About Submarine Cables

We can all naturally think of overhead cables and underground cables high above the ground When speaking power cables. But there is another kind of cable - submarine cable. Submarine cables lie on the seafloor and convey communication signals from both sides of the ocean. Now, we can live in another country and contact our friends in another country, and submarine cables play an indispensable role in our daily life.

Definition of Submarine Cable

A submarine cable is an electric cable wrapped in insulating material and laid on the ocean floor for telecommunications transmission. Submarine cables have submarine communication cables and submarine power cables.

Uses of Submarine Communication Cables

Submarine communication cables serve mainly for communication services, which are expensive but highly confidential.

Uses of Submarine Cables

Submarine power cables are mainly used for underwater transmission of high-power electricity and are equivalent to underground power cables, except that the applications and laying methods are different.

The History of Submarine Cables

The first submarine cable was laid between England and France in 1850, crossing the English Channel. The first transatlantic submarine cable successfully connected Britain and the United States on August 16, 1858, when Queen Victoria sent her first congratulatory message to American President Buchanan via the submarine cable. Later, American industrialist Cyrus Field invested millions of dollars over several years to build this submarine cable.

The first submarine fiber optic cable was laid in 1988, crossing the Atlantic Ocean to connect Europe and the Americas. Today, the total Length of submarine fiber optic cables exceeds 900,000 kilometers. It is equal to 22.5 times around the equator. These undersea cables are currently responsible for 90% of the world's transnational data transmission.

The submarine cable project is a complex and arduous large-scale project, from environmental exploration, marine physical exploration,   the design, manufacture, and installation of submarine cables, all requiring the application of complex technologies. Therefore, there are few manufacturers of submarine cables in the world, mainly in Norway, Denmark, Japan, Canada, the United States, the United Kingdom, France, Italy, and other countries. These countries also provide laying technology in addition to manufacturing.

Modern submarine cables use fiber optics as the material to transmit telephone and Internet signals. The world's first submarine cable appeared in 1850 and lay between England and France. China completed its first submarine cable in 1998, and now there are two power cables in total. One between Chuan Shi Island in Fuzhou and Huyi (Danshui) in Taiwan, 177 nautical miles long, and the other from Anping in Tainan to Penghu, 53 nautical miles long.

 Advantages of Submarine Cable

1. Laying does not require digging a trench or supporting it with support, thus low investment and fast construction.

2. The cable is under the sea for a long time and will not be damaged by the natural environment such as wind and waves or disturbed by human production activities. Therefore, the cable is safe and stable, with strong anti-interference ability and good secrecy performance.

3. Strong communication ability.

 

ZMS Cable Manufacturing Company specializes in manufacturing all kinds of electric wires, including overhead power cables, submarine cables, control cables, rubber multi-cables, etc. We use the most professional cable laboratory, professional cable technicians to provide customers with the best quality cable products.

Classification of Submarine Cables

The impregnated paper-covered cable can apply for lines below 45 kV AC and below 400 kV DC.  Currently, it can only be installed in water depths not exceeding 500 meters.

Self-capacitating oil-filled cable for DC or AC lines up to 750 kV. Since the power cable is oil-filled, it can easily lay in waters up to 500m deep without difficulty.

Extruded insulation ( Crosslinked polyethylene insulation, ethylene-propylene rubber insulation) cables with voltages up to 200kV AC. Ethylene propylene rubber is more resistant to dendritic phenomena and local leakage than polyethylene, making submarine cables function more effectively.

"Oil-pressure" pipe cables, available only for cable lines several kilometers long, have significant mechanical constraints to pulling extremely long electric cables into the pipe. 

Inflatable (pressure-assisted) cables, when laying long submarine cables, are suitable for use with impregnated paper-wrapped inflatable cables. But the impact of high pressure underwater, design cables and cable accessories you call difficult.

After years of dedicated research, ZMS Cable Manufacturing Company has a variety of high-quality cable products. You can choose our cable products with confidence. The cable products supplied by ZMS Cable are all GB and IEC-certified cable products. Knowing more about ZMS Cable products, you can contact us.