HV and EHV Cable Thermal Ratings

Cable thermal design ensures that high-voltage (HV) and extra-high-voltage (EHV) cables operate safely without overheating under expected load conditions. It involves calculating the maximum current a cable can carry while maintaining temperature limits set by standards.

Our Approach:

• Use IEC 60287 and IEC 60853 calculation methods.

• Model soil thermal resistivity, cable grouping, ducts, and backfill materials.

• Consider transient conditions and emergency ratings.

• Provide detailed reports with thermal curves and compliance checks.

Benefits:

• Rail electrification projects.

• Utility transmission and distribution networks.

• Data centers and renewable energy connections.

Why It Matters:

• Prevents cable insulation damage and premature failure.

• Ensures compliance with IEC standards (IEC 60287 for steady-state, IEC 60853 for cyclic loads).

• Optimizes cable sizing and installation for cost efficiency.

Applications:

• Accurate ampacity ratings for HV/EHV cables.

• Reduced risk of thermal bottlenecks in critical infrastructure.

• Cost-effective design that avoids oversizing