电压等级技术分析：通用型(N)TSCGEWÖU电缆能否达到耐克森RHEYFIRM® 20/35kV的技术规格？
Voltage Ratings: RHEYFIRM® 30kV — Can Generic (N)TSCGEWÖU Match Nexans’ 20/35kV Rating?
电压等级技术分析：通用型(N)TSCGEWÖU电缆能否达到耐克森RHEYFIRM® 20/35kV的技术规格？
Anhui Feichun Special Cable Co., Ltd. 安徽飞纯特种电缆有限公司
1. Introduction to RHEYFIRM® Cable Technology / RHEYFIRM®电缆技术简介
The RHEYFIRM® series represents Nexans’ premium line of flexible high-voltage and medium-voltage reeling cables, engineered specifically for demanding industrial applications requiring exceptional mechanical stress resistance combined with reliable electrical performance. These cables are manufactured according to the stringent requirements of DIN VDE 0250 Part 813, which governs trailing cables with rated voltages from 0.6/1 kV up to 20/35 kV.
RHEYFIRM®系列是耐克森公司的高端柔性高压和中压卷筒电缆产品线，专门针对需要卓越机械应力耐受性和可靠电气性能的苛刻工业应用而设计。这些电缆按照DIN VDE 0250第813部分的严格要求制造，该标准规定了额定电压从0.6/1 kV至20/35 kV的拖曳电缆技术规范。
The designation (N)TSCGEWÖU follows German cable nomenclature standards, where each letter represents specific construction characteristics: flexible stranded tinned copper conductor, rubber insulation with semiconductive layers, braided copper screen, and rubber outer sheath with specific oil and flame resistance properties.
2. Voltage Rating Systems: Understanding Uo/U(Um) / 电压等级体系解析
Medium voltage cable ratings follow the international convention of expressing voltage as Uo/U(Um), where Uo represents the voltage between conductor and screen (phase-to-ground), U represents the voltage between phase conductors, and Um represents the maximum system voltage for which the cable may be used.
Key Voltage Terminology / 关键电压术语：
Uo = Rated power frequency voltage between conductor and earth/screen（导体与屏蔽层间的额定工频电压）
U = Rated power frequency voltage between phase conductors（相间额定工频电压）
Um = Maximum system voltage = 1.2 × U（最高系统电压）
| Uo/U Rating | Um (kV) | AC Test Voltage (kV) | Max. Operating AC (kV) | Application Category |
|---|---|---|---|---|
| 3.6/6 kV | 7.2 | 11 | 7.2 | Low-MV Mining |
| 6/10 kV | 12 | 17 | 12 | Standard Cranes |
| 8.7/15 kV | 17.5 | 24 | 17.5 | Heavy Equipment |
| 12/20 kV | 24 | 29 | 24 | Large Mobile Machinery |
| 18/30 kV | 36 | 43 | 36 | High-Power Applications |
| 20/35 kV | 42 | 50 | 42 | Maximum Rating |
表1：DIN VDE 0250-813和IEC 60502-2标准中压电压等级对照表
3. RHEYFIRM® 18/30kV vs. 20/35kV: Technical Differences / 技术差异分析
The Nexans RHEYFIRM® (SI) NTMCGCWOEUS series is typically manufactured with a maximum permissible operating voltage (Ubmax) of 36 kV for AC systems and 54 kV for DC systems, corresponding to the 18/30 kV rating class. The test voltage according to DIN VDE 0250 Part 813 is 43 kV AC.
3.1 Insulation Thickness Requirements / 绝缘厚度要求
According to IEC 60502-2, the nominal insulation thickness for EPR (Ethylene Propylene Rubber) insulated cables varies significantly with voltage rating. For medium voltage cables, the insulation thickness is the primary factor determining the voltage withstand capability.
| Voltage Rating Uo/U | Minimum Insulation (mm) | Nominal Insulation (mm) | Increase vs. 18/30kV |
|---|---|---|---|
| 6/10 kV | 3.4 | 3.4 | — |
| 8.7/15 kV | 4.5 | 4.5 | — |
| 12/20 kV | 5.5 | 5.5 | — |
| 18/30 kV | 8.0 | 8.0 | Baseline |
| 20/35 kV | 9.0 | 9.0–9.5 | +12.5–18.75% |
表2：EPR/HEPR绝缘电缆绝缘厚度对比（依据IEC 60502-2）
3.2 Test Voltage Requirements / 试验电压要求
The transition from 18/30kV to 20/35kV rating requires meeting significantly higher test voltage standards, which validates the integrity of the entire insulation system including semiconductive layers, main insulation, and the interface between insulation and metallic screening.
| Parameter | 18/30kV Class | 20/35kV Class | Increase |
|---|---|---|---|
| AC Test Voltage (routine) | 43 kV | 50 kV | +16.3% |
| Partial Discharge Test Voltage | 27 kV | 31.5 kV | +16.7% |
| Impulse Withstand (1.2/50 μs) | 170 kV | 200 kV | +17.6% |
| Maximum Operating Voltage Um | 36 kV | 42 kV | +16.7% |
表3：电气试验参数对比
4. Manufacturing Feasibility: Generic (N)TSCGEWÖU at 20/35kV / 制造可行性分析
The technical feasibility of manufacturing generic (N)TSCGEWÖU cables to match or exceed the Nexans RHEYFIRM® 20/35kV performance specifications depends on several critical manufacturing capabilities.
4.1 Key Manufacturing Requirements / 关键制造要求
To achieve 20/35kV rating compliance according to DIN VDE 0250-813 and IEC 60502-2 standards, the following technical specifications must be met:
| Component | Material/Specification | Standard Reference |
|---|---|---|
| Conductor | Tinned copper, Class 5 flexible, IEC 60228 | DIN VDE 0295 |
| Conductor Screen | Semiconductive EPR, ≤200 Ω·m | DIN VDE 0207-20 |
| Insulation | 3GI3 EPR compound, 9.0–9.5 mm thick | DIN VDE 0207-20 |
| Insulation Screen | Strippable semiconductive layer | DIN VDE 0207-20 |
| Metallic Screen | Copper wire braid/spiral wrap | DIN VDE 0250-813 |
| Inner Sheath | GM1b rubber compound | DIN VDE 0207-21 |
| Outer Sheath | 5GM5 PCP, oil & flame resistant | DIN VDE 0207-21 |
表4：20/35kV (N)TSCGEWÖU电缆结构规格
4.2 Anhui Feichun Manufacturing Capabilities / 安徽飞纯制造能力
Anhui Feichun Special Cable Co., Ltd. possesses the technical expertise and manufacturing infrastructure to produce (N)TSCGEWÖU medium voltage reeling cables meeting 20/35kV specifications. Our capabilities include:
安徽飞纯特种电缆有限公司具备生产符合20/35kV规格的(N)TSCGEWÖU中压卷筒电缆的技术专长和制造基础设施：
| Capability Area | Specification Range | Compliance Standard |
|---|---|---|
| Voltage Rating Range | 0.6/1 kV to 20/35 kV | DIN VDE 0250-813 |
| Conductor Cross-Section | 16 mm² to 400 mm² | IEC 60228 Class 5 |
| Core Configuration | 1-core to 6-core + control | Custom designs |
| Operating Temperature | -40°C to +90°C | DIN VDE 0298-4 |
| Reeling Speed | Up to 190 m/min | Application specific |
| Minimum Bending Radius | 12× to 15× OD | DIN VDE 0298-4 |
表5：飞纯制造能力矩阵
5. Quality Assurance & Testing Protocol / 质量保证与测试规程
Every 20/35kV rated cable manufactured by Anhui Feichun undergoes comprehensive type testing and routine testing in accordance with international standards to ensure full compliance with performance requirements.
| Test Category | Test Method | Acceptance Criteria |
|---|---|---|
| AC Voltage Withstand | 50 kV / 5 min | No breakdown |
| Partial Discharge | @31.5 kV (1.5×Uo) | <10 pC |
| Insulation Resistance | @90°C | >100 MΩ·km |
| Hot Set Test | 200°C / 15 min | Elongation <175% |
| Flame Retardance | EN 60332-1-2 | Self-extinguishing |
| Oil Resistance | EN 60811-2-1 | Per specification |
表6：20/35kV电缆测试规程
6. Application Scenarios / 应用场景
20/35kV rated (N)TSCGEWÖU cables are essential for high-power mobile equipment applications where standard 18/30kV ratings are insufficient to provide adequate safety margins or where system voltage requirements exceed 36kV Um.
| Application | Typical Power Range | Key Requirements |
|---|---|---|
| Ship-to-Shore Cranes (STS) | 2–8 MW | High flex cycles, salt spray resistance |
| Stacker Reclaimers | 1–5 MW | Abrasion resistance, long lengths |
| Mining Excavators | 3–15 MW | Oil resistance, mechanical toughness |
| Tunnel Boring Machines | 2–10 MW | Moisture resistance, flexibility |
| Ship Unloaders | 1–4 MW | Torsion resistance, UV stability |
表7：20/35kV卷筒电缆主要应用领域
7. Conclusion: Matching RHEYFIRM® Performance / 结论
Based on our technical analysis, generic (N)TSCGEWÖU cables can be manufactured to fully match or exceed Nexans RHEYFIRM® 20/35kV specifications, provided that manufacturers possess adequate quality control systems, utilize appropriate high-grade materials conforming to DIN VDE 0207 compound specifications, and conduct comprehensive type testing per DIN VDE 0250-813 and IEC 60502-2 requirements.
Anhui Feichun Special Cable Co., Ltd. has demonstrated capability to produce medium voltage reeling cables up to 30kV with construction meeting international standards, making the 20/35kV rating achievable through optimized insulation wall thickness and enhanced quality control protocols.
根据我们的技术分析，通用型(N)TSCGEWÖU电缆可以制造成完全匹配或超越耐克森RHEYFIRM® 20/35kV规格，前提是制造商具备充分的质量控制体系，使用符合DIN VDE 0207复合材料规范的高等级材料，并按照DIN VDE 0250-813和IEC 60502-2要求进行全面的型式试验。安徽飞纯特种电缆有限公司已证明有能力生产符合国际标准的高达30kV的中压卷筒电缆，通过优化绝缘壁厚和加强质量控制规程可实现20/35kV等级。
Contact Anhui Feichun Special Cable / 联系安徽飞纯特种电缆
References & Standards / 参考文献与标准
- DIN VDE 0250-813:1985 – Cables, wires and flexible cords for power installation; Trailing cable. VDE Verlag
- IEC 60502-2 – Power cables with extruded insulation for rated voltages from 6 kV up to 30 kV. IEC
- DIN VDE 0207-20 – Rubber insulating compounds for cables. DIN Media
- DIN VDE 0207-21 – Thermosetting sheath compounds for cables. DIN Media
- IEC 60228 – Conductors of insulated cables. IEC
- Nexans Deutschland GmbH – RHEYFIRM® (SI) NTMCGCWOEUS 18/30 kV Technical Data. Nexans Germany
- Tratos Group – DIN VDE 250 Part 813 Standard Overview. Tratos
- Eland Cables – IEC 60502 Standard Cable Technical Guide. Eland Cables
- CSE Industrial Electrical Distributors – RHEYFIRM® Cable Series. CSE Distributors
- EN 60332-1-2 – Tests on electric and optical fibre cables under fire conditions. CENELEC
