The submarine cables 5 kV They are essential for the transmission of electrical energy in marine and coastal environments. And 5kV submarine cable must guarantee durability, safety and compliance with international standards, offering reliable solutions for offshore wind farms, islands and marine platforms.
What is a 5kV submarine cable?
Medium voltage submarine cables 5kV They are used to transmit electrical energy from generators to substations or to interconnect platforms and coastal networks.. Besides, must withstand extreme marine conditions, like water pressure, sea currents, corrosion and mechanical loads during installation.
In addition, submarine cables 5 kV meet international standards such as IEC 60228, IEC 60502, IEC 60840 y ASTM, guaranteeing global compatibility and security in transmission projects.
Structure of a 5kV submarine cable
And 5kV submarine cable Typical includes the following layers:
Conductor
The driver can be copper or aluminum, with sections selected according to rated current and IEC or ASTM standards. The same way, Conductor material affects electrical resistance and energy efficiency.
Isolation
insulation is used XLPE o EPR, that provide high electrical resistance, thermal and chemical. Besides, Protect against partial discharge and short circuit faults.
Screen and metal cover
The semiconductor screen and the lead cover (Lead Sheath) protect the cable from water ingress and ensure electrical integrity throughout its useful life.
Armor
The armor can be galvanized steel or aluminum wire, providing mechanical resistance against impacts and traction during installation in marine environments.
External cover
The outer cover of PE a PVC protects the cable against abrasion, corrosion and environmental exposure, ensuring durability and reliability.
IEC conductor sizes (10 mm² – 1000 mm²)
According to the standard IEC 60228, 5kV submarine cables are produced with the following conductor sections:
| IEC Section (mm²) | Conductor | Isolation | lead cover | Armor | External cover |
|---|---|---|---|---|---|
| 10 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 16 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 25 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 35 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 50 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 70 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 95 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 120 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 150 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 185 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 240 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 300 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 400 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 500 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 630 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 800 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 1000 | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
ASTM Conductor Sizes / AWG (20 AWG – 1000 MCM)
For international projects, The cables 5 kV are also manufactured following ASTM / AWG:
| Driver size | Conductor | Isolation | lead cover | Armor | External cover |
|---|---|---|---|---|---|
| 20 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 18 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 16 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 14 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 12 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 10 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 8 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 6 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 4 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 3 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 2 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 1 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 1/0 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 2/0 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 3/0 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 4/0 AWG | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 250 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 300 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 350 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 400 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 500 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 600 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 750 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
| 1000 MCM | Cu / Al | XLPE / EPR | Yeah | Steel / Al | PE / PVC |
Complete technical table of 5kV submarine cables
| Section (mm² / AWG) | Conductor | Conductor diameter (mm) | Insulation thickness (mm) | Armor thickness (mm) | External diameter (mm) | Weight (kg/m) | DC resistance (Oh/km) | Rated current (A) |
|---|---|---|---|---|---|---|---|---|
| 10 | Cu | 3,57 | 2,5 | 3,5 | 12,5 | 1,2 | 1,83 | 60 |
| 16 | Cu | 4,51 | 2,8 | 3,5 | 14,8 | 1,8 | 1,15 | 85 |
| 25 | Cu | 5,64 | 3,0 | 4,0 | 16,8 | 2,6 | 0,727 | 125 |
| 35 | Cu | 6,69 | 3,3 | 4,0 | 18,9 | 3,3 | 0,524 | 155 |
| 50 | Cu | 7,98 | 3,6 | 4,0 | 21,5 | 4,5 | 0,386 | 185 |
| 70 | Cu | 9,44 | 3,8 | 4,0 | 24,3 | 6,0 | 0,268 | 230 |
| 95 | Cu | 11,0 | 4,0 | 4,5 | 27,6 | 7,8 | 0,206 | 265 |
| 120 | Cu | 12,2 | 4,2 | 4,5 | 30,5 | 9,3 | 0,153 | 310 |
| 185 | Cu | 15,3 | 4,5 | 5,0 | 36,0 | 13,8 | 0,099 | 390 |
| 240 | Cu | 17,5 | 5,0 | 5,0 | 40,8 | 17,5 | 0,076 | 450 |
| 300 | Cu | 19,6 | 5,0 | 5,0 | 44,9 | 21,8 | 0,064 | 520 |
| 400 | Cu | 22,5 | 5,5 | 5,5 | 52,5 | 30,0 | 0,048 | 600 |
| 500 | Cu | 25,2 | 6,0 | 5,5 | 58,0 | 36,5 | 0,038 | 710 |
| 630 | Cu | 28,3 | 6,0 | 6,0 | 63,5 | 42,0 | 0,030 | 780 |
| 800 | Cu | 31,9 | 6,5 | 6,0 | 70,5 | 52,0 | 0,024 | 870 |
| 1000 | Cu | 35,7 | 6,5 | 6,0 | 78,2 | 62,0 | 0,019 | 980 |
5kV submarine cable applications
The cables 5 kV are widely used in:
- Offshore wind and solar farms: efficient and stable transmission.
- Connecting Islands and Coastal Communities: reliable and secure power supply.
- Oil and gas platforms: power for critical equipment.
- Port infrastructure and substations: interconnection and power distribution.
Therefore, and 5kV submarine cable well designed guarantees safety, long-term efficiency and durability.
Tests and standards
To ensure quality, The cables 5 kV pass tests:
- Electrical: strain, partial downloads, DC resistance.
- Mechanical: traction, flexion, impact.
- Environmental: water resistance, corrosion, thermal aging.
Besides, meet standards IEC 60228, IEC 60502, ASTM B3, ASTM B8 y IEEE, ensuring security and international compatibility.
How to choose a 5kV submarine cable
When selecting a 5kV submarine cable, consider:
- Manufacturer experience in marine environments.
- Compliance with IEC and ASTM standards.
- Driver quality, isolation, armor and cover.
- Electrical Testing Certifications, mechanical and environmental.
- Technical support and references for offshore projects.
This way, the efficiency and safety of the underwater electrical system is guaranteed.
This way, the efficiency and safety of the underwater electrical system is guaranteed.
Regarding 15kV submarine cables, please consult…