box, cable clamp, cable armoring anchor and cable pulling head etc.
Related Product
What types of submarine cables are there
Submarine cables can be divided into three main types, Submarine Fiber Optic Cable, Submarine Power Cable and Composite Submarine cable;
For Submarine fiber optic cable, it has two main categories with or without a repeater system in a cable structure with no-armore, single armore and double armores.
For Submarine power cable, it has two main categories as well, AC & DC submarine power cable, in three–core , single–core and two–in–one submarine power cable.DC submarine cables have low loss and are suitable for long–distance transmission, but their applications are limited and expensive. AC submarine cables have higher loss, but offer more mature operation and maintenance capabilities and cheaper for the costs.
Composite Submarine cable, it consits of some optical fiber for telecommunication and copper conductor for power transmission.
What steps for laying & installing a submarine cable
1.Route investigation of submarine cables
The cable route investigation before the submarine cable laying includes: clearing the water depth, topography, and shallow strata profile measurement of the offshore routing area; sediment surface sampling, columnar sampling and static penetrating survey; also includes traffic and construction conditions reflecting the status of marine development activities and obstacles. Recently, the use of advanced GPS post-processing positioning and (CPT) static penetrating sounding technology has greatly improved the survey speed and effect.
2. Laying of submarine cables
The submarine cable laying project is recognized as a complex and difficult large-scale project by countries all over the world. When laying the cable, control the sailing speed of the laying ship and the release speed of the cable to control the angle of the cable entering the water and the laying tension, so as to avoid damage to the cable due to too small bending radius or too large tension. In shallow seas, if the water depth is less than 200 meters, the cables are buried, while in deep seas, they are laid. The cables are released by the cable laying ship, and the underwater monitor and underwater remote control vehicle are used to continuously monitor and adjust, and control the laying ship. The forward speed, direction and speed of laying the cable can avoid uneven places and rocks to avoid damage to the cable.
3. Burying protection for submarine cables
In the final stage of construction, the main purpose is to deeply bury the submarine cables to reduce the impact of the complex marine environment on the submarine cables and ensure safe operation. In the sandy land and silt area, use high-pressure flushing to create a trench about 2 meters deep, bury the cable in it, and cover it with the sand next to it; in the coral reef and clay area, use a cutting machine to cut a 0.6-1.2-meter trench For deep trenches, bury the cables in the trenches and backfill them naturally to form protection; in hard rock areas, hard objects such as cement cover plates need to be covered on the cables for protection.
4.Testing and acceptance of submarine cables
After the submarine cable is laid and buried, the testing and acceptance work should be carried out in strict accordance with the requirements of the construction quality control plan. The inspection items include cable resistance, insulation resistance, sheath continuity, and grounding resistance. If the test results are qualified, the cable is accepted and put into normal operation.