CIGRE TB 880 Validation: IEC 60287 Cable Rating Accuracy
We ran every CIGRE TB 880 case study through EasyCableSizing, 23 benchmark calculations from underground ducts and pipe-type cables to free air, troughs and HVDC submarine links. See how closely the IEC 60287 current ratings match the published brochure values, case by case.
Experience professional cable current rating calculations with EasyCableSizing's CIGRE TB880 validation suite. No registration required - test industry-standard cable sizing software used by electrical engineers worldwide.
Why Cable Sizing Software Validation Matters for Electrical Engineers
Cable current rating calculations aren't just about applying IEC 60287 formulas—it's about ensuring those formulas are implemented correctly and consistently across different cable sizing tools. When CIGRE Working Group B1.56 developed the TB880 cable rating verification standard, they discovered that even industry experts were getting different current ratings for identical high voltage cable installations. The problem wasn't the electrical engineering calculations themselves, but the interpretation and implementation of the IEC 60287 cable current rating standards.
This is precisely why we've built EasyCableSizing cable sizing software from the ground up using the CIGRE TB880 methodology for power cable current rating calculations. Every ampacity calculation, every thermal resistance iteration, every intermediate result has been validated against these electrical engineering industry benchmarks, most of them to 10 decimal places.
Free Cable Sizing Software Demo - No Registration Required
Access to All Implemented CIGRE TB880 Cable Rating Case Studies: No registration barriers, no trial limitations for this cable sizing software demo. You can now run the exact same cable current rating validation cases that we use to verify our electrical engineering software—the same high voltage cable case studies that cable sizing tools worldwide are measured against.
Professional Cable Current Rating Precision: Experience cable ampacity calculations to 10 significant figures, the same precision used by CIGRE experts for detecting discrepancies between cable sizing tools. This isn't about claiming unrealistic accuracy—it's about providing the granular detail needed for proper cable rating software validation. Note: Standard EasyCableSizing interface displays results to 2 decimal places for practical use, with 10-decimal precision available in demo mode for validation purposes.
Complete Cable Sizing PDF Reports: Generate professional cable current rating reports including all input parameters, intermediate thermal resistance calculations, and final ampacity ratings. These cable sizing reports are identical to what our electrical engineering subscribers receive for their custom power cable projects.
Cable Current Rating Validation Results - EasyCableSizing vs CIGRE TB880
| Cable Sizing Case Study | Cable Current Rating Description | CIGRE Reference [A] | EasyCableSizing [A] | Difference & Accuracy |
|---|---|---|---|---|
| 0-1 Base | 132kV XLPE cable direct burial, trefoil using Cable TB880-0 | 821.7763334392 | 821.7763334392 | 0 A 100% |
| 0-1 Var1 | Cable current rating with depth approximation for T4 using Cable TB880-0 | 821.8113708239 | 821.8113708239 | 0 A 100% |
| 0-1 Var2 | Single point bonding cable ampacity using Cable TB880-0 | 886.175285472 | 886.175285472 | 0 A 100% |
| 0-1 Var3 | Cable rating with eddy-current losses using Cable TB880-0 | 803.1595966445 | 803.1595966445 | 0 A 100% |
| 0-2 Base | HDPE duct cable installation current rating using Cable TB880-0 | 682.81446487 | 682.81446487 | 0 A 100% |
| 0-2 Var1 | Duct installation with eddy-current losses using Cable TB880-0 | 679.8409804502 | 679.8409804502 | 0 A 100% |
| 0-3 Base | PVC duct bank cable current rating using Cable TB880-0 | 634.073418992 | 634.073418992 | 0 A 100% |
| 0-3 Var1 | Concrete ductbank single point bonding using Cable TB880-0 | 904.5519955345 | 904.5519955345 | 0 A 100% |
| 0-3 Var2 | Ductbank with eddy-current losses using Cable TB880-0 | 633.0356512622 | 633.0356512622 | 0 A 100% |
| 0-4 | 132kV cable in free air with solar radiation using Cable TB880-0 | 974.2802128208 | 974.2802128208 | 0 A 100% |
| 0-5 | 132kV cable in an unfilled trough using Cable TB880-0 | 754.8606238737 | 754.9396150995 | +0.0789912258 A 99.989536% |
| 1-1 | Multi-circuit trefoil cable current rating using Cable TB880-1 | 990.5401450554 | 990.5401450554 | 0 A 100% |
| 1-2 | Multi-circuit flat formation ampacity using Cable TB880-1 | 1460.4545417538 | 1460.4545417538 | 0 A 100% |
| 2 | 30kV submarine cable current rating using Cable TB880-2 | 838.3399739337 | 838.3399739336 | 0.0000000001 A 100% |
| 3 | 230kV HPFF pipe-type cable using Cable TB880-3 | 1187.3557487 | 1187.7467339817 | +0.3909852817 A 99.967071% |
| 4 | 33kV land cable ampacity calculation using Cable TB880-4 | 537.4631099368 | 537.4631099368 | 0 A 100% |
| 5-1 | 400kV LPOF trefoil cable current rating using Cable TB880-5 | 903.6213914485 | 903.6213914485 | 0 A 100% |
| 5-2 | 400kV LPOF flat cable ampacity using Cable TB880-5 | 1590.225147906 | 1590.225147906 | 0 A 100% |
| 6 | 400kV submarine cable wide spacing using Cable TB880-6 | 1039.4347828913 | 1039.4354332932 | -0.0006504019 A 99.999937% |
| 7 | 320kV HVDC submarine bipole, field-limited, using Cable TB880-7 | 2046.4286136895 | 2046.3401749880 | -0.0884387015 A 99.995678% |
| 8 | 220kV submarine export cable current rating using Cable TB880-8 | 1134.8196615454 | 1134.8196615454 | 0 A 100% |
| 9 | 110kV XLPE triplex cable in a steel pipe using Cable TB880-9 | 572.4336357055 | 572.6032616316 | +0.1696259261 A 99.970368% |
| 10 | 10kV PILC sector-conductor cable using Cable TB880-10 | 165.7415608133 | 165.7394225180 | -0.0021382953 A 99.998710% |
Every CIGRE TB 880 case study now runs in EasyCableSizing. Seventeen match the published ten-digit value exactly, including the free-air case 0-4 added since this article was first published, and Case Study 6 matches to 99.999937%. The other five added since then (0-5, 3, 7, 9 and 10) all land within 0.035% of the brochure.
Implementation Scope
Every case study in CIGRE TB 880 now runs in EasyCableSizing. When this article was first published, six were still to come. They are now all live, and all in the table above:
Pipe-Type Cables (Case Studies 3 and 9): Case Study 3 is a 230kV HPFF pipe-type cable. Case Study 9 is a 110kV XLPE triplex cable retrofitted into a PE-covered steel pipe, where the air in the pipe is iterated to the same converged temperature the brochure reports.
Air Installations (Case Study 0-4): Cables in free air with solar radiation.
Unfilled Trough Installations (Case Study 0-5): Cables laid in an unfilled trough flush with the ground surface.
HVDC Submarine Cables (Case Study 7): A 320kV bipole, where the rating is limited by the electric field in the insulation rather than by conductor temperature.
Paper-Insulated Cables (Case Study 10): A 10kV PILC cable with sector-shaped conductors, a lead sheath and steel tape armour.
The CIGRE TB880 Validation Suite
The demo area provides access to all implemented case studies from CIGRE TB880, representing the core calculation methodologies used across the global power industry:
Case Study 0-1 using Cable TB880-0
132kV XLPE cable with multiple installation and operational variations:
- Base case: Direct burial in trefoil formation at 1.0m depth
- Variation 1: Alternative depth calculation methodology
- Variation 2: Single-point bonding configuration
- Variation 3: Including eddy-current losses in metallic sheaths
Case Study 0-2 using Cable TB880-0
Cables in touching HDPE ducts, with variation including eddy-current losses.
Case Study 0-3 using Cable TB880-0
PVC ducts in flat formation embedded in concrete with single point bonding and eddy-current loss variations.
Case Study 0-3: PVC ducts in concrete ductbank configuration
Case Study 0-4 using Cable TB880-0
Touching cables in trefoil in free air, exposed to solar radiation.
Case Study 0-5 using Cable TB880-0
Touching cables in flat formation in an unfilled trough, with the top flush with the ground surface.
Case Study 1 using Cable TB880-1
Multi-circuit installations in trefoil and flat formations demonstrating thermal interaction effects between parallel circuits.
Case Study 2 using Cable TB880-2
30kV submarine three-core cable with steel wire armour.
Case Study 3 using Cable TB880-3
230kV high-pressure fluid-filled (HPFF) pipe-type cable.
Case Study 4 using Cable TB880-4
33kV land cable in trefoil formation with solid bonding.
Case Study 5 using Cable TB880-5
400kV LPOF submarine cables in both trefoil and flat formations.
Case Study 6 using Cable TB880-6
The notorious validation challenge: 400kV single-core submarine cables with 10m spacing - a case that challenges even commercial software.
Case Study 7 using Cable TB880-7
320kV HVDC submarine bipole, rated to the insulation field limit rather than the conductor temperature.
Case Study 8 using Cable TB880-8
220kV three-core submarine export cable with stainless steel armour.
Case Study 8: 220kV three-core submarine cable designer interface
Case Study 9 using Cable TB880-9
110kV XLPE triplex cable retrofitted into a PE-covered steel pipe.
Case Study 10 using Cable TB880-10
10kV paper-insulated lead-covered (PILC) cable with sector-shaped conductors and steel tape armour.
Beyond the Demo Cases
While the CIGRE TB880 cases provide comprehensive validation, real-world cable sizing often involves scenarios not covered in the standard validation suite. Our subscribers gain access to:
- Custom cable definitions with any conductor size, insulation type, or construction
- Project-specific environmental conditions including varying soil thermal resistivities and ambient temperatures
- Multi-voltage installations from LV distribution to EHV transmission applications
- Historical project archiving for reference and repeat calculations
- Complete PDF reporting with all calculation parameters and results
The demo cases show you exactly what you're getting—professional-grade calculations with full transparency into every step of the process.
Getting Started
Ready to experience professional cable sizing calculations? No registration required—simply visit any of the case study links above and start exploring. Run the calculations, examine the detailed results, export the PDF reports, and see for yourself the level of detail and accuracy that EasyCableSizing provides.
Whether you're evaluating software options, learning cable sizing principles, or verifying your current tools against industry standards, these validation cases provide the perfect starting point.
If you would rather have the study done than run it, Star Delta Power carries out cable rating studies on the same IEC 60287 and CIGRE TB 880 basis, from a single calculation to a full cable system design.
For further reading on cable sizing fundamentals, explore our articles on Tackling Voltage Drop in Electrical Cables and Understanding the IEC 60502 Sizing System.
Available Now - No Registration Required:
- ✅ Access to all implemented CIGRE TB880 validation cases
- ✅ 10-decimal place calculation precision for validation
- ✅ Professional PDF report generation
- ✅ Every TB 880 case study, seventeen matching the brochure exactly and all within 0.035%
- ✅ Direct access to all case studies and cables
- ✅ Zero barriers to professional cable sizing experience