1. Introduction / 概述

In indoor overhead crane (bridge crane) installations, flat festoon cables serve as the lifeline that delivers electrical power and control signals from a fixed junction point to the moving crane bridge or trolley. Two cable designations frequently appear in procurement specifications across Europe and Asia: the Nexans-branded RHEYFLAT®-N NGFLGOEU-J and the generic-designation (N)GFLGöu (also written NGFLGöu or NGFLGOEU). Although both designations ultimately trace back to the same DIN VDE construction philosophy, meaningful differences in material formulation, quality control, and brand-specific optimizations can influence service life, maintenance intervals, and total cost of ownership.

在室内桥式起重机（行车）安装中，扁平滑触线电缆是将电力和控制信号从固定接线点传输到移动桥架或小车的关键线路。在欧洲和亚洲的采购规范中，两种电缆型号经常出现：耐克森品牌的 RHEYFLAT®-N NGFLGOEU-J 和通用型号 (N)GFLGöu。虽然两者在 DIN VDE 结构体系上同根同源，但在材料配方、质量控制和品牌优化方面的差异可能影响使用寿命、维护周期和总拥有成本。

This article provides a side-by-side technical assessment aimed at facility engineers, crane OEMs, and procurement teams who must choose between these two options for indoor festoon systems specifically. We cite manufacturer datasheets, VDE standards, and independent distributor specifications as primary evidence.

本文面向设施工程师、起重机 OEM 和采购团队，提供侧面技术对比，帮助在室内滑触线系统中做出选择。我们引用制造商数据表、VDE 标准和独立经销商规格作为主要依据。

2. Designation & Naming Convention / 型号命名规则

Understanding the German DIN letter-code system is essential before comparing specifications. The designation (N)GFLGöu is constructed according to DIN VDE 0250 coding rules, where each letter segment encodes a specific material or construction feature. Nexans uses NGFLGOEU-J as the standardized type string, with RHEYFLAT®-N as its registered trade name. The parenthetical “(N)” indicates the cable may carry a VDE registration mark when produced by a VDE-licensed manufacturer.

理解德国 DIN 字母编码体系是对比规格的前提。(N)GFLGöu 的型号命名遵循 DIN VDE 0250 编码规则，每个字母段编码特定的材料或结构特征。耐克森使用 NGFLGOEU-J 作为标准型号字符串，RHEYFLAT®-N 为其注册商标名。括号中的”(N)”表示该电缆在具备 VDE 许可的制造商生产时可带有 VDE 注册标志。

3. Cable Construction / 电缆结构

3.1 Conductor / 导体

Both cables employ bare copper stranded conductors conforming to IEC 60228 / DIN VDE 0295. The Nexans RHEYFLAT®-N specifies Class 5 conductors across the full cross-section range, whereas generic (N)GFLGöu cables from other manufacturers typically use Class 6 for cross-sections up to 25 mm² and Class 5 above 25 mm². Class 6 conductors have finer individual wire diameters, resulting in slightly higher flexibility but marginally increased DC resistance per kilometer.

两种电缆均使用符合 IEC 60228 / DIN VDE 0295 的裸铜绞合导体。耐克森 RHEYFLAT®-N 在全截面范围内指定 Class 5 导体，而其他制造商的通用 (N)GFLGöu 通常在 25mm² 以下使用 Class 6，25mm² 以上使用 Class 5。Class 6 导体单丝直径更细，柔韧性略高，但每公里直流电阻略大。

Nexans further optimizes conductor lay lengths using S/Z stranding patterns specifically engineered for festoon bending cycles. As documented by CSE Distributors, Nexans rope-lay conductors are designed so that bending stability remains high and the conductor shape stays round and circular even after extended cyclical operation.

耐克森进一步优化了导体绞合节距，采用专为滑触线弯曲循环设计的 S/Z 绞合模式。据 CSE Distributors 资料记载，耐克森束绞导体经过设计，即使在长期循环运行后仍能保持高弯曲稳定性和圆形截面。

3.2 Insulation / 绝缘层

The insulation in both cables is Ethylene Propylene Rubber (EPR), designated as type 3GI3 rubber compound in VDE terminology. EPR provides excellent dielectric strength retention at elevated temperatures and is inherently resistant to ozone degradation — a critical property in indoor industrial environments where electrical discharge from overhead conductor bars or variable-frequency drives (VFDs) can generate localized ozone.

两种电缆的绝缘层均为乙丙橡胶（EPR），在 VDE 术语中标记为 3GI3 型橡胶化合物。EPR 在高温下具有优异的介电强度保持性，并且本身具有耐臭氧降解性 —— 这在变频器（VFD）可能产生局部臭氧的室内工业环境中是至关重要的特性。

3.3 Outer Sheath / 外护套

Both types use Chloroprene Rubber (CR / Neoprene) for the outer sheath, providing oil resistance, UV stability, and flame retardancy. The Nexans RHEYFLAT®-N sheath is described as having moisture, UV, and ozone resistance simultaneously, with flame-retardant performance verified according to IEC 60332-1. Generic (N)GFLGöu cables also reference Neoprene sheathing, though the specific compound grade may vary between manufacturers.

两种类型均采用氯丁橡胶（CR / 氯丁胶）外护套，提供耐油、耐紫外线和阻燃性能。耐克森 RHEYFLAT®-N 的护套同时具备防潮、抗紫外线和耐臭氧性能，阻燃性能按 IEC 60332-1 验证。通用 (N)GFLGöu 电缆也采用氯丁橡胶护套，但具体化合物等级可能因制造商而异。

4. Electrical & Thermal Parameters / 电气与热参数

Both cable families share the same fundamental voltage rating of 300/500 V (U₀/U) for AC applications. This voltage class is standard for festoon power-supply cables feeding crane motors, contactors, and pendant controls within the framework of DIN VDE 0113 (safety of machinery — electrical equipment).

两种电缆系列的基本额定电压均为 300/500 V（U₀/U），适用于交流应用。该电压等级是符合 DIN VDE 0113（机械安全 — 电气设备）框架的滑触线供电电缆标准。

A notable distinction lies in how each manufacturer specifies extended voltage capability. Üntel’s (N)GFLGöu datasheet documents a maximum operating AC voltage of 0.7/1.2 kV and a maximum DC operating voltage of 0.9/1.8 kV, with an AC test voltage of 3.5 kV. Nexans specifies a standard test voltage of 2.0 kV at 50 Hz for the RHEYFLAT®-N. This suggests the Üntel-type (N)GFLGöu may use a thicker insulation wall or higher-grade EPR compound to achieve the elevated voltage margin, which could be advantageous in applications where VFD-induced voltage spikes are a concern.

两者的显著区别在于最大工作电压的规范。Üntel 的 (N)GFLGöu 数据表标明最大交流工作电压 0.7/1.2 kV、最大直流工作电压 0.9/1.8 kV、交流测试电压 3.5 kV。耐克森 RHEYFLAT®-N 规定标准测试电压为 2.0 kV / 50 Hz。这表明 Üntel 型 (N)GFLGöu 可能使用更厚的绝缘壁或更高级的 EPR 化合物以实现更高电压裕度，这在变频器感应电压尖峰场景中具有优势。

5. Mechanical Performance / 机械性能

Mechanical endurance is arguably the most critical differentiator for festoon cables, since the cable experiences repetitive single-plane bending with every crane traversal. Both cable types are designed exclusively for bending in one plane — the defining characteristic of flat festoon cables versus round reeling cables that must handle combined bending and torsion.

机械耐久性可以说是滑触线电缆最关键的差异化指标，因为电缆在每次起重机移动时都经历重复的单平面弯曲。两种电缆类型均设计为仅在一个平面内弯曲 —— 这是扁平滑触线电缆与需要同时承受弯曲和扭转的圆形卷筒电缆的本质区别。

Both cables support a maximum festoon travel speed of 180 m/min, which exceeds the requirements of virtually all standard-duty and heavy-duty indoor overhead cranes. Per the Crane Manufacturers Association of America (CMAA) classifications, even Class E (severe service, 20+ lifts/hour) installations typically do not exceed 150 m/min bridge travel speed.

两种电缆均支持最大滑触线行进速度 180 m/min，超过了几乎所有标准和重载室内桥式起重机的要求。根据美国起重机制造商协会（CMAA）分类，即使是 E 级（严重工况，每小时 20 次以上起吊）安装，桥架行进速度通常也不超过 150 m/min。

Neither cable type is suitable for drum reeling applications. This is explicitly stated in the Üntel datasheet as “No application” for gantry/reeling operation, and the Nexans product literature similarly limits RHEYFLAT®-N to festoon and e-chain systems only. Facilities requiring combined reeling and festoon capability should consider alternatives such as the Nexans BUFLEX® or RHEYCORD® series.

两种电缆类型均不适用于卷筒卷绕应用。Üntel 数据表明确标注卷筒操作”无此应用”，耐克森产品文献同样将 RHEYFLAT®-N 限于滑触线和拖链系统。需要兼具卷绕和滑触线能力的设施应考虑耐克森 BUFLEX® 或 RHEYCORD® 系列等替代方案。

6. Applicable Standards & Certifications / 适用标准与认证

Both cables are designed within the German DIN VDE 0250 framework — the globally recognized benchmark for rubber-sheathed flexible cables used in crane and material handling equipment. As Eland Cables notes, Germany is the only country to have issued dedicated design regulations for flexible electrical cables covering cranes and handling equipment, which is why DIN VDE 0250 has achieved worldwide acceptance as the de-facto standard for this cable class.

两种电缆均在德国 DIN VDE 0250 框架内设计 —— 这是全球公认的起重机和物料搬运设备柔性橡胶护套电缆基准标准。正如 Eland Cables 指出的，德国是唯一一个为起重机和搬运设备柔性电缆制定了专门设计法规的国家，这也是 DIN VDE 0250 作为该电缆类别事实标准获得全球认可的原因。

7. Application Scenario Analysis for Indoor Festoon Systems / 室内滑触线系统应用场景分析

7.1 Light-to-Medium Duty Indoor Cranes (CMAA Class A–C) / 轻中型室内起重机

For standby, light, and moderate service cranes — typical in assembly plants, maintenance bays, and warehouses — both cable types are technically equivalent. The operating duty cycle is low enough that material fatigue differences are unlikely to manifest within the expected 8–12 year service window. In these scenarios, the generic (N)GFLGöu cable often represents the more cost-effective choice, as the Nexans brand premium may not yield proportional return on investment.

对于备用、轻型和中型工况的起重机 —— 常见于装配车间、维修间和仓库 —— 两种电缆在技术上等效。运行负荷周期足够低，材料疲劳差异不太可能在预期 8–12 年服务期内显现。在此场景下，通用 (N)GFLGöu 电缆通常更具成本效益。

7.2 Heavy-to-Severe Duty Indoor Cranes (CMAA Class D–F) / 重型至严苛工况室内起重机

For continuous or severe-service cranes in steel mills, automotive stamping lines, or container maintenance halls, the Nexans RHEYFLAT®-N may justify its premium through several advantages: the VDE-registered guarantee of consistent compound quality, Nexans’ optimized conductor lay geometry for extreme bending cycles, and a broader range of available core counts (up to 36 cores vs. typically 24 in generic offerings) that can reduce the number of parallel cable runs in complex control architectures.

对于钢厂、汽车冲压生产线或集装箱维修车间中的连续或严苛工况起重机，耐克森 RHEYFLAT®-N 可通过以下优势证明其溢价合理性：VDE 注册保证一致的化合物质量、针对极端弯曲循环优化的导体绞合几何结构，以及更广泛的可用芯数范围（最多 36 芯，通用型通常为 24 芯），可减少复杂控制架构中的并行电缆敷设数量。

7.3 Electrically Noisy Environments (VFD-Heavy Installations) / 电气噪声环境（变频器密集安装）

Where electromagnetic compatibility is a concern — such as installations with multiple variable-frequency drives on the same busbar — neither unscreened cable is ideal. Both Nexans and the generic specification offer screened variants: the Nexans RHEYFLAT®-N (N)GFLCGOEU-J features a Tinned Copper Wire Braid (TCWB) screen, while the generic equivalent is designated (N)GFLCGöu with a similar copper braid screen. For indoor cranes with VFD motor drives, specifying the screened variant is strongly recommended regardless of brand.

在电磁兼容性受关注的场合 —— 如同一母线上有多台变频器的安装环境 —— 两种无屏蔽电缆均非理想选择。耐克森和通用规格均提供屏蔽型号：耐克森 RHEYFLAT®-N (N)GFLCGOEU-J 配备镀锡铜丝编织屏蔽层，通用等效型号为 (N)GFLCGöu。对于采用变频电机驱动的室内起重机，无论品牌如何，强烈建议指定屏蔽型号。

7.4 Temperature Considerations / 温度考量

An interesting specification nuance: the Üntel (N)GFLGöu datasheet specifies a mobile operating range of −35°C to +90°C, while the Nexans RHEYFLAT®-N (as documented by the Olex/Nexans industrial catalog) specifies a mobile surface temperature range of −35°C to +80°C. For purely indoor applications in climate-controlled or semi-controlled facilities, this 10°C difference at the upper end is unlikely to be significant. However, in non-air-conditioned industrial buildings in tropical or arid regions where ambient temperatures can approach 50°C, the additional thermal headroom of the generic (N)GFLGöu may be relevant.

一个有趣的规格细微差别：Üntel (N)GFLGöu 数据表指定移动工作温度范围为 −35°C 至 +90°C，而耐克森 RHEYFLAT®-N（据 Olex/Nexans 工业目录）指定移动表面温度范围为 −35°C 至 +80°C。对于温控或半温控设施中的纯室内应用，上限的 10°C 差异通常无关紧要。但在热带或干旱地区无空调的工业建筑中，环境温度可能接近 50°C 时，通用 (N)GFLGöu 的额外热裕度可能有实际意义。

8. Comprehensive Comparison Summary / 综合对比总结

9. Conclusion & Recommendation / 结论与建议

For the specific use case of indoor overhead crane festoon systems, both Nexans RHEYFLAT®-N and generic (N)GFLGöu cables are technically viable solutions. They share the same fundamental DIN VDE design heritage, identical voltage ratings, matching travel-speed capabilities, and comparable environmental resistance properties. The choice between them should be driven by the following decision factors:

对于 室内桥式起重机滑触线系统 的特定应用，耐克森 RHEYFLAT®-N 和通用 (N)GFLGöu 电缆在技术上均为可行方案。它们共享相同的 DIN VDE 设计传承、相同的额定电压、匹配的行进速度能力和可比的环境耐受性。选择应基于以下决策因素：

Choose RHEYFLAT®-N when: the project requires VDE-registered product certification for tender compliance; the crane operates in CMAA Class D–F severe service with extreme bending cycles; the control architecture demands more than 24 cores in a single flat cable; or the end-user has standardized on Nexans for lifecycle consistency.

选择 RHEYFLAT®-N 的情形： 项目要求 VDE 注册产品认证以满足招标合规；起重机在 CMAA D–F 级严苛工况下运行；控制架构需要单根扁平电缆超过 24 芯；或终端用户已标准化使用耐克森以保持全生命周期一致性。

Choose (N)GFLGöu when: cost optimization is a priority for standard-to-heavy duty applications; the slightly higher upper temperature limit (+90°C vs. +80°C mobile) is relevant for hot indoor environments; the higher AC test voltage (3.5 kV vs. 2.0 kV) provides a desired additional safety margin; or when sourcing from regional manufacturers offers logistical advantages.

选择 (N)GFLGöu 的情形： 标准至重型应用中成本优化为优先考虑；略高的上限温度（移动 +90°C vs. +80°C）对高温室内环境有实际意义；更高的交流测试电压（3.5 kV vs. 2.0 kV）提供所需的额外安全裕度；或从区域制造商采购具有物流优势。

Regardless of which cable is selected, engineers should always verify that the chosen product is accompanied by a manufacturer’s declaration of conformity referencing the specific DIN VDE clauses applicable to the installation, and should ensure that festoon trolley hardware, bending radii, and cable support intervals are specified in accordance with the cable manufacturer’s installation guidelines.

无论选择哪种电缆，工程师都应始终验证所选产品附有引用适用于该安装的特定 DIN VDE 条款的制造商符合性声明，并确保滑触线小车硬件、弯曲半径和电缆支撑间距按照电缆制造商的安装指南规定。

10. Contact Anhui Feichun Special Cable / 联系安徽飞纯特种电缆