He cable submarino 66kV is an advanced solution for the transmission of electrical energy in aquatic environments. It is used in seas, rivers and lakes, where airlines are not viable. This type of cable is designed to withstand extreme conditions such as high pressure, permanent humidity, corrosion due to salt water and mechanical stress.
The 66kV voltage level is very common in modern projects such as offshore wind farms., interconnection between islands and electricity supply to offshore platforms. Robust design and high-quality insulation ensure safe operation, stable and efficient.
Definition of 66kV submarine cable
A 66kV submarine cable is a medium-high voltage cable designed to transport large amounts of energy underwater.. Installs directly on the seabed or buried for added protection.
It is used when:
- It is not possible to install overhead lines
- High reliability is required
- The environment is complex
- Looking for a solution without visual impact
Submarine cable structure
The submarine cable has multiple layers, each with a key function.
Conductor
The conductor is the core of the cable. Carries electric current.
- Material: copper or aluminum
- Design: compact or segmented
Internal semiconductor screen
Distributes the electric field evenly and avoids internal failures.
Isolation
XLPE is mainly used. EPR is also used in special applications.
Its function is to prevent current leakage and ensure safety.
External semiconductor screen
Controls the electric field outside the insulation.
Metal screen
Usually copper. Allows grounding and protects the system.
Water barrier
Prevents moisture from entering. Can be made of lead or laminated aluminum.
Armor
Made with galvanized steel. Protects against impacts and mechanical stress.
External cover
Protects against corrosion, abrasion and the marine environment.
Types of insulation
XLPE
XLPE is the most used material in 66kV cables.
Advantages:
- High electrical resistance
- Low dielectric loss
- Excellent thermal performance
- Long lifespan
EPR
EPR is more flexible and waterproof.
Advantages:
- High flexibility
- Excellent performance in humidity
- Vibration resistant
Comparison between XLPE and EPR
| Feature | XLPE | EPR |
|---|---|---|
| Rigidity | Alta | Media |
| Flexibility | Baja | Alta |
| Water resistance | Buena | Excellent |
| Temperature | 90°C | 90–105°C |
| Typical use | Fixed installation | dynamic environments |
Driver table (35 mm² a 3000 mm²)
Below is an expanded table of conductor sections for 66kV submarine cable:
| Section (mm²) | Driver type | diameter approx. (mm) | Estimated current (A) |
|---|---|---|---|
| 35 | Copper/Aluminum | 7.0 | 150 – 170 |
| 50 | Copper/Aluminum | 8.5 | 180 – 210 |
| 70 | Copper/Aluminum | 10.0 | 220 – 260 |
| 95 | Copper/Aluminum | 11.5 | 260 – 300 |
| 120 | Copper/Aluminum | 13.0 | 300 – 340 |
| 150 | Copper/Aluminum | 14.5 | 340 – 380 |
| 185 | Copper/Aluminum | 16.0 | 380 – 430 |
| 240 | Copper/Aluminum | 18.0 | 430 – 500 |
| 300 | Copper/Aluminum | 20.0 | 500 – 570 |
| 400 | Copper/Aluminum | 23.0 | 570 – 650 |
| 500 | Copper/Aluminum | 26.0 | 650 – 750 |
| 630 | Copper/Aluminum | 29.0 | 750 – 860 |
| 800 | Copper/Aluminum | 32.0 | 860 – 1000 |
| 1000 | Copper/Aluminum | 36.0 | 1000 – 1150 |
| 1200 | Copper/Aluminum | 40.0 | 1150 – 1300 |
| 1400 | Copper/Aluminum | 43.0 | 1300 – 1450 |
| 1600 | Copper/Aluminum | 46.0 | 1450 – 1600 |
| 2000 | Copper/Aluminum | 50.0 | 1600 – 1800 |
| 2500 | Copper/Aluminum | 55.0 | 1800 – 2100 |
| 3000 | Copper/Aluminum | 60.0 | 2100 – 2400 |
Applications of 66kV submarine cable
This cable is used in many sectors.
offshore wind energy
Transports energy from turbines to ground stations.
Interconnection between islands
Ensures stable and continuous supply.
Plataformas offshore
Supplies electricity to industrial facilities.
Port infrastructure
Powers cranes and electrical equipment.
water crossings
It is used in rivers and lakes without visual impact.
Typical technical parameters
| Parameter | Typical value |
|---|---|
| Rated voltage | 36/66 kV |
| Isolation | XLPE / EPR |
| Conductor | Copper / Aluminum |
| Operating temperature | 90°C |
| Short circuit temperature | 250°C |
| Armor | Galvanized steel |
| Protection against water | Yeah |
Installation methods
Direct installation
The cable is laid on the seabed.
Buried
It is buried for greater protection.
Additional protection
Special pipes or covers are used in critical areas.
Selection factors
To choose the correct cable you must consider:
- Environmental conditions
- Voltage level
- Required power
- Cable length
- Installation type
- Total cost
Advantages of 66kV submarine cable
- High reliability
- Long lifespan
- Low maintenance
- Resistance to extreme conditions
- High energy efficiency
Market trends
The use of 66kV submarine cables continues to grow due to:
- Renewable energy
- Offshore wind farms
- Electrification of isolated areas
- Industrial expansion
Lifespan and maintenance
A well-designed submarine cable can last more than 25 years.
Recommendations:
- Regular inspection
- Load control
- Mechanical protection
- Use of quality materials
Selection between XLPE and EPR
- XLPE is ideal for fixed installations and long distances
- EPR is best for areas with movement
Both materials offer excellent performance.
66kV Submarine Cable Manufacturer
We are professional manufacturer of Cable Submarino 66kV.
We offer:
- Custom design
- Sections from 35 mm² up to 3000 mm²
- High quality materials
- Compliance with international standards
- Full technical support
Our cables are designed to operate in extreme conditions and ensure safe electrical transmission, stable and efficient in underwater projects.