Nexans RHEYFIRM® (RS) 与 (N)TSCGEWÖU：龙门起重机抗拉强度和抗扭性能的详细对比
Nexans RHEYFIRM® (RS) vs. (N)TSCGEWÖU: A Detailed Comparison of Tensile Strength and Torsion Resistance for Gantry Cranes
Nexans RHEYFIRM® (RS) 与 (N)TSCGEWÖU：龙门起重机抗拉强度和抗扭性能的详细对比
Introduction 简介
Gantry crane systems operating in ports, shipyards, and container terminals demand cables capable of withstanding extreme mechanical stresses, including high tensile forces and continuous torsional movements. The selection of appropriate reeling cables directly impacts operational efficiency, maintenance costs, and safety standards in material handling operations. This comprehensive technical analysis compares two leading cable solutions manufactured to German DIN VDE 0250 standards: the Nexans RHEYFIRM® (RS) flat cable series and the (N)TSCGEWÖU medium-voltage cable family.
龙门起重机系统在港口、造船厂和集装箱码头运行时，需要能够承受极端机械应力的电缆，包括高拉力和持续的扭转运动。适当选择卷筒电缆直接影响物料搬运作业中的运营效率、维护成本和安全标准。本综合技术分析比较了两种按德国DIN VDE 0250标准制造的领先电缆解决方案：Nexans RHEYFIRM®（RS）扁电缆系列和（N）TSCGEWÖU中压电缆系列。
Both cable types are specifically engineered for Rail Mounted Gantry cranes (RMG), Ship-to-Shore cranes (STS), stacker-reclaimers, and other heavy mobile equipment subjected to frequent winding, unwinding, and multi-directional deflection. The critical performance parameters examined in this analysis include conductor tensile strength, cable torsion resistance, flexibility characteristics, and operational reliability under cyclic loading conditions.
Cable Overview and Standards 电缆概述和标准
Nexans RHEYFIRM® (RS) Cable Series
The RHEYFIRM® (RS) designation represents Nexans’ specialized flat cable construction optimized for reeling drum applications in port crane systems. The designation breakdown is as follows: RHEYFIRM®(RS)-FLAT (N)TSFLCGCWOEUS, where each component indicates specific construction features according to DIN VDE nomenclature standards.
Primary Applications 主要应用： Ship-to-Shore container cranes (STS), Rail Mounted Gantry cranes (RMG), ship unloaders, heavy-duty festoon systems, and hybrid power-data transmission requiring simultaneous medium-voltage power delivery and fiber-optic data transmission.
(N)TSCGEWÖU Cable Family
The (N)TSCGEWÖU cable designation represents a comprehensive medium-voltage cable family complying with DIN VDE 0250-813 and HD 620 S2 harmonized European standards. This cable type is manufactured by multiple specialized cable producers including Nexans, Tratos, and other certified manufacturers serving the global port equipment industry.
Configuration 配置： Available in 3+3 configuration (three power cores plus three protective earth cores) for medium voltage ranges: 3.6/6 kV, 6/10 kV, 8.7/15 kV, 12/20 kV, and 18/30 kV. Enhanced variants include integrated anti-torsion braids, fiber-optic cores (FO), and specialized sheathing for permanent water submersion or halogen-free tunnel applications.
Regulatory Standards Framework 监管标准框架
| Primary Standard 主要标准 | DIN VDE 0250-813 / DIN VDE 0250-814: Flexible cables for rated voltages up to 0.6/1 kV and medium voltage applications |
| Conductor Specification 导体规格 | DIN VDE 0295 Class 5 / IEC 60228 Class 5: Fine-stranded copper conductors optimized for flexibility |
| Insulation Materials 绝缘材料 | DIN VDE 0207-20: Ethylene-propylene rubber (EPR) insulation compounds; DIN VDE 0207-21: Synthetic thermosetting sheath compounds |
| Current Capacity 载流量 | DIN VDE 0298-4: Use of cables in power installations – Current carrying capacity calculations |
| Fire Performance 防火性能 | EN 60332-1-2: Tests on electric cables under fire conditions – Vertical flame propagation testing |
| European Harmonization 欧洲协调 | HD 620 S2: Distribution cables with extruded insulation for rated voltages 3.6/6 kV to 20.8/36 kV |
Tensile Strength Comparison 抗拉强度对比
Copper Conductor Tensile Properties 铜导体抗拉性能
According to technical specifications published by Nexans and verified by independent testing laboratories, copper conductors utilized in both RHEYFIRM® (RS) and (N)TSCGEWÖU cables are manufactured from high-purity oxygen-free copper meeting DIN VDE 0295 Class 5 or Class 6 standards. The mechanical properties of these conductors demonstrate the following characteristics under standardized testing conditions.
| Mechanical Property 机械性能 | RHEYFIRM® (RS) | (N)TSCGEWÖU | Testing Standard 测试标准 |
|---|---|---|---|
| Conductor Tensile Strength 导体抗拉强度 | 210 to 230 N/mm² | 210 to 230 N/mm² | IEC 60228, DIN VDE 0295 |
| Elongation at Break 断裂伸长率 | > 40% | > 40% | IEC 60228 |
| Electrical Conductivity 电导率 | > 58.0 m/Ωmm² | > 58.0 m/Ωmm² | IEC 60028 |
| Conductor Class 导体等级 | Class 5 (Class 6 optional) | Class 5 (Class 6 optional) | DIN VDE 0295 |
| Maximum Pulling Tension 最大拉力 | 20 N/mm² (without reinforcement) | 20 N/mm² (without reinforcement) | DIN VDE 0250 |
Cable-Level Tensile Performance 电缆级抗拉性能
While conductor-level tensile strength remains equivalent between the two cable types, the overall cable tensile performance differs substantially due to construction methodology and the presence of integrated strength members. The flat cable geometry of RHEYFIRM® (RS) inherently distributes tensile loads across a wider cross-sectional area, whereas the round construction of (N)TSCGEWÖU concentrates forces more centrally.
| Tensile Parameter 拉伸参数 | RHEYFIRM® (RS) | (N)TSCGEWÖU |
|---|---|---|
| Strength Member Integration 加强件集成 | Concentric mixed braid: tinned copper wires + high-tech polyamide yarn | Central core strength member (optional anti-torsion braid between layers) |
| Tensile Load Distribution 拉伸载荷分布 | Distributed across flat profile; reduced stress concentration | Centralized through core; higher local stress at conductor layer |
| Maximum Cable Tension 电缆最大拉力 | Optimized for high-speed reeling (200+ m/min horizontal) | Suitable for moderate to high-speed applications (150-300 m/min) |
| Strain Relief Method 应变消除方法 | Integrated polyamide yarn absorbs dynamic tensile shock loads | Central strength member withstands static and dynamic tension |
Reinforcement Core Specifications 加强芯规格
For applications involving heavy cable weights or high reeling speeds exceeding 200 meters per minute, both cable types can be manufactured with supplementary steel wire rope reinforcement cores. This configuration is particularly critical for gantry cranes operating with cable lengths exceeding 500 meters, where the cumulative cable weight generates substantial tensile forces on the conductor layers during rapid acceleration and deceleration cycles.
Torsion Resistance Analysis 抗扭性能分析
Torsional Stress in Gantry Crane Applications 龙门起重机应用中的扭转应力
Gantry crane cables experience continuous torsional stress due to multi-planar deflection during crane trolley movement, spreader rotation, and cable drum winding dynamics. According to DIN VDE 0250-814 testing protocols, cables must withstand torsional stress cycles of ±180°/meter for a minimum of 5 million cycles without conductor fracture or insulation degradation.
| Torsion Parameter 扭转参数 | RHEYFIRM® (RS) | (N)TSCGEWÖU | Performance Advantage 性能优势 |
|---|---|---|---|
| Construction Geometry 结构几何形状 | Flat profile (reduced torsional moment) | Round profile (standard torsional characteristics) | RHEYFIRM® (RS) |
| Anti-Torsion Element 防扭元件 | Polyester braid between inner and outer sheath | Optional anti-torsion braid (specify TSCGEWTOEUS variant) | RHEYFIRM® (RS) (standard feature) |
| Length of Lay Optimization 绞合节距优化 | ≤ 8x core diameter; optimized for multi-plane flexing | Standard optimization per DIN VDE 0250-813 | Equivalent |
| Torsion Cycle Rating 扭转循环额定值 | ≥ 5 million cycles at ±180°/m | ≥ 5 million cycles at ±180°/m (with anti-torsion braid) | Equivalent (when properly specified) |
| Deflection into Different Planes 不同平面的偏转 | Optimized for multi-directional movement | Suitable; enhanced with special variants | RHEYFIRM® (RS) |
| Twist Prevention 防扭转 | Flat design inherently resists twisting; reduced outer diameter minimizes torque | Round design requires anti-torsion layers for equivalent performance | RHEYFIRM® (RS) |
Torsional Stress Mechanisms 扭转应力机制
The flat cable geometry of RHEYFIRM® (RS) provides a significant mechanical advantage in torsion resistance compared to conventional round cables. When subjected to rotational forces, flat cables exhibit a lower polar moment of inertia, resulting in reduced torsional stress concentration at the conductor-insulation interface. This geometric property translates to extended service life in applications involving frequent cable rotation or twisting movements.
The (N)TSCGEWÖU cable family compensates for its round geometry through the integration of specialized anti-torsion braids positioned between the inner cable core and outer sheath layers. These braided reinforcement structures, typically constructed from high-strength polyester or aramid fibers, provide mechanical resistance to rotational deformation. However, this enhancement must be specifically ordered as the TSCGEWTOEUS or similar variant; standard (N)TSCGEWÖU constructions without the “T” designation (representing “torsion-resistant”) lack this critical feature.
Laboratory Testing Results 实验室测试结果
Industry Testing Standards 行业测试标准: Independent testing laboratories accredited under ISO/IEC 17025 conduct torsional fatigue testing according to DIN VDE 0250 Part 814 protocols. Test specimens undergo continuous rotation cycles at specified angles (typically ±180° per meter of cable length) while simultaneously subjected to rated current flow and environmental conditioning (temperature cycling, moisture exposure, mechanical vibration).
Typical Test Results 典型测试结果: RHEYFIRM® (RS) flat cables consistently demonstrate 20-30% longer service life in torsional fatigue testing compared to standard round cables of equivalent conductor cross-section and voltage rating. This performance advantage stems from the flat profile’s reduced torsional stress concentration and the inherent anti-twist properties of the geometry itself.
Flexibility and Bending Characteristics 柔韧性和弯曲特性
Minimum Bending Radius 最小弯曲半径
Cable flexibility represents a critical parameter for reeling drum applications, where cables undergo continuous winding and unwinding cycles around drum diameters that must balance compact crane design with acceptable cable stress levels. According to DIN VDE 0298 installation guidelines, the minimum bending radius during installation should not be less than 15 times the outer cable diameter for rubber-insulated cables during mobile use.
| Flexibility Parameter 柔韧性参数 | RHEYFIRM® (RS) | (N)TSCGEWÖU |
|---|---|---|
| Minimum Bending Radius (Installation) 最小弯曲半径（安装） | 15x outer diameter | 15x outer diameter |
| Minimum Bending Radius (Mobile Use) 最小弯曲半径（移动使用） | 12x outer diameter (flat profile advantage) | 15x outer diameter |
| Drum Diameter Suitability 卷筒直径适用性 | Suitable for compact drum designs; reduced space requirements | Standard drum requirements; slightly larger diameters recommended |
| Conductor Stranding 导体绞合 | Optimized length-of-lay for reeling applications; enhanced flexibility | Standard rope-lay construction per IEC 60228 Class 5 |
| Flex Life Cycles 弯曲寿命周期 | > 1 million bending cycles (typical STS/RMG applications) | > 800,000 bending cycles (depending on drum diameter and operational speed) |
Operational Speed Capabilities 运行速度能力
High-speed gantry crane operations in modern automated container terminals demand cables capable of withstanding rapid acceleration and deceleration while maintaining electrical integrity. According to technical documentation from major European port operators, automated STS cranes can achieve trolley speeds exceeding 240 meters per minute, with corresponding cable reeling speeds approaching 300 meters per minute in high-efficiency operations.
The RHEYFIRM® (RS) series has been specifically engineered for these extreme-performance applications. Documentation from ports worldwide indicates successful deployment in fully automated yards operating at speeds up to 300 meters per minute. The (N)TSCGEWÖU family, while suitable for high-speed operations (typically 150-250 m/min), generally requires more conservative drum diameter specifications and enhanced maintenance monitoring protocols when approaching the upper velocity ranges.
Application-Specific Recommendations 应用特定建议
Ship-to-Shore (STS) Container Cranes 岸桥集装箱起重机
For STS crane applications featuring super post-Panamax designs with lifting heights exceeding 50 meters and outreach spans beyond 65 meters, cable selection must prioritize tensile strength, torsion resistance, and reliability under continuous high-cycle operations. The RHEYFIRM® (RS) flat cable construction offers several operational advantages in this demanding environment.
| Recommended Solution 推荐方案 | RHEYFIRM®(RS)-FLAT (N)TSFLCGCWOEUS with optical fiber integration for data transmission; 6/10 kV or 8.7/15 kV ratings depending on crane power system architecture |
| Key Advantages 主要优势 | Flat profile reduces wind resistance at elevation; superior torsion resistance for spreader rotation; high-speed capability (240-300 m/min); integrated fiber-optics eliminate separate data cables |
| Installation Considerations 安装注意事项 | Drum diameter minimum 20x cable thickness; ensure proper cable guide systems to prevent edge damage; implement monitoring for cable temperature rise under heavy load cycles |
Rail Mounted Gantry (RMG) Cranes 轨道式龙门起重机
RMG crane systems operating in container yard stacking operations experience different mechanical stress profiles compared to STS cranes. The horizontal travel distances can extend to 400 meters or more, with frequent acceleration-deceleration cycles as the gantry crane services multiple container bay positions. Cable weight becomes a significant design factor at these extended lengths.
| Solution Options 解决方案选项 | Option A: (N)TSCGEWTOEUS medium voltage cable with anti-torsion braid and central strength member for lengths > 300m Option B: RHEYFIRM®(RS) flat cable for automated RMG applications requiring high-speed operations (> 200 m/min travel speed) |
| Selection Criteria 选择标准 | Cable weight per meter × total length determines tensile stress on conductor; automated high-speed RMGs favor RHEYFIRM® (RS); manual/semi-automated systems with moderate speeds perform well with (N)TSCGEWÖU |
| Maintenance Considerations 维护注意事项 | Implement cable tension monitoring systems for lengths > 500m; schedule visual inspections every 6 months for high-utilization cranes; monitor outer sheath for abrasion at cable guide contact points |
Rubber-Tired Gantry (RTG) Cranes 轮胎式龙门起重机
RTG cranes present unique challenges due to their cable reel systems and the necessity for cables to withstand continuous winding/unwinding cycles as the crane travels throughout the container yard. The cable drum mounting position (end-feed versus center-feed) significantly influences torsional stress patterns and cable life expectancy.
| Recommended Solution 推荐方案 | (N)TSCGEWÖU cable family with mandatory anti-torsion protection (specify TSCGEWTOEUS); medium voltage ratings typically 6/10 kV or 8.7/15 kV |
| Cable Drum Configuration 电缆卷筒配置 | Center-feed drum mounting reduces torsional stress compared to end-feed; hysteresis-type or magnetic coupling drum drives provide constant tension during travel |
| Service Life Optimization 使用寿命优化 | Implement cable replacement schedules based on operational hours; high-duty-cycle RTGs (≥18 hours/day) require inspection intervals of 3-4 months; monitor drum rotation alignment to prevent uneven cable wear |
Cost-Benefit Analysis 成本效益分析
Initial Investment Considerations 初始投资考虑
The RHEYFIRM® (RS) flat cable construction typically commands a 15-25% price premium compared to equivalent (N)TSCGEWÖU round cables of similar voltage rating and conductor cross-section. This premium reflects the more complex manufacturing process required for flat cable geometries, the integration of specialized anti-torsion elements as standard features, and the inclusion of fiber-optic transmission capabilities in many configurations.
Total Cost of Ownership (TCO) 总拥有成本
However, total cost of ownership calculations over a typical 10-15 year crane operational lifespan frequently favor the RHEYFIRM® (RS) solution for high-utilization applications. The extended service life resulting from superior torsion resistance and reduced stress concentration translates to fewer cable replacement cycles, reduced crane downtime during cable change-out procedures, and lower maintenance labor costs.
| TCO Factor 总拥有成本因素 | RHEYFIRM® (RS) | (N)TSCGEWÖU |
|---|---|---|
| Initial Cable Cost 初始电缆成本 | Higher (reference: 115-125%) | Lower (reference: 100%) |
| Average Service Life 平均使用寿命 | 7-10 years (high-duty STS/RMG) | 5-7 years (high-duty STS/RMG) |
| Replacement Frequency 更换频率 | 1-2 times per crane lifespan | 2-3 times per crane lifespan |
| Downtime Cost per Replacement 每次更换的停机成本 | $15,000-$30,000 USD (typical STS crane) | $15,000-$30,000 USD (typical STS crane) |
| Integrated Fiber-Optic Value 集成光纤价值 | Eliminates separate data cable; reduced installation complexity | Available as FO variant; similar benefits when specified |
Operational Efficiency Impact 运营效率影响
Beyond direct cost considerations, cable reliability directly impacts container terminal throughput metrics. Unplanned cable failures resulting in crane outages during peak operational periods can cost major container terminals between $50,000 and $150,000 USD per day in lost productivity, delayed vessel departures, and contractual penalties. The enhanced reliability profile of premium cable solutions provides insurance against these catastrophic cost events.
Contact Anhui Feichun Special Cable Co., Ltd. 联系安徽飞纯特种电缆有限公司
Company 公司: Anhui Feichun Special Cable Co., Ltd. (安徽飞纯特种电缆有限公司)
WhatsApp: +86 13855123218
Email (Technical Support 技术支持): [email protected]
Email (Sales 销售): [email protected] | [email protected]
Specialization 专业领域: DIN VDE 0250 compliant reeling cables, gantry crane cables, port equipment power distribution, medium voltage flexible cables, custom cable engineering for material handling systems
Manufacturing Capabilities 制造能力: We manufacture cables equivalent to Nexans RHEYFIRM® specifications and (N)TSCGEWÖU standards, with full compliance to DIN VDE, IEC, and HD European harmonized standards. Custom configurations available including anti-torsion reinforcement, fiber-optic integration, and specialized sheathing compounds.
Conclusion 结论
The selection between Nexans RHEYFIRM® (RS) and (N)TSCGEWÖU cable families for gantry crane applications requires careful analysis of operational parameters, duty cycles, environmental conditions, and total cost of ownership considerations. While both cable types provide excellent performance when properly specified and maintained, their distinct construction philosophies offer different advantages for specific applications.
The RHEYFIRM® (RS) flat cable design excels in high-speed automated container terminal operations where torsion resistance, multi-plane deflection capability, and extended service life justify the higher initial investment. The inherent anti-twist properties of the flat geometry, combined with the integrated polyamide reinforcement yarns, deliver superior performance in the most demanding STS and automated RMG applications operating at speeds exceeding 200 meters per minute.
The (N)TSCGEWÖU cable family, particularly when specified with anti-torsion braids and appropriate strength members, provides a cost-effective solution for moderate to high-duty crane operations. This cable type demonstrates particular strength in RTG applications, manual/semi-automated RMG systems, and operations where maximum operational speeds remain below 200 meters per minute. The round geometry facilitates straightforward drum winding, and the mature manufacturing processes ensure worldwide availability from multiple certified suppliers.
Ultimately, both cable solutions represent mature, proven technologies backed by decades of successful port operation globally. The optimal choice depends on specific crane configuration, operational duty cycle, maintenance philosophy, and long-term strategic considerations for terminal automation and throughput optimization.
References and Authoritative Sources 参考文献和权威来源
- Nexans Deutschland GmbH. “RHEYFIRM®(RS)-FLAT (N)TSFLCGCWOEUS – Technical Specifications.” Nexans Product Database. http://www.nexans.de/eservice/Germany-de_DE/navigate_22301/RHEYFIRM_RS_FLAT_N_TSFLCGCWOEUS.html
- Nexans. “Nexans’ RHEYFIRM (RS) Innovative Hybrid Medium Voltage Ship-to-Shore Cables for Cleaner Ports.” Nexans Press Release. https://www.nexans.de/eservice/Germany-en/navigatepub_148782_-11876/Nexans_RHEYFIRM_RS_innovative_hybrid_medium_voltag.html
- CSE Industrial Electrical Distributors. “RHEYFIRM®(RTS) (N)TSCGEWTOEUS Cable – Technical Data Sheet.” Product Specifications. https://www.cse-distributors.co.uk/cable/nexans-handling-cable/rheyfirmrts-ntscgewtoeus-cable.html
- CSE Industrial Electrical Distributors. “Nexans Conductors – Mechanical and Electrical Properties.” Technical Documentation. https://www.cse-distributors.co.uk/cable/nexans-cables/nexans-conductors/
- Tratos Group. “Crane Cables – TRATOSFLEX-ESDB® Reeling Cable.” Product Information. https://tratosgroup.com/products/cables-by-type/crane-cables/
- Feichun Special Cable Blogs. “What is DIN VDE 0250 Reeling Cables?” Technical Article. https://feichuncables.com/blog/what-is-din-vde-0250-reeling-cables/
- Feichun Special Cable Blogs. “What is DIN VDE 0250 Cable?” Technical Article. https://feichuncables.com/blog/what-is-din-vde-0250-cable/
- DIN Deutsches Institut für Normung. “DIN VDE 0250-814: Rubber Insulated Flexible Cables – Flexible Cables for Rated Voltages up to and Including 0.6/1 kV.” German Standard.
- International Electrotechnical Commission. “IEC 60228: Conductors of Insulated Cables.” International Standard.
- CENELEC. “HD 620 S2: Distribution Cables with Extruded Insulation for Rated Voltages from 3.6/6 (7.2) kV to 20.8/36 (42) kV.” Harmonized European Standard.
- Eland Cables. “Crane Cable | Festoon Cable – Technical Overview.” Product Guide. https://www.elandcables.com/electrical-cable-and-accessories/cables-by-type/crane-cable
- DGCRANE. “Overhead Crane Cables: Reliable, Durable, And Cost-Effective Solutions For Safe Power Transmission.” Technical Resource. https://www.dgcrane.com/overhead-crane-cables/
Disclaimer 免责声明: This comparative analysis is based on publicly available technical specifications, industry standards, and documented operational data from port authorities and crane manufacturers. Cable performance characteristics may vary depending on specific manufacturing variations, installation conditions, operational duty cycles, and environmental factors. Users should consult with cable manufacturers and qualified electrical engineers to determine optimal cable selection for specific applications. Anhui Feichun Special Cable Co., Ltd. manufactures cables complying with relevant DIN VDE and IEC standards; product specifications are subject to verification through technical consultation and sample testing.
