(N)TSCGECECWÖU 8.7/15kV 12/20kV TBM Reeling Cable

(N)TSCGECECWÖU Cable for Tunnel Boring Machine Reeling Drums

The (N)TSCGECECWÖU Cable is a medium voltage flexible cable for tunnel boring machines and tunnel power supply routes. It is intended for reeling drum operation where the cable is repeatedly wound, unwound and guided through confined construction areas. Compared with a fixed medium voltage cable, this design combines class 5 tinned copper conductors, rubber insulation, semiconductive field control, protective earth conductors and monitoring conductors in one moving cable system.

Engineering Value for TBM and Tunnel Projects

• Designed for drum movement: The cable is suitable for flexed operation on reeling drums, with a minimum bending radius of 10 x overall diameter in flexed use.
• Medium voltage field control: Semiconductive tape over the conductor and inner and outer semiconductive rubber layers on the insulation help control electrical stress in 8.7/15kV and 12/20kV circuits.
• Protective earth construction: Individual copper wire screens around the earth conductors support safer grounding in tunnel boring and mobile equipment supply systems.
• Monitoring conductor included: A copper wire screen over the inner sheath provides a monitoring function that can be integrated into project safety and cable supervision concepts.
• Built for tunnel conditions: Rubber sheathing, flame retardant performance and indoor/outdoor suitability make the cable practical for wet, abrasive and restricted construction environments.

Technical Specifications

Cable Construction

1. Phase conductor: Class 5 tinned copper conductor.
2. Insulation: Rubber compound for medium voltage flexible cable service.
3. Semiconductive layers: Semiconductive tape over the conductor plus inner and outer semiconductive rubber layers on the insulation.
4. Protective earth conductor: Individual copper wire screen.
5. Control conductor: Class 5 tinned copper conductor.
6. Central filler: Semiconductive compound on a textile polyester support.
7. Inner sheath: Rubber compound.
8. Monitoring conductor: Copper wire screen over the inner sheath.
9. Outer sheath: Red rubber compound.

Standards

Dimensions and Weight

Current Carrying Capacity at 30°C Ambient

Voltage Drop and De-Rating Notes

Voltage drop depends on conductor size and power factor. At power factor 0.8, typical voltage drop values are 1.45V/A/km for 25mm², 1.06V/A/km for 35mm², 0.77V/A/km for 50mm², 0.56V/A/km for 70mm², 0.45V/A/km for 95mm² and 0.36V/A/km for 120mm². Current capacity should also be corrected for ambient temperature. At 40°C the de-rating factor is 0.91; at 50°C it is 0.82; at 60°C it is 0.71; and at 80°C it is 0.41.

Applications

• Reeling drum power supply for tunnel boring machines.
• Medium voltage flexible cable routes in tunnel construction.
• Indoor and outdoor tunnel applications requiring red rubber-sheathed medium voltage cable.
• Mobile power supply where bending radius, torsional stress, tensile load and cable weight must be checked before installation.
• Project designs that require protective earth, control conductor and monitoring conductor functions in one cable construction.

Selection Notes for Buyers

For TBM reeling systems, cable selection should consider more than rated voltage. Buyers should check drum diameter, number of reeled layers, travel route, bending radius, torsion, ambient temperature, current load, voltage drop and available installation space. The same conductor size can carry different current depending on whether it is laid on the floor or reeled in multiple layers, so project quotations should include both the electrical load and the reeling arrangement.

Why Choose TEBAOFLEX CABLE

TEBAOFLEX CABLE supports tunneling contractors, mining projects, OEM equipment builders and cable distributors with medium voltage cable selection, documentation, custom lengths, drum packing, OEM marking and bulk supply. We can help match the (N)TSCGECECWÖU cable size to your voltage grade, current demand, reel design and operating environment.

FAQ

What is the (N)TSCGECECWÖU Cable used for?

The (N)TSCGECECWÖU Cable is used as a medium voltage flexible reeling cable for tunnel boring machine drums and tunnel power applications.

Which voltage ratings are available?

This cable is specified for 8.7/15kV and 12/20kV systems, with test voltages of 24kV and 29kV respectively.

Why does the cable include semiconductive layers?

Semiconductive layers help control electrical stress around the conductor and insulation in medium voltage operation, supporting more stable cable performance.

Can this cable be used on reeling drums?

Yes. It is intended for reeling drum operation, with a flexed minimum bending radius of 10 x overall diameter and maximum torsional stress of ±25°/m.

What information is needed for quotation?

Please provide voltage grade, conductor cross-section, required length, reel or drum design, number of reeled layers, installation environment, current load and any documentation or marking requirements.