Understanding the (N)TSCGEWÖU Mining Reeling Cable MT MIN F PLUS: A Comprehensive Technical Guide
Anhui Feichun Special Cable Co., Ltd.
安徽飞纯特种电缆有限公司
Understanding the (N)TSCGEWÖU Mining Reeling Cable MT MIN F PLUS: A Comprehensive Technical Guide
Introduction
The (N)TSCGEWÖU Mining Reeling Cable MT MIN F PLUS represents a pinnacle of engineering excellence in medium voltage power transmission for the most demanding industrial applications. Engineered specifically for mining operations and material handling equipment, this cable type is designed to withstand extreme mechanical stresses while maintaining reliable electrical performance in harsh environmental conditions.
What sets this cable apart? The TSCGEWÖU designation indicates a sophisticated cable construction featuring tinned copper conductors (T), semiconductive layers (SC), rubber insulation with electrical field control (GE), split earth conductors (W), and specialized outer sheaths (ÖU) designed for optimal performance in reeling applications.
Based on the stringent DIN VDE 0250 Part 813 standard, this cable is specifically designed for trailing and reeling applications in mines, quarries, and open-pit operations. The VDE 0250 Part 813 standard has gained global recognition as the ultimate benchmark for tough rubber sheathed flexible reeling cables, particularly for crane and material handling equipment applications.[1]
Purpose and Applications
Primary Applications
The (N)TSCGEWÖU cable is engineered for demanding applications including:
🏗️ Mining Operations
Fixed energy distribution lines in underground and surface mines
Connection of large mobile mining equipment
Excavators, draglines, and shovels
⚙️ Material Handling
Port machinery and container cranes
Gantry cranes and spreaders
Mobile crushers and dumpers
🔄 Reeling Systems
Motorized reeling on mono-spiral reelers
Level-wind reeling systems
Cylindrical cable drums
🏭 Heavy Industry
Open-cast mining facilities
Quarry operations
Industrial material transport systems
Application Expertise: This cable excels in environments requiring high mechanical stress resistance, including high travel speeds, dynamic tensile loads, multiple directional changes, and torsional stresses. The cable is specifically designed for operation under extreme mechanical stresses such as churning on running over rollers and simultaneous tensile and torsion stress.[2]
Key Technical Characteristics
Outstanding Performance Features
- Extreme Flexibility: Class 5 conductor construction (VDE 0295/IEC 60228) ensures maximum flexibility for continuous reeling operations
- Superior Mechanical Strength: Maximum tensile loads up to 20 N/mm² during normal operation, with acceleration loads up to 30 N/mm²
- Advanced Electrical Field Control: Inner and outer semiconductive layers extruded in a single pass with the insulation provide superior electrical field management[3]
- Enhanced Durability: Tinned copper conductors resist corrosion in harsh mining environments
- Temperature Resilience: Operational range from -40°C to +80°C for static installations, -25°C to +90°C on conductor during operation
- Fire Safety: Flame retardant according to IEC 60332-1-2 standard
- Chemical Resistance: Resistant to oils, ozone, and weather conditions (suitable for indoor and outdoor use)
- Water Performance: Designed for wet and damp environments according to HD22.16
Semiconductive Layer Technology
The cable features advanced semiconductive rubber layers that provide critical electrical field control. These layers have a maximum resistivity of 200 Ω·m and are capable of being stripped when cold, making cable preparation extremely easy.[4] This “Easy Strip” design significantly reduces installation time and improves termination reliability.
Material Structure and Construction
Phase Conductors
| Component | Specification | Standard Reference |
|---|---|---|
| Conductor Material | Tinned Electrolytic Copper | High purity, corrosion-resistant |
| Conductor Construction | Class 5 (Very Fine Stranded) | VDE 0295 / IEC 60228 |
| Inner Semiconductive Layer | Semiconductive tape over conductor | Electrical field smoothing |
| Insulation Material | EPR 3GI3 Quality Rubber Compound | VDE 0207 Part 20 |
| Outer Semiconductive Layer | Inner and outer semiconductive rubber | Enhanced field control |
Earth Conductors
| Component | Specification |
|---|---|
| Conductor Material | Tinned Copper |
| Construction | Class 5, Split into 3 parts |
| Configuration | Distributed in outer interstices |
| Covering | Semiconductive layer |
Core Assembly and Sheath System
Central Filler
Material: Semiconductive compound on textile polyester support
Function: Maintains cable geometry and provides mechanical support
Core Assembly
Configuration: Twisted cores with split earth conductor
Separator: Semiconductive tape wound on twisted cores
Lay Length: Optimized for flexibility (typically 7 × core diameter)
Inner Sheath
Material: GM1b quality rubber compound
Standard: VDE 0207 Part 21
Thickness: According to VDE 0250 Part 813 (Table 2)
Outer Sheath
Material: 5GM3 quality rubber compound
Properties: Flame retardant, oil resistant, weather resistant
Standard: VDE 0207 Part 21
Anti-Torsion Protection: Advanced cable designs incorporate polyester anti-torsion braids between the inner and outer sheaths. This reinforcement provides protection from both transverse and longitudinal stress, ensuring cable integrity during complex reeling operations.
Compliance with International Standards
The (N)TSCGEWÖU cable demonstrates comprehensive compliance with rigorous international electrical and safety standards:
Key Standards Explained
- DIN VDE 0250 Part 813: The primary standard for trailing cables used in power installations, specifically addressing cables, wires, and flexible cords for mining and material handling applications.[5] This German national standard has achieved worldwide acceptance for demanding flexible cable applications.
- VDE 0295 / IEC 60228: Defines conductor classes and construction requirements. Class 5 conductors provide the flexibility necessary for continuous reeling operations.
- VDE 0207 Parts 20 & 21: Specifies rubber compound quality requirements for insulation (3GI3) and sheath materials (GM1b, 5GM3), ensuring consistent material performance.
- VDE 0298 Parts 3 & 4: Governs current rating calculations and bending radius requirements, critical for proper cable sizing and installation.
- IEC 60332-1-2: Flame retardant testing standard ensuring the cable will not propagate fire under specified test conditions.[6]
- IEC 60811-2-1: Testing methods for cable materials, including oil resistance and ozone resistance verification.
- HD 22.16: European harmonized standard for cable behavior in water and wet environments.
Regulatory Compliance Note: For mining applications in the United States, cables must meet Mine Safety and Health Administration (MSHA) requirements in addition to electrical standards.[7] Ensure proper documentation and certification before deployment in regulated mining environments.
Electrical and Thermal Specifications
Electrical Working Data
| Parameter | 3.6/6 kV | 6/10 kV | 8.7/15 kV | 12/20 kV |
|---|---|---|---|---|
| Nominal Rated Voltage U₀/U | 3.6/6 kV | 6/10 kV | 8.7/15 kV | 12/20 kV |
| Test Voltage (AC) | 11 kV | 17 kV | 24 kV | 29 kV |
| Maximum AC Voltage | 4.2/7.2 kV | 6.9/12 kV | 10.4/18 kV | 13.9/24 kV |
| Electrical Field Control | Inner and outer semiconductive layers extruded in single pass with insulation | |||
| Current Rating | According to VDE 0298 Part 4 | |||
Thermal Working Data
| Parameter | Temperature (°C) |
|---|---|
| Maximum Working Temperature (Conductor) | 90°C |
| Maximum Short Circuit Temperature | 250°C |
| Ambient Temperature (Static Condition) | -40°C to +80°C |
| Ambient Temperature (Flexible Operation) | -25°C to +80°C |
Mechanical Working Data
| Parameter | Specification |
|---|---|
| Bending Radius (Minimum) | According to VDE 0298 Part 3 (typically 15-20 × cable diameter) |
| Maximum Tensile Load (Normal Operation) | 20 N/mm² (based on total phase conductor cross-section) |
| Maximum Tensile Load (Acceleration) | Up to 30 N/mm² |
| Minimum Distance (S-Type Directional Changes) | 20 × D (where D = cable diameter) |
Sample Cable Dimensions (3.6/6 kV Voltage Class)
| Cores × Conductor Cross Section | Min Overall Ø (mm) | Max Overall Ø (mm) | Approx. Weight (kg/km) | Max Tensile Load (N) |
|---|---|---|---|---|
| 3 × 25 + 3 × 25/3 | 36.8 | 39.9 | 2580 | 1500 |
| 3 × 50 + 3 × 25/3 | 39.4 | 46.0 | 3710 | 3000 |
| 3 × 95 + 3 × 50/3 | 42.7 | 55.8 | 5880 | 5700 |
| 3 × 150 + 3 × 70/3 | 46.3 | 66.0 | 8690 | 9000 |
| 3 × 185 + 3 × 95/3 | 47.6 | 67.9 | 9890 | 11100 |
Note: Cable dimensions may vary slightly depending on manufacturer and specific construction details. Always consult factory specifications for precise measurements.
Safety Thresholds and Requirements
⚠️ Critical Safety Notice
Mining operations present unique electrical hazards. According to the U.S. Bureau of Labor Statistics, the mining industry has an electrical fatality rate approximately 8 to 12 times that of other U.S. industries, with almost three-quarters of mine-related electrical injuries involving contact with wiring and electrical components.[8]
Electrical Safety Parameters
- Voltage Rating Compliance: Never exceed the maximum AC voltage specified for each cable rating (e.g., 7.2 kV maximum for 3.6/6 kV cable)
- Insulation Resistance: Regular testing required to verify insulation integrity; minimum values per VDE standards
- Ground Fault Protection: Install sensitive ground fault relays with instantaneous trip settings of 125 mA or less on all mining equipment.[9]
- Grounding System: Split earth conductors must be properly connected to equipment frames and grounding systems
Mechanical Safety Limits
Tensile Stress
Maximum 20 N/mm² during normal operation
Up to 30 N/mm² during acceleration (consult manufacturer)
Critical: Exceeding these limits can cause conductor damage
Bending Radius
Minimum 15× cable diameter (VDE 0298 Part 3)
For frequent flexing: 20× cable diameter recommended
Warning: Sharp bends can damage semiconductive layers
Temperature Limits
Conductor: Maximum 90°C continuous operation
Short circuit: Maximum 250°C (5 seconds)
Danger: Overheating degrades insulation rapidly
Installation Environment
Static: -40°C to +80°C ambient
Flexible: -25°C to +80°C ambient
Caution: Low temperatures reduce flexibility
Chemical and Environmental Safety
- Oil Exposure: Cable is oil-resistant per IEC 60811-2-1, but prolonged submersion in aggressive chemicals should be avoided
- Ozone Resistance: Rubber compounds are ozone-resistant, suitable for outdoor use in high-altitude or industrial areas
- UV Resistance: Outer sheath provides weather resistance for both indoor and outdoor applications
- Water Ingress: While designed for wet environments, cable terminations must be properly sealed to prevent water entry
Regulatory Compliance Requirements
In the United States, all electrical equipment and cables used in mines must be documented and submitted to the Mine Safety and Health Administration (MSHA) for certification approval.[10] Key requirements include:
- Detailed electrical diagrams showing cable routes and major electrical assets
- Clear marking and documentation of hidden or buried cables
- Flame-resistant cable certification for underground applications
- Proper grounding and bonding documentation
- Regular inspection and maintenance records
Precautions for Use
Installation Precautions
🔧 Pre-Installation Safety Checks
- Lockout/Tagout Procedures: Always de-energize equipment before cable installation or maintenance. Only work on energized cables when absolutely necessary and with properly rated electrical gloves.[11]
- Cable Inspection: Examine entire cable length for damage during transit; reject any cable with visible insulation damage
- Environmental Assessment: Evaluate mine environmental conditions including dust, gases, humidity, and temperature extremes that could affect cable performance.[12]
- Compatibility Verification: Ensure connectors, terminations, and equipment voltage ratings match cable specifications
Handling and Storage
- Storage Temperature: Store in dry location at temperatures between -5°C and +35°C
- Drum Handling: Use appropriate lifting equipment; never drop or impact cable drums
- Unwinding: Rotate drum during cable unwinding to prevent twisting and kinking
- Coil Storage: If stored in coils, lay flat to prevent compression damage to conductors
- Protection from Contaminants: Keep cable ends sealed until ready for termination to prevent moisture ingress
Installation Best Practices
Cable Routing
- Avoid sharp edges and rough surfaces
- Use cable protectors in high-traffic areas
- Maintain proper clearances from hot surfaces
- Route away from moving equipment paths where possible
Termination Guidelines
- Use only approved cable connectors and termination kits
- Follow manufacturer’s termination instructions exactly
- Ensure semiconductive layers are properly removed and prepared
- Apply proper torque to compression connections
Reeling System Setup
- Verify drum diameter meets minimum bending radius requirements
- Ensure proper cable guide alignment
- Set appropriate tension controls
- Install anti-rotation devices as needed
Grounding Connection
- Connect all three earth conductor segments properly
- Verify continuity of earth conductors
- Ensure low-resistance grounding path
- Test ground fault protection systems
Operational Precautions
- Load Monitoring: Never exceed rated current capacity; consider derating factors for ambient temperature and bundling
- Mechanical Stress: Monitor cable during operation for excessive sag, twisting, or abnormal wear patterns
- Inspection Frequency: Conduct regular visual inspections for cable damage, especially after incidents or in high-stress applications. Implement routine maintenance schedules to identify wear before failures occur.[13]
- Movement Coordination: Ensure cable reeling speed is synchronized with equipment travel speed
- Environmental Monitoring: In mining environments with flammable gases or dust, use only certified explosion-proof electrical equipment and maintain proper ventilation.[14]
Documentation Requirements
Maintain comprehensive records including:
- Cable installation date and location
- Initial electrical testing results (insulation resistance, continuity, etc.)
- Inspection and maintenance logs
- Any repairs or modifications performed
- Equipment electrical diagrams and cable routing plans
Common Problems and Solutions
Troubleshooting Guide
Problem: Insulation Breakdown
Symptoms: Ground faults, reduced insulation resistance, electrical tripping
Causes:
- Mechanical damage from sharp objects or pinching
- Exceeding voltage ratings
- Water ingress at damaged terminations
- Aging and environmental degradation
Solutions:
- Perform insulation resistance testing to locate fault
- Replace damaged cable section or entire cable if widespread
- Improve cable protection in vulnerable areas
- Verify proper voltage rating for application
Problem: Conductor Damage
Symptoms: Increased resistance, heating, intermittent power loss, complete failure
Causes:
- Excessive tensile stress beyond 30 N/mm²
- Repeated bending below minimum radius
- Corrosion (though tinned copper is resistant)
- Manufacturing defects (rare with quality cables)
Solutions:
- Measure conductor continuity and resistance
- Replace cable if conductor strands are broken
- Review mechanical installation to prevent recurrence
- Verify reeling system is not causing excessive stress
Problem: Overheating
Symptoms: Hot cable surface, thermal degradation of sheath, tripping on thermal protection
Causes:
- Overloading beyond current capacity
- Poor ventilation or cable bundling
- High ambient temperatures
- Poor connections creating high resistance
Solutions:
- Verify actual load current vs. cable rating
- Improve cable spacing and ventilation
- Check and tighten all terminations
- Consider larger conductor size if needed
Problem: Mechanical Wear
Symptoms: Visible outer sheath damage, exposed inner layers, reduced flexibility
Causes:
- Abrasion against rough surfaces or sharp edges
- Improper cable support or routing
- Running over by mobile equipment
- Excessive exposure to UV or harsh chemicals
Solutions:
- Use heavy-duty cable covers and protective trunking in vulnerable areas[15]
- Reroute cable to avoid high-traffic areas
- Install cable guides and support systems
- Replace severely worn cables before insulation is compromised
Additional Common Issues
Connector and Termination Failures
Issue: Intermittent connections, arcing, overheating at terminations
Prevention:
- Use only compatible, rated connectors approved for mining applications
- Implement keyway coding or padlocking to prevent connection of incompatible plugs and sockets[16]
- Follow manufacturer’s termination procedures precisely
- Apply proper dielectric stress relief at terminations
- Regularly inspect connections for signs of degradation
Moisture-Related Problems
Issue: Reduced insulation resistance, corrosion, electrical tracking
Prevention:
- Ensure all cable ends and terminations are properly sealed
- Use heat-shrink or cold-shrink sealing systems
- Verify cable entry glands are properly tightened
- In extremely wet environments, consider additional cable protection
- Perform regular insulation resistance testing to detect moisture ingress early
Advanced Troubleshooting Techniques
- Time Domain Reflectometry (TDR): Locates cable faults precisely along cable length
- Partial Discharge Testing: Identifies insulation degradation before complete failure
- Thermal Imaging: Detects hot spots indicating overloading or poor connections
- Tan Delta Testing: Assesses insulation condition in medium voltage cables
- Visual Inspection Under UV Light: May reveal surface tracking or corona discharge
When to Replace vs. Repair
Replace Immediately If:
- Insulation is penetrated to conductors
- Semiconductive layers are damaged
- Multiple conductor strands are broken
- Cable has been subjected to short circuit currents
- Visible evidence of internal water contamination
- Cable age exceeds expected service life (typically 15-20 years depending on usage)
May Be Repairable:
- Minor outer sheath damage with intact inner sheath
- Single damaged termination (others intact)
- Superficial abrasion not penetrating to insulation
Important: Always consult with qualified electrical engineers or cable manufacturers for guidance on complex cable faults[17], particularly in critical mining applications where safety is paramount.
Contact Information
For technical inquiries, quotations, or expert consultation on mining cable applications, please contact Anhui Feichun Special Cable Co., Ltd.
Sales & Technical Support
International Sales Hotline:
+86 13855123218
Email Contacts:
Company Information
Company Name:
Anhui Feichun Special Cable Co., Ltd.
安徽飞纯特种电缆有限公司
Specialization:
Mining Cables, Reeling Cables, Crane Cables, Port Machinery Cables, Medium Voltage Power Cables
Custom Solutions
We offer customized cable solutions tailored to your specific mining and industrial applications:
- Application engineering support
- Cable sizing calculations
- Custom voltage ratings
- Special conductor configurations
- Fiber optic integration
- Cold weather formulations
References and Citations
- Eland Cables. “DIN VDE 0250 Standard Cable.” https://www.elandcables.com
- Prysmian Group. “PROTOLON(SMK) (N)TSCGEWOEU Medium Voltage Reeling Cables.” Technical Documentation, 2016.
- Product Specification Sheet. “TSCGEWÖU Cable Electrical Field Control Systems.” VDE 0250 Part 813.
- Tratos Group. “TRATOSFLEX ESDB Medium Voltage Power Cables.” https://tratosgroup.com
- DIN Media. “DIN VDE 0250-813:1985-05 – Cables, Wires and Flexible Cords for Power Installation; Trailing Cable.” https://www.dinmedia.de
- International Electrotechnical Commission. “IEC 60332-1-2: Tests on Electric and Optical Fibre Cables Under Fire Conditions.”
- Amphenol TPC Wire and Cable. “Avoiding MSHA Citations: Choosing the Right Wire and Cable in Mining.” https://www.tpcwire.com, January 2025.
- EC&M Magazine. “Managing Electrical Safety in Mines.” https://www.ecmweb.com
- Mine Safety and Health Administration. “Electrical Safety Alert.” December 2016.
- OmniCable. “Electrical Safety in Mines: Challenges & Precautions.” https://www.omnicable.com, 2019.
- ISHN. “Mine Safety Agency Issues Electrical Safety Alert.” https://www.ishn.com, December 2016.
- Leaf Electrical Safety. “Electrical Safety in the Mining Industry: All You Need to Know.” https://leafelectricalsafety.com, April 2025.
- Znergy Cable. “How Do You Troubleshoot Mining Cable Faults and Failures?” https://znergycableau.wixsite.com, April 2024.
- GracePort. “Why Mining is One of the Most Dangerous Industries for Electrical Safety.” https://www.graceport.com
- RS Australia. “Cable Management in Harsh Mining Conditions.” https://au.rs-online.com, February 2024.
- Becker Mining USA. “Essential Tips for Electrical Safety in Mines.” https://www.beckersmcusa.com
- Cable Manufacturers’ Technical Guidelines. “Expert Consultation for Mining Cable Applications.” Industry Best Practices, 2025.
