XLPE Insulated AC Medium-voltage Submarine Cable

The cable core is covered with a PE outer sheath.After the single steel armored,the cable is finally completed with an outer sheath.


XLPE Insulated AC submarine cables are used for power transmission to offshore islands, oil platforms, or to cross rivers and lakes. 

Cable design is based on the major national or international standards e.g. VDE, IEC, and ICEA, or according to customers' design and standards.

Offshore Cable Standards

IEC 60228; IEC 60502;IEC 60840; IEC 62067


1. Conductor: Copper conductor, circular stranded compacted, water blocked.

2. Conductor Screening: Extruded semi-conductive compound.

3. Insulation: XLPE.

4. Insulation Screening: Extruded semi-conductive compound.

5. Waterproof Layer: semi-conductive waterproof tape

6. Conductor Screen: Copper tapes.

7. Separator: Plastic foil.

8. Core Sheath: PE.

9. Fillers: Polypropylene filler.

10. Separator: Binder tapes

11. XLPE cable layers: Polypropylene strings.

12. Armour: Galvanized steel wires.

13. Serving: Hessian tapes, bituminous compound, polypropylene strings.

Zmscable has a wide variety of submarine cables, and there are four major categories depending on voltage level, transmission type, transmission role, and insulation material.

Voltage Classification

According to the voltage level, it can be divided into five categories: low-voltage cable, medium-voltage cable, high-voltage cable, ultra-high-voltage cable, and extra-high-voltage cable.
Low-voltage cables are commonly used in residential or small commercial customers to utility distribution lines, medium-voltage cables are commonly used in urban and suburban power distribution, and high-voltage and above cables are usually used for long-distance or high-efficiency power transmission.

Different Transmission Roles
Can be divided into power collection submarine cable and transmission submarine cable.
The collector cable is generally used for the connection of offshore wind turbines, and the feeder cable is used for the grid connection of wind turbines.
In the offshore wind power transmission process, the wind turbine power generation is sent to the offshore booster station through the collector cable, and then the voltage is raised and then transmitted to the grid onshore by the outlet cable.
The common collector cable is usually 35 kV AC and the output cable is 220 kV AC, but higher voltage levels may be adopted depending on the demand.

Different Forms Of Circuit Transmission
Can be divided into AC submarine cable transmission and DC submarine cable transmission.
AC submarine cable transmission is developed earlier, the technology is relatively mature, the production cost is lower, and early offshore wind power mostly uses the high-voltage AC transmission method.
The high-voltage DC transmission system is at the beginning of the transmission line, the wind turbine output of AC medium power through the step-up transformer, and then through the collection of marine cable to the offshore converter station converted to DC, and finally through the DC line transmission to the onshore converter station converted to meet the requirements of the AC power and grid-connected.
A flexible DC transmission system is a new type of convertible DC transmission technology based on the traditional DC transmission system with the introduction of switchable electronics, which can provide stable support for voltage and also has the advantage of strong controllability.

Different Insulation Materials
Our company divides the submarine cable into oil paper insulated submarine cable, rubber XLPE insulated submarine cable, and plastic insulated submarine cable.
Cross-linked polyethylene (XLPE) insulated cable is a kind of cable that is suitable for distribution networks and other fields.
It its simple structure, lightweight, good heat resistance, strong load capacity, not ease to melt, chemical corrosion resistance, and high mechanical strength, has been the most widely used submarine cable products.
But from the market of high-voltage DC transmission submarine cable, the traditional oil-paper insulated transmission submarine cable is still the mainstream product.

Compared With Underground Cables, Submarine Cables Have Many Advantages

First, laying does not require digging trenches or support with brackets, thus less investment and faster construction.
Secondly, in addition to the landing lot, the deepest submarine wire and cable are mostly tested in the seabed for a certain period of time and will not be damaged by the natural environment such as wind and waves, and the interference of human production activities.
Therefore, the submarine line is safe and stable, with strong anti-interference ability and good confidentiality performance.

ZMS Submarine Cable Development Prospects

The complexity of the marine environment places high demands on submarine cable engineering, and underwater cable engineering is a recognized problem worldwide.
Because of the difficulty of construction and high maintenance costs.
So at that time, only a few companies or countries in the world have the ability to lay and commission, and maintain submarine high-voltage cables.
The development of the submarine cable market was greatly restricted as a result.
There are more problems, but there are also more solutions to the problem.
In the future, the application space of submarine cable will be more extensive, because it is an important transmission infrastructure equipment and important technical support for human beings to achieve effective expansion of their own field of activity.
It transmits abundant ocean energy to the mainland, relieving the tension of mainland resources, and also transmits energy from the mainland to the ocean, contributing to the development of the ocean economy.

ZMS Submarine Cable is convinced of this.
Therefore, we strictly require ourselves to manage with high-quality products and attentive after-sales service. 

ZMS Cable Company has a strong technical force, exquisite craftsmanship, advanced production equipment, complete testing means, and advanced enterprise management.
The submarine cable products produced by ZMS Cable Factory include submarine power cables, submarine communication cables, submarine optical cables, underwater cables, Internet cables in the ocean, and other products.
Studies and independent judgments have also been made on various new products, taking into account comprehensive factors such as equipment, materials, output, conversion efficiency, quality and cost, and the right timing for production.
For the mainstream technology direction, the company has set aside mass production and will launch differentiated products according to the characteristics of different markets.

In recent years, through independent research and development, the company has been breaking through the length and voltage level of underwater cable production and has taken the lead in developing special submarine cables such as dynamic submarine cables and towing cables.
The submarine cable-related products produced are widely used in marine scientific research and resource development and other fields, providing a boost to the construction of China's "Ocean Power" strategy.

To sum up, if you have any questions or needs about the cable, welcome email inquiries, we also provide professional cable customization services to meet your product needs.

Electrical Data


Nominal Cross Section AreaCapacitanceInductanceCurrent Rating


Nominal Cross Section AreaCapacitanceInductanceCurrent Rating


Nominal Cross Section AreaCapacitanceInductanceCurrent Rating

Dimension And Weight


Nominal Cross Section AreaNominal Conductor DiameterNominal Insulation ThicknessNominal Screen Cross Section AreaNominal Core Sheath ThicknessNominal Core DiameterNominal Bedding ThicknessNominal Steel Wire DiameterServing ThicknessOverall DiameterWeight


Nominal Cross Section AreaNominal Conductor DiameterNominal Insulation ThicknessNominal Screen Cross Section AreaNominal Core Sheath ThicknessNominal Core DiameterNominal Bedding ThicknessNominal Steel Wire DiameterServing ThicknessOverall DiameterWeight

18/30(36) kV

Nominal Cross Section AreaNominal Conductor DiameterNominal Insulation ThicknessNominal Screen Cross Section AreaNominal Core Sheath ThicknessNominal Core DiameterNominal Bedding ThicknessNominal Steel Wire DiameterServing ThicknessOverall DiameterWeight

Submarine Cable

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ZMS Cable have a wide product scope, includes: Power cables up to 500kV, AAC, AAAC, ACSR conductors, ABC Cable,electric wires, instrument cable, telecommunications cable, Stay wires. With advanced manufacture technology, rich human resource and effective management system, we guarantee all products are manufactured strictly in accordance with GB, IEC, BS, NFC, ASTM, DIN standards,etc. Beyond quality control, ZMS have been trying its best to offer much higher standard of services rather than expected.

The Adjuster
All customised cables designed by our cable engineer will be subject to testing to relevant standards and appropriate performance criteria. Bespoke cable testing will be conducted under our CNAS accreditation where appropriate. Where required by industry or application, we can submit for relevant cable certification and cable approval processes. For more information or to discuss possible custom designed cable solutions, please complete an enquiry form, contact our technical experts on the Technical Hotline +86 (0)371 6782 9333, or

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