Medium Voltage Submarine Cable

The XLPE Insulated & Sheathed 3 core submersible cables that we deal in are ideal for usage in submersible pumps in deep wells for irrigation (Direct Burial), drinking water supply, industries, mines, fountains.

Submarine fiber optic cable is also known as submarine communication cable. It is a wire wrapped in insulating material and laid on the ocean floor.

Submarine fiber optic cables are the arteries that ensure that major regional networks around the world can operate with each other.

Currently, more than 90% of the world's transnational data transmission is carried by submarine fiber optic cables.

Subsea Cables are generally available in two voltage classes, high voltage, and medium voltage. Since higher voltages require thicker conductors, the cross-section of undersea cable is larger.

All products in the ZMS series of submarine fiber optic cables have the essential features of the products themselves, such as superior mechanical reliability and industry-leading optical performance, and some cable materials are selected from premium materials and production processes.

Our submarine fiber optic insulation offers you a range of installation solutions and finishing steps, with coloring and splicing options, as well as development lengths, all considered for your needs.

It also helps submarine fiber optic cable manufacturers reduce costs and minimize footprint.

Our finishing steps provide the reliability and performance required for harsh subsea environments.

ZMS Submarine medium voltage cables are similar to submarine high voltage cables and generally have the following product categories.

  • XLPE insulated AC medium voltage submarine cables with fiber optic cables 

  • XLPE insulated Submarine MV AC cables

  • EPR insulated AC MV Medium Voltage subsea power cable

  • High voltage HVAC submarine cable

The basic structure of general subsea fiber optic cable is a polyethylene layer, polyester resin or asphalt layer, steel strand layer, aluminum waterproof layer, polycarbonate layer, copper or aluminum tube, paraffin, alkane layer, fiber bundle, etc.

Offshore Cable Specifications

Product Scope: Subsea, shallow sea

Fiber Count: 12 24 36 48 72 core

. Precise control of the fiber length to ensure good tensile properties and temperature characteristics of the cable.

. Cross-linked polyethylene (XLPE) or polyethylene (PE) sheath with good resistance to UV radiation.

. Good compression resistance and flexibility.

. Loose sleeves filled with special waterproof compounds.

. Double-sided chrome-plated plastic coated steel strip (PSP) to improve the moisture permeability of the fiber optic cable.

. Good water barrier material to prevent longitudinal water penetration of the cable.

The medium voltage submarine cable systems are mainly used to connect fiber optic cables to the Internet and it consists of two main parts: land-based equipment and underwater equipment.

Among the underwater equipment, the submarine fiber optic cable is the most important and vulnerable part.

The general process is that the onshore equipment packages and transmits communication services such as voice, image, and data underwater, and the underwater equipment is responsible for processing, sending, and receiving the

communication signals.

Underwater equipment is divided into three parts: submarine fiber optic cable, repeaters, and "branch units": of which submarine fiber optic cable is the most important and vulnerable part.

Advantages of medium voltage submarine fiber optic cable

  1. Submarine fiber optic cable is wrapped in an insulated sheath bundle laid on the sea floor, seawater can prevent interference from external light and magnetic waves, so the signal-to-noise ratio of submarine fiber optic cable is very high.

  2. The communication process of submarine fiber optic cable is not felt in the time delay, and the real-time is particularly high and accurate.

  3. Submarine fiber optic cables are designed to operate continuously for 25 years, while artificial satellites generally run out of fuel in 10 to 15 years.


Medium Voltage 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. Screen: Copper wires and copper helix, swelling powder.

7. Laminated Core Sheath: Al. laminated tape bonded to overlaying 

8. Sheath: PE 

9. Fillers: Polypropylene filler.

10. Fibre-Optic Element: Fibre optic cable.

11. Separator: Binder tapes.

12. Bedding Layer: Polypropylene strings.

13. Armour: Galvanized steel wires.

14. Serving: Hessian Tapes, bituminous compound, polypropylene strings.

Prospects Of ZMS Submarine Cables

Due to the complexity of the marine environment puts high demands on submarine cable engineering, underwater cable engineering is a recognized problem in many countries around the world.

Because submarine cable engineering is not only difficult to construct but also costly to maintain.

Only a few cable companies in the world today are also capable of laying and commissioning submarine high voltage medium voltage cables. So the development of the submarine cable market is greatly restricted.

There are more problems, but there are also more solutions to the problem.

In the future, the application space of medium-voltage submarine cable will be more extensive, it is important infrastructure equipment, is an important technical support for human beings to achieve effective expansion of their own field of activity.

It transports clean ocean energy to the mainland, relieving the tension of mainland resources, and also transports 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 the production with high-quality products and professional after-sales service.

ZMS Cable Company has a strong technical force, exquisite craftsmanship, advanced production equipment, complete cable 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.

It has also studied and independently judged various new products, taking into account comprehensive factors such as equipment, materials, output, conversion efficiency, quality, and cost, and has mastered the right timing for production.

For the mainstream technology direction of cables, the company has set aside for 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 power 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.

With the above introduction, you can also be assured that precisely because ZMS has professional experience in the production of submarine cables, we can customize the submarine cable products you want according to the requirements and

needs of any customer.

You can provide us with the following information: cable voltage, conductor material, insulation and sheath material, shield type, armor type, etc. or you can provide us with cable installation environment, application requirements, etc.

We will serve you wholeheartedly. ZMS Cable Supplier has a number of quality certifications: ISO 9000, ISO 9001, ISO14000, ISO14001, ISO18000, CE, IEC, BS, NFC, ASTM, DIN, etc.

Offshore Cable Specifications:


Nominal Cross Section AreaCapacitanceInductanceCurrent Rating


Nominal Cross Section AreaCapacitanceInductanceCurrent Rating

18/30(36) KV

Nominal Cross Section AreaCapacitanceInductanceCurrent Rating

Dimension and Weight

6/10(12) 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

12/20(24) 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

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

Special 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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